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diameter->distance, update in tutorials, v-Blender readme.md
This commit is contained in:
Hamidreza
@ -1,4 +1,5 @@
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# Problem Definition (v-1.0)
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The problem is to simulate a rotating drum with a diameter of 0.24 m, a length of 0.1 m and 6 baffles rotating at 15 rpm. This drum is filled with 20000 particles, the integration time step is 0.00001 s. There are 2 types of particles in this drum, each of which is inserted during the simulation to fill the drum.
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* **12500** Particles with **4 mm** diameter, at the rate of 12500 particles/s for 1 sec.
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* **7500** Particles with **5mm** diameter, at the rate of 7500 particles/s for 1 sec.
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@ -15,10 +16,13 @@ The problem is to simulate a rotating drum with a diameter of 0.24 m, a length o
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</html>
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# Setting up the Case
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As it has been explained in the previous cases, the simulation case setup is based on text-based scripts. Here, the simulation case setup are sorted in three folders: `caseSetup`, `setting` and `stl`.
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As it has been explained in the previous cases, the simulation case setup is based on text-based scripts. Here, the simulation case setup are sorted in three folders: `caseSetup`, `setting` and `stl`.
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## Defining small and large particles
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Then in the `caseSetup/shapes` the diameter and the material name of the particles are defined. Two sizes are defined: 4 and 5 mm.
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Then in the `caseSetup/shapes` the diameter and the material name of the particles are defined. Two sizes are defined: 4 and 5 mm.
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```C++
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// names of shapes
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names (smallSphere largeSphere);
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@ -28,8 +32,8 @@ diameters (0.004 0.005);
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materials (lightMat heavyMat);
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```
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## Particle Insertion
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In this case we have two regions for inserting the particles. In both regions we define the insertion rate, the start and end time of the insertion, information about the volume of space through which the particles are inserted. The insertion phase in the simulation is performed between times 0 and 1 second.
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For example, for the insertion region for inserting light particles is shown below.
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@ -39,31 +43,44 @@ in <b>caseSetup/particleInsertion</b> file
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```C++
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// Right Layer Region
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layerrightregion
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// Right Region
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right_region
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{
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// type of insertion region
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timeControl simulationTime;
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regionType cylinder;
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// insertion rate (particles/s)
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// type of insertion region
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regionType cylinder;
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// insertion rate (particles/s)
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rate 12500;
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// Start time of LightParticles insertion (s)
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timeControl simulationTime;
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// Start time of insertion (s)
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startTime 0;
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// End time of LightParticles insertion (s)
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// End time of insertion (s)
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endTime 1;
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// Time Interval of LightParticles insertion (s)
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// Time Interval of insertion (s)
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insertionInterval 0.025;
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cylinderInfo
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{
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// Coordinates of cylinderRegion (m,m,m)
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p2 (-0.15 0.25 0.05);
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p1 (-0.15 0.24 0.05);
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// radius of cylinder (m)
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radius 0.035;
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// Coordinates of cylinderRegion (m,m,m)
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p2 (-0.15 0.25 0.05);
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p1 (-0.15 0.24 0.05);
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// radius of cylinder (m)
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radius 0.035;
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}
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setFields
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{
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velocity realx3 (0.0 -0.6 0.0); // initial velocity of inserted particles
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}
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mixture
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{
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smallSphere 1; // mixture composition of inserted particles
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}
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}
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```
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## Interaction between particles and walls
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The `caseSetup/interaction` file defines the material names and properties as well as the interaction parameters: the interaction between the particles and the shell of the rotating drum. Since we define 3 materials for simulation, the interaction matrix is 3x3, while we only need to enter upper triangle elements (interactions are symmetric).
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@ -73,36 +90,37 @@ materials (lightMat heavyMat wallMat);
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// density of materials [kg/m3]
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densities (1000 1500 2500);
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/*
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/*
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Property (lightMat-lightMat lightMat-heavyMat lightMat-wallMat
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heavyMat-heavyMat heavyMat-wallMat
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wallMat-wallMat );
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*/
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// Young modulus [Pa]
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*/
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// Young modulus [Pa]
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Yeff (1.0e6 1.0e6 1.0e6
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1.0e6 1.0e6
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1.0e6);
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// Shear modulus [Pa]
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// Shear modulus [Pa]
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Geff (0.8e6 0.8e6 0.8e6
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0.8e6 0.8e6
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0.8e6);
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// Poisson's ratio [-]
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// Poisson's ratio [-]
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nu (0.25 0.25 0.25
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0.25 0.25
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0.25);
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// coefficient of normal restitution
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// coefficient of normal restitution
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en (0.97 0.97 0.85
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0.97 0.85
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1.00);
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// dynamic friction
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// dynamic friction
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mu (0.65 0.65 0.35
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0.65 0.35
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0.35);
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// rolling friction
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// rolling friction
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mur (0.1 0.1 0.1
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0.1 0.1
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0.1);
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```
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## Settings
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### Geometry
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In the `settings/geometryDict` file, the geometry and axis of rotation is defined for the drum. The geometry is composed of a body, front and rear ends.
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@ -163,28 +181,32 @@ surfaces
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In this part of `geometryDict` the information of rotating axis and speed of rotation are defined. The start of rotation is at 2 s. The first 2 seconds of simulation is for allowing particles to settle donw in the drum.
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```C++
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motionModel rotatingAxis;
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motionModel rotatingAxis;
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rotatingAxisInfo
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{
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rotAxis
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{
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// first point for the axis of rotation
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p1 (-0.1974 0.2269 0);
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// second point for the axis of rotation
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p2 (-0.1974 0.2269 0.1);
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// rotation speed (rad/s) => 15 rpm
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omega 2.38733;
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// Start time of Geometry Rotating
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startTime 2;
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// End time of Geometry Rotating
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endTime 9.5;
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p1 (-0.1974 0.2269 0);
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// second point for the axis of rotation
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p2 (-0.1974 0.2269 0.1);
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// rotation speed (rad/s) => 15 rpm
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omega 2.38733;
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// Start time of Geometry Rotating
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startTime 2;
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// End time of Geometry Rotating
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endTime 9.5;
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}
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}
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```
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## Performing Simulation
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To run simulations, type the following commands in the terminal one at a time.
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Enter `particlesPhasicFlow` command to create the initial fields for particles.
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Enter `geometryPhasicFlow` command to create the Geometry.
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At last, enter `sphereGranFlow` command to start the simulation.
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After finishing the simulation, you can use `pFlowtoVTK` to convert the results into vtk format stored in ./VTK folder.
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After finishing the simulation, you can use `pFlowtoVTK` to convert the results into vtk format stored in ./VTK folder.
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@ -6,6 +6,7 @@ objectName interaction;
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objectType dicrionary;
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fileFormat ASCII;
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/*---------------------------------------------------------------------------*/
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materials (lightMat heavyMat wallMat); // a list of materials names
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densities (1000 1500 2500); // density of materials [kg/m3]
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@ -14,7 +15,7 @@ contactListType sortedContactList;
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contactSearch
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{
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method NBS; // method for broad search
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method NBS;
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updateInterval 10;
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@ -6,78 +6,78 @@ objectName particleInsertion;
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objectType dicrionary;
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fileFormat ASCII;
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/*---------------------------------------------------------------------------*/
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active Yes; // is insertion active -> Yes or No
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active Yes; // is insertion active -> Yes or No
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/*
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Two layers of particles are packed one-by-one using 1 insertion steps
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*/
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layerrightregion // Right Layer Region
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right_region
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{
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timeControl simulationTime;
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regionType cylinder; // type of insertion region
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regionType cylinder; // type of insertion region
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rate 12500; // Right Region Particles Insertion Rate (particles/s)
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rate 12500; // Right Region Particles Insertion Rate (particles/s)
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startTime 0; // Start time of LightParticles insertion (s)
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startTime 0; // Start time of insertion (s)
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endTime 1; // End time of LightParticles insertion (s)
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endTime 1; // End time of insertion (s)
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insertionInterval 0.025; // Time Interval of LightParticles insertion (s)
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insertionInterval 0.025; // Time Interval of particles insertion (s)
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cylinderInfo
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{
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p2 (-0.15 0.25 0.05); // Top of cylinderRegion (m,m,m)
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p2 (-0.15 0.25 0.05); // Top of cylinderRegion (m,m,m)
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p1 (-0.15 0.24 0.05); // Bottom of cylinderRegion (m,m,m)
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p1 (-0.15 0.24 0.05); // Bottom of cylinderRegion (m,m,m)
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radius 0.035; // radius of cylinder (m)
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radius 0.035; // radius of cylinder (m)
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}
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setFields
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{
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velocity realx3 (0.0 -0.6 0.0); // initial velocity of inserted particles
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velocity realx3 (0.0 -0.6 0.0); // initial velocity of inserted particles
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}
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mixture
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{
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smallSphere 1; // mixture composition of inserted particles
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smallSphere 1; // mixture composition of inserted particles
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}
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}
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layerleftregion // Left Layer Region
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left_region
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{
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timeControl simulationTime;
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regionType cylinder; // type of insertion region
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regionType cylinder; // type of insertion region
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rate 7500; // Left Region Particles Insertion Rate (particles/s)
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rate 7500; // Left Region Particles Insertion Rate (particles/s)
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startTime 0; // Start time of LightParticles insertion (s)
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startTime 0; // Start time of insertion (s)
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endTime 1; // End time of LightParticles insertion (s)
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endTime 1; // End time of insertion (s)
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insertionInterval 0.025; // Time Interval of LightParticles insertion (s)
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insertionInterval 0.025; // Time Interval of insertion (s)
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cylinderInfo
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{
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p2 (-0.23 0.25 0.05); // Top of cylinderRegion (m,m,m)
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p2 (-0.23 0.25 0.05); // Top of cylinderRegion (m,m,m)
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p1 (-0.23 0.24 0.05); // Bottom of cylinderRegion (m,m,m)
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p1 (-0.23 0.24 0.05); // Bottom of cylinderRegion (m,m,m)
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radius 0.035; // radius of cylinder (m)
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radius 0.035; // radius of cylinder (m)
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}
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setFields
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{
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velocity realx3 (0.0 -0.6 0.0); // initial velocity of inserted particles
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velocity realx3 (0.0 -0.6 0.0); // initial velocity of inserted particles
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}
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mixture
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{
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largeSphere 1; // only heavySphere
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largeSphere 1; // only heavySphere
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}
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}
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@ -2,12 +2,13 @@
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| phasicFlow File |
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| copyright: www.cemf.ir |
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\* ------------------------------------------------------------------------- */
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objectName sphereDict;
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objectType sphereShape;
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objectName sphereDict;
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objectType sphereShape;
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fileFormat ASCII;
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/*---------------------------------------------------------------------------*/
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names (smallSphere largeSphere); // names of shapes
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diameters (0.004 0.005); // diameter of shapes (m)
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materials (lightMat heavyMat); // material names for shapes
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|
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names (smallSphere largeSphere); // names of shapes
|
||||
|
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diameters (0.004 0.005); // diameter of shapes (m)
|
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|
||||
materials (lightMat heavyMat); // material names for shapes
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@ -6,42 +6,44 @@ objectName domainDict;
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objectType dictionary;
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fileFormat ASCII;
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||||
/*---------------------------------------------------------------------------*/
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||||
globalBox // Simulation domain: every particles that goes outside this domain will be deleted
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{
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min (-0.328 0.095 -0.025); // lower corner point of the box
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max (-0.068 0.355 0.125); // upper corner point of the box
|
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// Simulation domain: every particles that goes outside this domain will be deleted
|
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globalBox
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||||
{
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||||
min (-0.328 0.095 -0.025); // lower corner point of the box
|
||||
|
||||
max (-0.068 0.355 0.125); // upper corner point of the box
|
||||
}
|
||||
|
||||
boundaries
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||||
{
|
||||
left
|
||||
{
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||||
type exit; // other options: periodic, reflective
|
||||
type exit; // other options: periodic, reflective
|
||||
}
|
||||
|
||||
right
|
||||
{
|
||||
type exit; // other options: periodict, reflective
|
||||
type exit; // other options: periodic, reflective
|
||||
}
|
||||
|
||||
bottom
|
||||
{
|
||||
type exit; // other options: periodict, reflective
|
||||
type exit; // other options: periodic, reflective
|
||||
}
|
||||
|
||||
top
|
||||
{
|
||||
type exit; // other options: periodict, reflective
|
||||
type exit; // other options: periodic, reflective
|
||||
}
|
||||
|
||||
rear
|
||||
{
|
||||
type exit; // other options: periodict, reflective
|
||||
type exit; // other options: periodic, reflective
|
||||
}
|
||||
|
||||
front
|
||||
{
|
||||
type exit; // other options: periodict, reflective
|
||||
type exit; // other options: periodic, reflective
|
||||
}
|
||||
}
|
||||
|
||||
@ -2,80 +2,81 @@
|
||||
| phasicFlow File |
|
||||
| copyright: www.cemf.ir |
|
||||
\* ------------------------------------------------------------------------- */
|
||||
objectName geometryDict;
|
||||
objectType dictionary;
|
||||
objectName geometryDict;
|
||||
objectType dictionary;
|
||||
fileFormat ASCII;
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
||||
motionModel rotatingAxis;
|
||||
|
||||
rotatingAxisInfo
|
||||
{
|
||||
rotAxis
|
||||
{
|
||||
p1 (-0.1974 0.2269 0); // first point for the axis of rotation
|
||||
|
||||
p2 (-0.1974 0.2269 0.1); // second point for the axis of rotation
|
||||
|
||||
omega 2.38733; // rotation speed (rad/s) => 15 rpm
|
||||
|
||||
startTime 2; // Start time of Geometry Rotating
|
||||
|
||||
endTime 9.5; // End time of Geometry Rotating
|
||||
}
|
||||
{
|
||||
p1 (-0.1974 0.2269 0); // first point for the axis of rotation
|
||||
|
||||
p2 (-0.1974 0.2269 0.1); // second point for the axis of rotation
|
||||
|
||||
omega 2.38733; // rotation speed (rad/s) => 15 rpm
|
||||
|
||||
startTime 2; // Start time of Geometry Rotating
|
||||
|
||||
endTime 9.5; // End time of Geometry Rotating
|
||||
}
|
||||
}
|
||||
|
||||
surfaces
|
||||
{
|
||||
body
|
||||
{
|
||||
type stlWall; // type of the wall
|
||||
|
||||
file Body.stl; // file name in stl folder
|
||||
|
||||
material wallMat; // material name of this wall
|
||||
|
||||
motion rotAxis; // motion component name
|
||||
}
|
||||
body
|
||||
{
|
||||
type stlWall; // type of the wall
|
||||
|
||||
file Body.stl; // file name in stl folder
|
||||
|
||||
material wallMat; // material name of this wall
|
||||
|
||||
motion rotAxis; // motion component name
|
||||
}
|
||||
|
||||
/*
|
||||
This is a Cylinder Wall at the rear of cylinder
|
||||
*/
|
||||
/*
|
||||
This is a Cylinder Wall at the rear of cylinder
|
||||
*/
|
||||
|
||||
rearEnd
|
||||
{
|
||||
type cylinderWall; // type of the wall
|
||||
|
||||
p1 (-0.1974 0.2269 -0.001); // first point for the axis of rotation
|
||||
|
||||
p2 (-0.1974 0.2269 0.0); // second point for the axis of rotation
|
||||
|
||||
radius1 0.0001; // Radius of p1
|
||||
|
||||
radius2 0.12; // Radius of p2
|
||||
|
||||
material wallMat; // material name of the wall
|
||||
|
||||
motion rotAxis; // motion component name
|
||||
}
|
||||
rearEnd
|
||||
{
|
||||
type cylinderWall; // type of the wall
|
||||
|
||||
p1 (-0.1974 0.2269 -0.001); // first point for the axis of rotation
|
||||
|
||||
p2 (-0.1974 0.2269 0.0); // second point for the axis of rotation
|
||||
|
||||
radius1 0.0001; // Radius of p1
|
||||
|
||||
radius2 0.12; // Radius of p2
|
||||
|
||||
material wallMat; // material name of the wall
|
||||
|
||||
motion rotAxis; // motion component name
|
||||
}
|
||||
|
||||
/*
|
||||
This a cylinder Wall at the front of Cylinder
|
||||
*/
|
||||
/*
|
||||
This a cylinder Wall at the front of Cylinder
|
||||
*/
|
||||
|
||||
frontEnd
|
||||
{
|
||||
type cylinderWall; // type of the wall
|
||||
|
||||
p1 (-0.1974 0.2269 0.0989); // first point for the axis of rotation
|
||||
|
||||
p2 (-0.1974 0.2269 0.0990); // second point for the axis of rotation
|
||||
|
||||
radius1 0.0001; // Radius of p1
|
||||
|
||||
radius2 0.12; // Radius of p2
|
||||
|
||||
material wallMat; // material name of the wall
|
||||
|
||||
motion rotAxis; // motion component name
|
||||
}
|
||||
frontEnd
|
||||
{
|
||||
type cylinderWall; // type of the wall
|
||||
|
||||
p1 (-0.1974 0.2269 0.0989); // first point for the axis of rotation
|
||||
|
||||
p2 (-0.1974 0.2269 0.0990); // second point for the axis of rotation
|
||||
|
||||
radius1 0.0001; // Radius of p1
|
||||
|
||||
radius2 0.12; // Radius of p2
|
||||
|
||||
material wallMat; // material name of the wall
|
||||
|
||||
motion rotAxis; // motion component name
|
||||
}
|
||||
}
|
||||
|
||||
@ -10,9 +10,7 @@ setFields
|
||||
{
|
||||
/*
|
||||
Default value for fields defined for particles
|
||||
|
||||
These fields should always be defined for simulations with
|
||||
|
||||
spherical particles.
|
||||
*/
|
||||
|
||||
@ -29,30 +27,13 @@ setFields
|
||||
|
||||
selectors
|
||||
{
|
||||
shapeAssigne
|
||||
{
|
||||
selector stridedRange; // other options: box, cylinder, sphere, randomPoints
|
||||
|
||||
stridedRangeInfo
|
||||
{
|
||||
begin 0; // begin index of points
|
||||
|
||||
end 20000; // end index of points
|
||||
|
||||
stride 3; // stride for selector
|
||||
}
|
||||
|
||||
fieldValue // fields that the selector is applied to
|
||||
{
|
||||
shapeName word sphere1; // sets shapeName of the selected points to largeSphere
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
positionParticles // positions particles
|
||||
positionParticles
|
||||
{
|
||||
method empty; // other options: random and ordered
|
||||
method empty; // other options: random, file and ordered
|
||||
}
|
||||
|
||||
|
||||
|
||||
@ -2,34 +2,36 @@
|
||||
| phasicFlow File |
|
||||
| copyright: www.cemf.ir |
|
||||
\* ------------------------------------------------------------------------- */
|
||||
objectName settingsDict;
|
||||
objectType dictionary;
|
||||
objectName settingsDict;
|
||||
objectType dictionary;
|
||||
fileFormat ASCII;
|
||||
/*---------------------------------------------------------------------------*/
|
||||
run RotatingDrumwithBaffles;
|
||||
run RotatingDrumwithBaffles;
|
||||
|
||||
dt 0.00001; // time step for integration (s)
|
||||
dt 0.00001; // time step for integration (s)
|
||||
|
||||
startTime 0; // start time for simulation
|
||||
startTime 0; // start time for simulation
|
||||
|
||||
endTime 10; // end time for simulation
|
||||
endTime 10; // end time for simulation
|
||||
|
||||
saveInterval 0.05; // time interval for saving the simulation
|
||||
saveInterval 0.05; // time interval for saving the simulation
|
||||
|
||||
timePrecision 6; // maximum number of digits for time folder
|
||||
timePrecision 6; // maximum number of digits for time folder
|
||||
|
||||
g (0 -9.8 0); // gravity vector (m/s2)
|
||||
g (0 -9.8 0); // gravity vector (m/s2)
|
||||
|
||||
// save necessary (i.e., required) data on disk
|
||||
// save necessary data on disk
|
||||
includeObjects (diameter);
|
||||
|
||||
// exclude unnecessary data from saving on disk
|
||||
excludeObjects (rVelocity.dy1 pStructPosition.dy1 pStructVelocity.dy1);
|
||||
excludeObjects ();
|
||||
|
||||
integrationMethod AdamsBashforth2; // integration method
|
||||
integrationMethod AdamsBashforth2; // integration method
|
||||
|
||||
writeFormat ascii; // data writting format (ascii or binary)
|
||||
integrationHistory off; // to sace space on disk
|
||||
|
||||
timersReport Yes; // report timers (Yes or No)
|
||||
writeFormat ascii; // data writting format (ascii or binary)
|
||||
|
||||
timersReportInterval 0.1; // time interval for reporting timers
|
||||
timersReport Yes; // report timers (Yes or No)
|
||||
|
||||
timersReportInterval 0.1; // time interval for reporting timers
|
||||
|
||||
Reference in New Issue
Block a user