diff --git a/utilities/Utilities/geometryPhasicFlow/stlWall/stlFile.cpp b/utilities/Utilities/geometryPhasicFlow/stlWall/stlFile.cpp
index c0366851..fdf1fe4d 100644
--- a/utilities/Utilities/geometryPhasicFlow/stlWall/stlFile.cpp
+++ b/utilities/Utilities/geometryPhasicFlow/stlWall/stlFile.cpp
@@ -52,7 +52,8 @@ bool pFlow::stlFile::readSolid
 (
 	iIstream& is,
 	realx3x3Vector & vertecies,
-	word & name
+	word & name,
+	real scaleFactor
 )
 {
 
@@ -113,7 +114,7 @@ bool pFlow::stlFile::readSolid
 		// read facet 
 		is.putBack(tok);
 		realx3x3 tri;
-		if( !readFacet(is, tri) ) return false;
+		if( !readFacet(is, tri, scaleFactor) ) return false;
 
 		vertecies.push_back(tri);
 		
@@ -126,7 +127,8 @@ bool pFlow::stlFile::readSolid
 bool pFlow::stlFile::readFacet
 (
 	iIstream& is,
-	realx3x3& tri
+	realx3x3& tri,
+	real scaleFactor
 )
 {
 	token tok;
@@ -162,9 +164,9 @@ bool pFlow::stlFile::readFacet
 		if(!checkNumberToken(is, tok, v.y()))return false;
 		is>>tok;
 		if(!checkNumberToken(is, tok, v.z()))return false;
-		if( i==0 ) tri.x() = v;
-		if( i==1 ) tri.y() = v;
-		if( i==2)  tri.z() = v;
+		if( i==0 ) tri.x() = v * scaleFactor;
+		if( i==1 ) tri.y() = v * scaleFactor;
+		if( i==2)  tri.z() = v * scaleFactor;
 	}
 	is>> tok;
 	if(!checkWordToken(is, tok, "endloop")) return false;
@@ -289,7 +291,7 @@ void pFlow::stlFile::addSolid
 
 
 
-bool pFlow::stlFile::read()
+bool pFlow::stlFile::read(real scaleFactor)
 {
 	solids_.clear();
 	solidNames_.clear();
@@ -303,7 +305,7 @@ bool pFlow::stlFile::read()
 		
 		realx3x3Vector vertecies;
 		word name;
-		if(!readSolid(is, vertecies, name))
+		if(!readSolid(is, vertecies, name, scaleFactor))
 		{
 			ioErrorInFile(is.name(), is.lineNumber());
 		 	return false;
diff --git a/utilities/Utilities/geometryPhasicFlow/stlWall/stlFile.hpp b/utilities/Utilities/geometryPhasicFlow/stlWall/stlFile.hpp
index eea2f928..236e4104 100644
--- a/utilities/Utilities/geometryPhasicFlow/stlWall/stlFile.hpp
+++ b/utilities/Utilities/geometryPhasicFlow/stlWall/stlFile.hpp
@@ -52,9 +52,9 @@ protected:
 
 	// - protected members
 
-		bool readSolid(iIstream& is, realx3x3Vector & vertecies, word & name);
+		bool readSolid(iIstream& is, realx3x3Vector & vertecies, word & name, real scaleFactor);
 
-		bool readFacet(iIstream& is, realx3x3& tri);
+		bool readFacet(iIstream& is, realx3x3& tri, real scaleFactor);
 
 		bool writeSolid(iOstream& os, const realx3x3Vector& vertecies, const word& name)const;
 
@@ -91,7 +91,7 @@ public:
 		void addSolid(const word& name, realx3x3Vector&& vertecies);
 
 		// - clear current content and read from file
-		bool read();
+		bool read(real scaleFactor);
 
 		// - write the current contnet to file
 		bool write()const;
diff --git a/utilities/Utilities/geometryPhasicFlow/stlWall/stlWall.cpp b/utilities/Utilities/geometryPhasicFlow/stlWall/stlWall.cpp
index cc561f3f..b502f4ca 100755
--- a/utilities/Utilities/geometryPhasicFlow/stlWall/stlWall.cpp
+++ b/utilities/Utilities/geometryPhasicFlow/stlWall/stlWall.cpp
@@ -31,11 +31,13 @@ bool pFlow::stlWall::readSTLWall
 {
 	auto fileName = dict.getVal<word>("file");
 
+	real scale = dict.getValOrSet("scale", static_cast<real>(1.0));
+
 	
 	fileSystem file("./stl",fileName);
 
 	stlFile stl(file);
-	if(!stl.read())
+	if(!stl.read(scale))
 	{
 		fatalErrorInFunction <<
 		"  error in reading stl file "<< file <<endl;