Fem: add air and water fluid material into data/Mod/Material

src/Mod/Fem/_TaskPanelFemMaterial.py

@@ -264,7 +264,7 @@ class _TaskPanelFemMaterial:
             if not (1 - variation < float(old_vtec) / value < 1 + variation):
                 # VolumetricThermalExpansionCoefficient has changed
                 material = self.material
-                value_in_one_per_K = value * 1e6  # To compensate for use of SI units
+                value_in_one_per_K = value
                 material['VolumetricThermalExpansionCoefficient'] = unicode(value_in_one_per_K) + " m/m/K"
                 self.material = material
 
@@ -275,7 +275,7 @@ class _TaskPanelFemMaterial:
             if not (1 - variation < float(old_nu) / value < 1 + variation):
                 # KinematicViscosity has changed
                 material = self.material
-                value_in_m2_per_second = value * 1e6  # To compensate for use of SI units
+                value_in_m2_per_second = value
                 material['KinematicViscosity'] = unicode(value_in_m2_per_second) + " m^2/s"
                 self.material = material
 

src/Mod/Material/CMakeLists.txt

@@ -27,6 +27,14 @@ SET (MaterialLib_Files
 )
 SOURCE_GROUP("MatLib" FILES ${MaterialLib_Files})
 
+SET (FluidMaterial_Files
+    FluidMaterial/None.FCMat
+    FluidMaterial/Air.FCMat
+    FluidMaterial/Water.FCMat
+    FluidMaterial/Readme.txt
+)
+SOURCE_GROUP("MatLib" FILES ${FluidMaterial_Files})
+
 ADD_CUSTOM_TARGET(Material ALL
     SOURCES ${Material_SRCS} ${Material_QRC_SRCS}
 )
@@ -46,6 +54,9 @@ ENDIF (BUILD_GUI)
 ADD_CUSTOM_TARGET(MaterialLib ALL
     SOURCES ${MaterialLib_Files}
 )
+ADD_CUSTOM_TARGET(FluidMaterialLib ALL
+    SOURCES ${FluidMaterial_Files}
+)
 
 # When a target copies files to different output directories then apparently it always builds the project
 # which is very annoying. So, the trick is to split this into two targets to avoid this behaviour.
@@ -53,6 +64,10 @@ fc_target_copy_resource(MaterialLib
     ${CMAKE_SOURCE_DIR}/src/Mod/Material
     ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_DATADIR}/Mod/Material
     ${MaterialLib_Files})
+fc_target_copy_resource(FluidMaterialLib 
+    ${CMAKE_SOURCE_DIR}/src/Mod/Material
+    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_DATADIR}/Mod/Material
+    ${FluidMaterial_Files})
 
 INSTALL(
     FILES ${Material_SRCS} ${Material_QRC_SRCS}
@@ -62,6 +77,8 @@ INSTALL(
 INSTALL(
     DIRECTORY
         StandardMaterial
+    DIRECTORY
+        FluidMaterial
     DESTINATION
         ${CMAKE_INSTALL_DATADIR}/Mod/Material
     FILES_MATCHING PATTERN "*.FCMat*"

src/Mod/Material/FluidMaterial/Air.FCMat

@@ -0,0 +1,15 @@
+[FCMat]
+Name = Air
+Description = Standard air properties at 20 Degrees Celsius and 1 atm
+MolarMass = 28.965
+
+Density = 1.20 kg/m^3
+DynamicViscosity = 1.80e-5 kg/m/s
+KinematicViscosity = 1.511e-5 m^2/s
+
+VolumetricThermalExpansionCoefficient = 3.43e-3 m/m/K
+PrandtlNumber = 0.7
+
+SpecificHeat = 1.005 J/kg/K
+ThermalConductivity = 0.0257 W/m/K
+

src/Mod/Material/FluidMaterial/None.FCMat

@@ -0,0 +1,12 @@
+[FCdMat]
+Name = None
+Description = None
+
+Density = 0 kg/m^3
+DynamicViscosity = 0 kg/m/s
+KinematicViscosity = 0 m^2/s
+VolumetricExpansionCoefficient = 0 m/m/K
+
+SpecificHeat = 0 J/kg/K
+ThermalConductivity = 0 W/m/K
+ThermalExpansionCoefficient = 0 um/m/K

src/Mod/Material/FluidMaterial/Readme.txt

@@ -0,0 +1,7 @@
+This is the FreeCAD simple fluid material library
+data is taken from matweb
+currently only water and air at the standard condition (20C and 1 atm) is prepared for testing
+
+
+CSIR team is working on CfdFluidMaterial in CFD workbench to support more complex fluid material
+

src/Mod/Material/FluidMaterial/Water.FCMat

@@ -0,0 +1,14 @@
+[FCdMat]
+Name = Water
+Description = Standard distilled water properties at 20 Degrees Celsius and 1 atm
+MolarMass = 18
+
+Density = 998 kg/m^3
+DynamicViscosity = 1.003e-3 kg/m/s 
+KinematicViscosity = 1.005 m^2/s
+
+VolumetricExpansionCoefficient = 2.07e-4 m/m/K
+
+SpecificHeat = 4.182 J/kg/K
+ThermalConductivity = 0.591 W/m/K
+