[FEM] fix 1D thermomech example

- the heat capacity of water was wrong
- also specify just thermal expansion, this make that water is recognized as material and then all water parameters will be available

(that the analysis fail despite CalculiX reports everything went well s is another issue, I will investigate later)

src/Mod/Fem/femexamples/thermomech_flow1d.py

@@ -148,9 +148,9 @@ def setup(doc=None, solvertype="ccxtools"):
     mat = material_obj.Material
     mat["Name"] = "Water"
     mat["Density"] = "998 kg/m^3"
-    mat["SpecificHeat"] = "4.182 J/kg/K"
+    mat["SpecificHeat"] = "4182 J/kg/K"
     mat["DynamicViscosity"] = "1.003e-3 kg/m/s"
-    mat["VolumetricThermalExpansionCoefficient"] = "2.07e-4 m/m/K"
+    mat["ThermalExpansionCoefficient"] = "2.07e-4 m/m/K"
     mat["ThermalConductivity"] = "0.591 W/m/K"
     material_obj.Material = mat
     analysis.addObject(material_obj)

src/Mod/Fem/femtest/data/calculix/thermomech_flow1D.inp

@@ -91,7 +91,7 @@ Eedges
 *DENSITY
 9.98E-10
 *FLUID CONSTANTS
-4182000,1.003E-09
+4182000000,1.003E-09
 
 ***********************************************************
 ** Sections