From d0dd9897c813837dd966afdc7df1a0cb6338e7ba Mon Sep 17 00:00:00 2001
From: FEA-eng <59876896+FEA-eng@users.noreply.github.com>
Date: Sun, 8 Sep 2024 20:06:39 +0200
Subject: [PATCH 1/3] FEM: Update task_material_common.py

Fix from benj5378
---
 .../Fem/femtaskpanels/task_material_common.py | 26 +++++++++----------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/src/Mod/Fem/femtaskpanels/task_material_common.py b/src/Mod/Fem/femtaskpanels/task_material_common.py
index 40944c1d63..d2c1afdc94 100644
--- a/src/Mod/Fem/femtaskpanels/task_material_common.py
+++ b/src/Mod/Fem/femtaskpanels/task_material_common.py
@@ -567,20 +567,18 @@ class _TaskPanel(base_femtaskpanel._BaseTaskPanel):
             old_value = Units.Quantity(self.material[matProperty]).Value
             # value = float(inputfield_text)  # this fails on locale with comma
             # https://forum.freecad.org/viewtopic.php?f=18&t=56912&p=523313#p523313
-        if value:
-            if not (1 - variation < float(old_value) / value < 1 + variation):
-                material = self.material
-                if qUnit != "":
-                    material[matProperty] = str(value) + " " + qUnit
-                else:
-                    material[matProperty] = str(value)
-                self.material = material
-                if self.has_transient_mat is False:
-                    self.add_transient_material()
-                else:
-                    self.set_transient_material()
-        else:
-            pass  # some check or default value set can be done here
+
+        if not (1 - variation < float(old_value) / value < 1 + variation):
+            material = self.material
+            if qUnit != "":
+                material[matProperty] = str(value) + " " + qUnit
+            else:
+                material[matProperty] = str(value)
+            self.material = material
+            if self.has_transient_mat is False:
+                self.add_transient_material()
+            else:
+                self.set_transient_material()
         # print(inputfield_text)
 
     # mechanical input fields

From fd41e291284f279f01a58d4d8eb2ddac55870696 Mon Sep 17 00:00:00 2001
From: FEA-eng <59876896+FEA-eng@users.noreply.github.com>
Date: Sun, 8 Sep 2024 20:10:27 +0200
Subject: [PATCH 2/3] FEM: Update write_femelement_material.py

---
 src/Mod/Fem/femsolver/calculix/write_femelement_material.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Mod/Fem/femsolver/calculix/write_femelement_material.py b/src/Mod/Fem/femsolver/calculix/write_femelement_material.py
index 481ad5ce00..c289f8d62c 100644
--- a/src/Mod/Fem/femsolver/calculix/write_femelement_material.py
+++ b/src/Mod/Fem/femsolver/calculix/write_femelement_material.py
@@ -82,8 +82,9 @@ def write_femelement_material(f, ccxwriter):
                 TEC = FreeCAD.Units.Quantity(mat_obj.Material["ThermalExpansionCoefficient"])
                 TEC_in_mmK = TEC.getValueAs("mm/mm/K").Value
             elif mat_obj.Category == "Fluid":
-                DV = FreeCAD.Units.Quantity(mat_obj.Material["DynamicViscosity"])
-                DV_in_tmms = DV.getValueAs("t/mm/s").Value
+                KV = FreeCAD.Units.Quantity(mat_obj.Material["KinematicViscosity"])
+                KV_in_mm2s = KV.getValueAs("mm^2/s").Value
+                DV_in_tmms = KV_in_mm2s * density_in_tonne_per_mm3
 
         # write material properties
         f.write(f"** FreeCAD material name: {mat_info_name}\n")

From 10f9ef41e51970603311068159625faaf7478c7e Mon Sep 17 00:00:00 2001
From: FEA-eng <59876896+FEA-eng@users.noreply.github.com>
Date: Sun, 8 Sep 2024 20:14:46 +0200
Subject: [PATCH 3/3] FEM: Update Material.ui

---
 src/Mod/Fem/Gui/Resources/ui/Material.ui | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/Mod/Fem/Gui/Resources/ui/Material.ui b/src/Mod/Fem/Gui/Resources/ui/Material.ui
index d47b5a97d8..7efe5269b8 100755
--- a/src/Mod/Fem/Gui/Resources/ui/Material.ui
+++ b/src/Mod/Fem/Gui/Resources/ui/Material.ui
@@ -183,7 +183,7 @@
            <double>2.000000000000000</double>
           </property>
           <property name="maximum">
-           <double>2000000000.000000000000000</double>
+           <double>99999999999.000000000000000</double>
           </property>
           <property name="unit" stdset="0">
            <string notr="true">kg/m^3</string>
@@ -252,7 +252,7 @@
            <double>2.000000000000000</double>
           </property>
           <property name="maximum">
-           <double>90000000000.000000000000000</double>
+           <double>99999999999.000000000000000</double>
           </property>
           <property name="unit" stdset="0">
            <string notr="true">Pa</string>
@@ -362,7 +362,7 @@
            <double>0.000001000000000</double>
           </property>
           <property name="maximum">
-           <double>1000.000000000000000</double>
+           <double>99999999999.000000000000000</double>
           </property>
           <property name="unit" stdset="0">
            <string notr="true">m^2/s</string>
@@ -431,7 +431,7 @@
            <double>2.000000000000000</double>
           </property>
           <property name="maximum">
-           <double>2000000000.000000000000000</double>
+           <double>99999999999.000000000000000</double>
           </property>
           <property name="unit" stdset="0">
            <string notr="true">W/m/K</string>
@@ -478,7 +478,7 @@
            <double>2.000000000000000</double>
           </property>
           <property name="maximum">
-           <double>2000000000.000000000000000</double>
+           <double>99999999999.000000000000000</double>
           </property>
           <property name="unit" stdset="0">
            <string notr="true">m/m/K</string>
@@ -525,7 +525,7 @@
            <double>2.000000000000000</double>
           </property>
           <property name="maximum">
-           <double>2050000000.000000000000000</double>
+           <double>99999999999.000000000000000</double>
           </property>
           <property name="unit" stdset="0">
            <string notr="true">J/kg/K</string>