Differences

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--- atmos:software:openfoam:home [2024/09/24 21:17] – delene
+++ atmos:software:openfoam:home [2025/05/18 21:59] (current) – perdomo
@@ Line 34: / Line 34: @@
   *To install an older version go to [[https://openfoam.org/]] and type "Download v#" (# = preferred version).
    Note: every different version will need to be installed by a system admin.
+==== Procedure ====
+) Within the 'run' directory start openFOAM: openfoam11-linux -p 510 -xhost
+) Navigate to the case directory.
+) Run the blockMesh command, to create a simple 3-D cubic domain.
+) Run the snappyHexMesh command, used to conform the volume mesh to the CAD model surface.
 ==== Issues ====
-=== Problems (2024/09/24) ===
+=== Problem (2024/09/24) ===
  * OpenFOAM NASA_P3_extendedPylon_CDP_OAP_v5.obj object files does not exist so model does execute.
 === Cause ===
- *
+ * .obj file missing from directory 0, in the NASA_extendedPylon_v2_tas120_aoa0_900T33.
 === Solution ===
+ * Locate file and place in correct directory.
+==== Procedure ====
+ * After successfully running snappyHexMesh, run checkMesh.
+==== Issues ====
+=== Problem (2024/09/24) ===
+ * Max skewness = 6.02536, 39 highly skew faces detected which may impair the quality of the results
+  <<Writing 39 skew faces to set skewFaces
+    Coupled point location match (average 0) OK.
+Failed 1 mesh checks.
+=== Cause ===
+ * maxBoundarySkewness set too high in the meshQualityDict.
+=== Solution ===
+ * Go to the System directory in the case directory. Open and edit the meshQualityDict to include the lines below
+ “minFaceWeight 0.02; 		// Already in your file, leave as is.”
+// Existing inclusion of defaults
+#includeEtc "caseDicts/mesh/generation/meshQualityDict"
+// Overriding critical parameters
+minFaceWeight 0.02; 		// Already in your file, leave as is.
+maxNonOrtho 65; 		// Slightly above your max value of 64.99.
+maxBoundarySkewness 4.5;	// Reduce from default (typically 20).
+maxInternalSkewness 4.5; 	// Reduce from default.
+maxAspectRatio 10;		// Reduce from current 21.34 if necessary.
+minVol 1e-8; 			// Prevents extremely small cells.
+minTetQuality 1e-6;		 // Ensures tetrahedral elements are valid.
+==== Procedure ====
+) After updating the meshQualityDict, run checkMesh command again
+==== Issues ====
+=== Problem (2024/09/24) ===
+ * OpenFOAM NASA_P3_extendedPylon_CDP_OAP_v5.obj object files does not exist so model does execute.
+=== Cause ===
+ * .obj file missing from directory 0, in the NASA_extendedPylon_v2_tas120_aoa0_900T33.
+=== Solution ===
+ * Locate file and place in correct directory.
+==== Procedure ====
+) After successfully running snappyHexMesh, run checkMesh.
+==== Issues ====
+=== Problem (2024/09/24) ===
+ * Max skewness = 4.49813, 42 highly skew faces detected which may impair the quality of the results
+  <<Writing 42 skew faces to set skewFaces
+    Coupled point location match (average 0) OK.
+=== Cause ===
+ * maxBoundarySkewness still set too high in the meshQualityDict.
+=== Solution ===
+ * Go to the System directory in the case directory. Open and edit the meshQualityDict to include the lines below
+ “minFaceWeight 0.02; 		// Already in the file, leave as is.”
+// Existing inclusion of defaults
+#includeEtc "caseDicts/mesh/generation/meshQualityDict"
+// Overriding critical parameters
+minFaceWeight 0.05; 		// Already in your file, leave as is.
+maxNonOrtho 65; 		// Slightly above your max value of 64.99.
+maxBoundarySkewness 4.0;	// Reduce from default (typically 20).
+maxInternalSkewness 4.0; 	// Reduce from default.
+maxAspectRatio 5;		// Reduce from current 21.34 if necessary.
+minVol 1e-8; 			// Prevents extremely small cells.
+minTetQuality 1e-6;		 // Ensures tetrahedral elements are valid.
+==== Procedure ====
+) Run checkMesh.
+) Update the 0 directory to match the new mesh size and to set the desired boundary conditions.
+) Use decomposePar to run breakup the simulation into multiple cores.
+) Run the rhoSimpleFoam solver.