Airfoil Not Showing Up In ParaView

ae.r.ospace00 · February 1, 2024, 18:44

I'm trying to use OpenFOAM to find the lift, drag, etc. on an airfoil/wing section I have. If I'm using the 3D wing section, I do have an .stl file. If it's the airfoil, I have a set of x, y coordinates outlining the airfoil in a .dat file. I am trying to edit a tutorial that came with OpenFOAM to change out my .stl file currently. I've made adjustments in blockMeshDict and snappyHexMeshDict to replace the files and measurements used in the motorbike tutorial.

The problem I'm having is that the case runs without errors and allows me to send it to ParaView, but it's an empty box. The walls of the space show up and have pressure values, but the wing section itself isn't appearing inside. I'm also getting all zeros for lift, drag, etc. What could I be doing wrong?

AtoHM · February 2, 2024, 01:35

Your meshing failed. Do not perform a simulation unless you have checked your mesh first.

Without further information my best guess is that you introduced a syntax or other error in snappyHexMesh which caused it to fail. The blockMesh was created successfully, otherwise you would not have a mesh to run on. Obviously your drag etc. is zero with no obstacle for the flow. You can share more information here: https://www.cfd-online.com/Forums/openfoam-meshing/ (or maybe this thread gets moved there altoghether by an admin).

February 1, 2024, 18:44	Airfoil Not Showing Up In ParaView	#1
ae.r.ospace00 New Member Join Date: Feb 2024 Posts: 1 Rep Power: 0	I'm trying to use OpenFOAM to find the lift, drag, etc. on an airfoil/wing section I have. If I'm using the 3D wing section, I do have an .stl file. If it's the airfoil, I have a set of x, y coordinates outlining the airfoil in a .dat file. I am trying to edit a tutorial that came with OpenFOAM to change out my .stl file currently. I've made adjustments in blockMeshDict and snappyHexMeshDict to replace the files and measurements used in the motorbike tutorial. The problem I'm having is that the case runs without errors and allows me to send it to ParaView, but it's an empty box. The walls of the space show up and have pressure values, but the wing section itself isn't appearing inside. I'm also getting all zeros for lift, drag, etc. What could I be doing wrong?

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February 2, 2024, 01:35		#2
AtoHM Senior Member M Join Date: Dec 2017 Posts: 695 Rep Power: 12	Your meshing failed. Do not perform a simulation unless you have checked your mesh first. Without further information my best guess is that you introduced a syntax or other error in snappyHexMesh which caused it to fail. The blockMesh was created successfully, otherwise you would not have a mesh to run on. Obviously your drag etc. is zero with no obstacle for the flow. You can share more information here: https://www.cfd-online.com/Forums/openfoam-meshing/ (or maybe this thread gets moved there altoghether by an admin).