Zahramht
commented
9 months ago Hey There, I am having some trouble with large and complex geometry in 3D; Specifically with the normal generation tool. The geometry is a fairly complicated .stl with curved & sloped floors and walls, that was generated in Solidworks and when viewed in Paraview, the normals all seem to be pointing in the +X direction (There should be a significant amount of normals in +/-X, +/-Y and +/-Z). I have tried saving the stl in both binary and ascii formats with the same results. I noticed today that in Solidworks there is an option to "Do not translate STL output data to positive space" as I save the stl... I haven't tried it yet but perhaps this is why my normals are showing up in paraview as all +X direction.
In 2D this geometry was imported and if I set initials to true: Normals - Parts, I was able to get mDBC to work without losing particles through the geometry (even though the normals didn't look correct in Paraview either - all +X direction as with the 3D simulation). Anyway, "Normals - Parts" is not an option with 3D and none of the other options for Initials seem to work.
Is there a way to generate the normals manually or fix them somehow? I would really like to get this simulation running with mDBC (works fine with DBC, no DDT and no shifting - When I use Fourtakas Full and a shifting algorithm I lose some particles out of some corners of my geometry. I am using 2 boundary layers with the fourtakas full as my geometry is 30mm thick and my DP is .02m or 20mm... Should I modify the geometry to be a multiple of .02 so that I can add more layers or will the simulation just force # of layers regardless of geometry thickness and DP?
Any help/advice/direction/personal experience would be much appreciated!
Hello Have you found a way to create normal vectors on Freecad? if so may I kindly ask for your contact information or if you have found any tutorial?
aepoc
imestevez
Hey There, I am having some trouble with large and complex geometry in 3D; Specifically with the normal generation tool. The geometry is a fairly complicated .stl with curved & sloped floors and walls, that was generated in Solidworks and when viewed in Paraview, the normals all seem to be pointing in the +X direction (There should be a significant amount of normals in +/-X, +/-Y and +/-Z). I have tried saving the stl in both binary and ascii formats with the same results. I noticed today that in Solidworks there is an option to "Do not translate STL output data to positive space" as I save the stl... I haven't tried it yet but perhaps this is why my normals are showing up in paraview as all +X direction.
In 2D this geometry was imported and if I set initials to true: Normals - Parts, I was able to get mDBC to work without losing particles through the geometry (even though the normals didn't look correct in Paraview either - all +X direction as with the 3D simulation). Anyway, "Normals - Parts" is not an option with 3D and none of the other options for Initials seem to work.
Is there a way to generate the normals manually or fix them somehow? I would really like to get this simulation running with mDBC (works fine with DBC, no DDT and no shifting - When I use Fourtakas Full and a shifting algorithm I lose some particles out of some corners of my geometry. I am using 2 boundary layers with the fourtakas full as my geometry is 30mm thick and my DP is .02m or 20mm... Should I modify the geometry to be a multiple of .02 so that I can add more layers or will the simulation just force # of layers regardless of geometry thickness and DP?
Any help/advice/direction/personal experience would be much appreciated!