5/26/2023 0 Comments Block hexa 6 solutionThere is an Extrude tool for extrusion of the surface mesh along the curve, but it does not allow to describe a tube with a non-constant diameter. The cone sections are done usually with tetra.Īs I understood, there is no tool such a Cooper in ICEM CFD. So I can not see a reason for that.Īs a good quality-mesh solution, colleagues are using GAMBIT and making hexa mesh for pipes with some smooth diameter variations along the length using the Cooper tool. The blocks have the same properties (just switched to Free) and the geometry which they should fit is also looks quite the same way (unfortunately, I am not allowed to post any pictures of the mentioned problem). Actually, it is meshing some of external blocks (2 of 4 from external o-grid blocks) normally, but two others are meshed just with a surface mesh, without doing any volume mesh. I tried to change the cone-approximation blocks from Mapped into Free (the external blocks of O-grid) but ICEM gives a mistake that block XX can not be meshed. So that it is quite difficult to make a hexa-block structure for all of them. The mentioned pipe-assembly problem has cones which are punched and got a lot of deepening surface-parts. MultiZone may be able to mesh your entire model automatically. Note that we have added a lot of functionality to better support unstructured and swept blocks in 12, 12.1 and 13.0 (due out soon). If you don't like your hexa mesh density increasing thru the cones, you can convert the central HGrid block (and/or the surrounding Ogrid Blocks) to free. I would only recommend the Hexa Dominant mesher for FEA applications where the nice regular Hexa mesh near the surface is where the interesting stuff is happening.įor a piping assembly with steps and cones, I would just use ICEM CFD Hexa.Ĭreate an Ogrid for the pipe and split the ogrid to make the steps. We brought Hexa Dominant into ICEM CFD from ANSYS Meshing years ago. Actually, this method probably doesn't support baffles at all. You could get this with a baffle attached to the wall, etc. The error message happens when you have two volumes, but in simpler terms, it happens when you have a shell with a multiple edge (like a T connection). Hexa dominant starts from a surface mesh (quad shells) and grows them inward as far as it can until it eventually fills the core with tetras and pyramids ( junk ) for connectivity. There is one closed volume (at least it looks like that), where I have a Body point.Īny suggestion or ideas would be really very appreciated! I have checked and corrected the surface and surface-mesh normals, but it does not influence on the process. If I am trying to make a Hexa-Dominant mesh, I am getting the following error-message:Įrror orienting normals, perhaps there is more than one region This kind of mesh were allready generated with the same geomentry by my college using GAMBIT. I am able to make a full Tetra mesh or to change the core structure from Tetra to Hexa (12 to 1 modification), but I would like to have a bended Hexa mesh (not Cartesian) like I could make using the 3D-block structeres. I am importing the geometry model from CATIA. In this case, I would like to proceed without the 3D block-structures and make a Hexa-Dominant mesh for the cylindrical tubes and Tetra for the cone connections. I have some experience with block-made hexa meshes in the areas of wing-bodies or tubes with internal flows. I am doing the mesh for a bended tube with some shape variations along (changing diameter by step or using cone connections). Hexa-Dominant mesh for a bended tube - CFD Online Discussion Forums
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