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MartinM711

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About MartinM711

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  1. Hi Premanand! After finding edges and do "equivalence", it worked!! Thank you very very much for your support! Best wishes! Martin
  2. Hey, I have the following issue during meshing my 2D airfoil with an obtuse trailing edge: I would like to mesh my airfoil like that: BL-Mesh with quad elements from leading edge to trailing edge (upper and lower part of airfoil) and the vertical area at the trailing edge (photo: yellow 1D elements) with tria elements (therefore farfield instead of wall) in order to avoid the quad mesh around the trailing edge (see photo with red quad BL elements). However, when doing this with the Tool "2D Native BL Mesh Planar" it says "selected elements do not form closed loop" (see photo). Therefore I would like to ask, if there is a possibility to avoid quad elements at a certrain part around the airfoil with the Tool 2D Native BL Mesh (Planar)... Or is there a possibility to delete the quad elements around the trailing edge and remesh this area? Thank you very much in advance for your help! Cheers, Martin
  3. Yes, I really tried to give BCs to the 2D Mesh like that: However, during export (as described in my post before) it says "free edges found" and when I continue the export and let the CGNS-Mesh be read by my external solver, the solver describes my inner 2D elements (here: green) as a boundary, but I defined the green elements as Fluid... Therefore I think, that HM can only handle CGNS-Export of Mesh with 2D AND 3D Elements I also tried it with 1D elements for the cylinder surface and the farfield (boundary outside of the 2D mesh --> see my last post): However, HM says that only 2D elements and 3D elements are allowed during CGNS-Export...
  4. After I tried to export my 2D CFD Mesh as CGNS (Unstructured) in HM, I am asking myself if HyperMesh is NOT able to export 2D CGNS-Mesh. Therefore I would really like to know if there is a solution for my problem: My 2D mesh is for example looking like this: Before exporting this Mesh, I wanted to set up Boundary Conditions (inlet, wall, outlet for example) and did it with: Selecting Quad elements at the border and organize them to each according component (inlet -->inlet, ...) ==>problems occured: "Problem found in closedness of external boundary" and after that HM created an ^edges component with line elements on Border. When reading the CGNS file after export, the external solver says "no internal elements found" but "e.g. 4700 boundary elements found". These 4700 elements, however, are the elements inside the defined boundary Therefore I tried another method: I organized the line elements of the created ^edges component to my different boundary components (inlet, outlet, ...) and defined the quad elements in the inside as normal FLUID ==>after trying to export this mesh (all elements visible) via CGNS, it says: ==>The 246 elements that are not allowed are the line elements at border from the ^edges component: Now I am asking myself If HyperMesh can deal with a 2D Mesh export to CGNS with Boundary Information for the 2D Mesh... I am assuming that HyperMesh only wants to export 3D CGNS mesh (because there are always information windows like: "no volume elements found" etc.) Do you have any Idea? Thank you so much in advance! Regards
  5. I just found the options. Indeed, the student version is very limited when it comes to Export options: E.g. no CGNS export available...
  6. Thank you for your answer! When selecting CFD I am only able to select AcuSolve/ Nastran (Acusolve). Perhaps the reason for this is that I am using the Student version?
  7. Hello Guys, I have the following questions: - I just made a 2d Mesh and would like to export the mesh data for an external solver. This solver accepts CGNS-Mesh files. Is it possible to create a CGNS-file via Hypermesh Export? - Is it possible to create a structured 2D Mesh in HyperMesh with quads in which the quads take their orientation from geometry (e.g. lines or curves) so that the Mesh is really clean and structured? Thank you very much in advance! Regards
  8. Thank you so much! I just ran the script in HyperMesh and it worked
  9. Exactly, all z coords = 0. Perfect, that picture shows the result I'm looking for. Sorry for asking, but how should I apply the tcl file with my dat to import the data into HyperMesh? Again, thank you all very much for the excellent support! Regards
  10. This is my dat-file (coordinates of points) which I would really like to import into HyperMesh with the least amount of effort/ data conversion... A2_NASA-SC2-0711.dat
  11. Okay thank you! So one cannot avoid a modification of the data like this for the .dat file? The key-file can be then imported to HyperMesh? Again, thank you for your help!
  12. Hi tinh, thank you very much for your quick answer! For the spline construction, a CAD software would be more appropriate, that's true. Nethertheless I would like to know if there is a way to import dat. file into Hypermesh? Thank you and Greetings Martin
  13. Hi there! I have the following issue: In order to model a 2D airfoil with the help of several points I would like to import a ".dat file" that contains all the point coordinates for the airfoil surface. Is there a possible way to import these data directly without any file transformation? In addition, I would really like to know if it's possible, and if yes how, to connect all the airfoil surface points together with a SMOOTH and nice spline instead of strange linear splines? Thank you very much for your help! Kind regards Martin
  14. Hi Prakash! Thank you very much for your effort. We just analyzed the shell mass of the original model with the shell mass of the optimized model in Hypermesh after OSSmooth: The shell mass after OSSmooth is almost the same than before the optimization, which means that the shell was not updated after OSSmooth as it should be according to the optimization. Therefore it should not be only a visualization problem. Do you have a picture of your output model? Did you see the correct optimized shell in Hypermesh? We tried to remesh it and the message "self-intersection" came up... Thank you for any hints
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