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  1. Hi @Alucard Can you get the same result as the paper for 2D case? (My first post) Like this. I have tried several times and still could not get this and then I gave up. After that I use Top3d and got a quite similar optimal tree-like geometry both for 2D and 3D cases. For your 100x100x100 model, maybe you can try Top3d and see which one run fast. By the way, could you share your 100x100x100 model with me? my email is wumindao@gmail.com Thanks.
  2. Hi Prakash, Yes the formulation is based on convection and conduction, but the convection is not considered in the model.
  3. Hi Prakash, Thanks. I have change the heat flux type to QVOL, thus this type flux can be used to applied in design space domain. Take the 2D problem as example, I got a different optimal result (following photo) compare to the tree like structure optimal. Attached file is my model file. Appreciate if you could help me to check my model and see how can I change the setting to get a tree like structure optimal result. 2D classic.fem
  4. Hi Prakash, But the same problem is still there that CHBDYE can't be applied in topology design domain. For both 2D and 3D models, the flux need to be applied in the entire design domain. Do you have any other method to solve this problem?
  5. Hi Prakash, Thanks. Furthermore, is it possible to apply the heat flux on 3D solid elements (including outside surfaces and inside elements), so I can solve topology optimization in 3D domain. Following photos are showing the 2D and 3D domain model descriptions and results.
  6. Hi Prakash, Is there another method to set the Flux input to the entire plate (topology domain) ? As refer to the example above, that comes from attached paper, the optimization can be done by using Optistruct. Can I add heat flux to nodes/ elements without using CHBDYE ? Thermal Topology Optimization in OptiStruct Software.pdf
  7. Hi, I am trying to do a simple optimization, refer to the following example. I have make a fixed temperature at the top middle edge, but have error to run. How can I make a flux input to the entire surface? I am thinking that the flux input can't applied on Design_Space domain , right? I also attached my FEM file, for your reference. classic thermal compliance optimization.fem
  8. Dear Prakash, Thanks for your file. The reason for this type of error is the heat flux not be applied correctly in my model.
  9. For your 3) point. 3) I think load collector heat flux is empty no heat flux is seen in your model. I have add the heat flux on the top middle nodes, but after I export to solver deck, the heat flux missed.
  10. Dear Prakash, I am sorry for attached a wrong file, please find attached new updated file. my objective is to Minimize TCOMP (Thermal Compliance) plate_new.fem
  11. I share already... Anyway, attached again. Thanks. plate.fem
  12. Dear Prakash, I have two load collectors (heat_flux , spc_heat), and they are referenced by load case heat_transfer. Please see following screen shot.
  13. Dear Prakash, I have the same error. Could you help me? I need to build a 2D plate structure, which is subject to flux input to the top middle edge and fixed temperature at bottom two corners. Optimization is to Minimize TCOMP, with constraint volfrac <= 0.3 . I am also not sure whether my model is correct. Could you check my file and see whether the flux input and fixed temperature input are correct ? Please find my model file as attached, thanks very much. plate.fem
  14. Hi Prakash, Your file works very well ! Thanks. But I modified my file (e.g., make a new component which is non-design space, added VolumeFrac) and make it looks same as your one, but the error message still come out which is " DRESP1 1 is not referenced from within a linear heat transfer SUBCASE. This type of response must be specified from within a linear heat transfer SUBCASE." . May I know where you have modified ?
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