Hi Wei, The updated obj mesh is attached. The mesh is of quad elements, but not rectangle elements.
I am not sure whether this would be OK. On Thursday, August 11, 2022 at 1:30:52 AM UTC+8 [email protected] wrote: > Can you please convert the mesh file to OBJ format so we can take a look. > Keep in mind that we only support mesh with rectangle elements now. > Otherwise, it probably will take a while to get this case built correctly. > > Thank you, > Wei > > On Wed, Aug 10, 2022 at 10:49 AM Trinidad Mcdavids <[email protected]> > wrote: > >> file now attached. three format provided. >> >> On Wednesday, August 10, 2022 at 11:19:58 PM UTC+8 Trinidad Mcdavids >> wrote: >> >>> Hi Wei, >>> >>> I tried to get myself familiar on the vector structure, but it seems a >>> bit challenging. >>> >>> Do you have existing functions that can extract the required >>> elements/nodes vector from existing mesh files? I attached a nastran BDF >>> file, if needed, i can also convert it to gmsh .msh file or abaqus .inp >>> file. >>> >>> Thanks & Regards, >>> Trinidad >>> >>> On Wednesday, August 10, 2022 at 10:04:11 PM UTC+8 [email protected] >>> wrote: >>> >>>> Hi Trinidad, >>>> >>>> Yes, if you can generate a mesh file based on the FSI requirement, I >>>> think it's doable. You can drop your updated mesh file and new code here, >>>> so we can take a look at it, and probably can do a test for you at our end. >>>> >>>> For post-processing, we can extract the stress and deformation of the >>>> flexible body and also the pressure/velocity field of the fluid. >>>> >>>> Thank you, >>>> Wei >>>> >>>> On Wed, Aug 10, 2022 at 12:26 AM Trinidad Mcdavids <[email protected]> >>>> wrote: >>>> >>>>> Dear Wei, >>>>> >>>>> Since my case is a bit urgent, I would like to try the manual method >>>>> of generating the mesh. Do you think it is feasible? >>>>> >>>>> I can generate quad shell mesh using gmsh, do you think it is possible >>>>> to export to the manual mesh vector? I can write a small function to do >>>>> this, e.g read gmsh .msh file and export the vectors. >>>>> >>>>> Finally, how about the post-processing? do you think it is possible to >>>>> extract the flexible body stress & deformation to vtk file? how about >>>>> fluid >>>>> contour map? >>>>> >>>>> On Wednesday, August 10, 2022 at 12:01:50 PM UTC+8 [email protected] >>>>> wrote: >>>>> >>>>>> Hi Trinidad, >>>>>> >>>>>> In the current implementation of Chrono::FSI, we have very limited >>>>>> support for interaction with flexible bodies. We only support flexible >>>>>> bodies described with the ANCF cable element or ANCF shell element. >>>>>> Unfortunately, we can not read directly from a mesh file. You should >>>>>> manually input those elements and nodes to a mesh. The ANCF shell >>>>>> elements >>>>>> should also be rectangular elements which I believe it's not the case >>>>>> with >>>>>> the mesh you import from an OBJ file. Another important thing you need >>>>>> to >>>>>> take care of is related to *NodeNeighborElement_mesh* and * >>>>>> _2D_elementsNodes_mesh*. The two vectors contain important >>>>>> information that is needed for the simulation and should be initialized >>>>>> with the correct value. You can take a look at that flexible element >>>>>> demo >>>>>> and see how these two vectors are initialized therein. >>>>>> >>>>>> We haven't maintained the flexible bodies support in FSI for about >>>>>> three years, so it probably takes a while to modify the code and make it >>>>>> works for your case. However, *the good news is*, we restarted the >>>>>> maintenance of this feature two weeks ago. The ongoing work in the next >>>>>> couple of months is to make it available to directly read a mesh from an >>>>>> OBJ file and generate BCE automatically, which I believe is exactly the >>>>>> feature you want to use in your demo, so the user can use this code much >>>>>> easier. We'll make it as fast as possible, please stay tuned with the >>>>>> *main* branch of Chrono. >>>>>> >>>>>> Thank you, >>>>>> Wei >>>>>> >>>>>> On Tue, Aug 9, 2022 at 10:00 PM Trinidad Mcdavids <[email protected]> >>>>>> wrote: >>>>>> >>>>>>> Hello, >>>>>>> >>>>>>> I am trying to simulate a case of flexible ball impacting water >>>>>>> surface (similar to the case cylinderDrop, the difference is the >>>>>>> cylinder >>>>>>> is elastic install regid). The ball mesh was imported from obj file >>>>>>> instead >>>>>>> of generated manually. >>>>>>> >>>>>>> 1. I made an example case out of "fsi_felxbile element" & >>>>>>> "fsi_cylinderdrop", but is a bit lost regarding the BCE setting? how >>>>>>> can >>>>>>> the BCE be applied for the imported fem mesh? >>>>>>> >>>>>>> 2. The examples case i made is attached. It seems the case can not >>>>>>> be compiled with many errors. Could you please kindly help to quick >>>>>>> check >>>>>>> what is wrong in my codes? >>>>>>> >>>>>>> 3. Regarding the post processing, i would like to show the >>>>>>> deformation & stress of the elastic body as well as the >>>>>>> pressure/velocity >>>>>>> contour map of the fluid to be exported to vtk file. how can this be >>>>>>> done? >>>>>>> >>>>>>> -- >>>>>>> You received this message because you are subscribed to the Google >>>>>>> Groups "ProjectChrono" group. >>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>> send an email to [email protected]. >>>>>>> To view this discussion on the web visit >>>>>>> https://groups.google.com/d/msgid/projectchrono/d7917585-9dd6-4989-9878-dd86fb95d425n%40googlegroups.com >>>>>>> >>>>>>> <https://groups.google.com/d/msgid/projectchrono/d7917585-9dd6-4989-9878-dd86fb95d425n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>>> . >>>>>>> >>>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "ProjectChrono" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> >>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/projectchrono/aa66fa4f-5911-4e2b-8ccb-a16200735e89n%40googlegroups.com >>>>> >>>>> <https://groups.google.com/d/msgid/projectchrono/aa66fa4f-5911-4e2b-8ccb-a16200735e89n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> -- >> You received this message because you are subscribed to the Google Groups >> "ProjectChrono" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/projectchrono/f4574bc1-e0bd-4490-9c3e-a6b10fe88274n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/projectchrono/f4574bc1-e0bd-4490-9c3e-a6b10fe88274n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/e481ea96-26d8-4252-a196-abde4a4c6da7n%40googlegroups.com.
torus.obj
Description: Binary data
