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. 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