Hi Huzaifa, Excellent--this is very helpful. That source file looks like exactly the kind of thing I'm looking for.
Thanks! Dan On Wednesday, November 19, 2025 at 2:33:37 PM UTC-6 [email protected] wrote: > Hello Dan, > > The density of the triangles in the contact mesh will not affect the > density of the BCE makers since the BCE markers are placed with the same > spacing as the fluid domain. To represent short and thin grousers, you > would need to reduce the spacing to resolve the features of your mesh. For > example, if you had a grouser thickness of 2 cm, you would need to have a > spacing of at max 1 cm to get three layers of BCE markers for your grouser. > > That being said, I would highly recommend using a algorithmic approach to > generating the markers or using an external tool to go from mesh to > markers, because the Chrono function to go from mesh to markers is not the > most robust. In this demo you will find an example of an algoirthmic > approach to generating the BCE markers - > > https://github.com/projectchrono/chrono/blob/7e03e3b0ab5d9c1eb6d9f23429102ae474370013/src/demos/fsi/demo_FSI_SlopedSingleWheelTest.cpp#L134 > > <https://github.com/projectchrono/chrono/blob/7e03e3b0ab5d9c1eb6d9f23429102ae474370013/src/demos/fsi/demo_FSI_SlopedSingleWheelTest.cpp#L134> > Using something like this ensures that your BCE marker spacing is correct > and your wheel shape is accurately captured. You can also make the wheel > hollow. > > Best > Huzaifa > > > On Tuesday, November 18, 2025 at 5:12:36 PM UTC-6 Dan Fenn wrote: > >> Hi all, >> >> Is there any documentation available regarding general guidance >> concerning BCE markers? >> >> I'm setting up a CRM terrain simulation using the test rig demo, but >> replacing the wheel/tire with my own model. I can generate a triangle >> contact mesh for the new tire. I see that the test rig code is >> automatically generating BCE markers based on the contact mesh. Does the >> density of BCE markers significantly impact the solution accuracy? If so, >> does changing the triangle density of the mesh affect the density of BCE >> markers? My wheel has short, thin grousers, and I want to make sure that >> these are adequately represented by the markers. >> >> Also, the wheel is essentially a hollow cylinder, and I notice that the >> entire interior portion is being filled with BCE markers. I'm not certain >> these are necessary, or if they significantly affect performance, but if >> I'm able to increase performance by removing them, I'd like to do that. >> >> If there's existing documentation that addresses these questions, I'd >> appreciate being pointed to it, as I was unable to find it. Otherwise, I >> appreciate any insight you can give me. >> >> Thanks, >> Dan >> > -- 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 visit https://groups.google.com/d/msgid/projectchrono/24f49339-05b5-44d8-b156-8ab580cb7c6fn%40googlegroups.com.
