Hi, I see, great. It looks alright to me now. To resolve that, can you please try what's in this post <https://groups.google.com/g/projectchrono/c/9nfHAobymzM> and let us know how it works. The short version is Go to the file *ChGpuDefines.h* (in chrono\src\chrono_gpu), and replace *#define MAX_SPHERES_TOUCHED_BY_SPHERE 12* by *#define MAX_SPHERES_TOUCHED_BY_SPHERE 20* or some even larger number (for you, you may need something like 24? 30?). Rebuild it and run your script.
I took a look at your tip mesh, and that falls exactly into the "a sphere sitting on the tip of a needle" category, and I suspect a sphere contacting with too many mesh facets is the cause. It makes sense because if you reduce the stiffness, the penetration gets higher and it potentially worsens the problem. Another suggestion is that if possible, you should create a cone mesh that has less slender elements near the tip. It affects the shape little but can be a big help to the simulation. It should be easily doable with the CAD tool you used to create the meshes. Thank you! Ruochun On Monday, July 4, 2022 at 1:28:26 PM UTC-5 [email protected] wrote: > Hi, > > Thank you so much for your help. I really appreciate it. I will definitely > rebuild Chrono again using the latest version and will let you know if any > changes occur. For the cone, I have implemented a motor that ensures a > constant velocity of the cone. My understanding is that the motor applies > as much force as needed to maintain a constant velocity of the cone which > is the reason why the cone does not stop in the bed. I have generated > another video using ParaView ( > https://drive.google.com/file/d/1q-hgTcJY62kLblqr37sFoHX-4goOwbzR/view?usp=sharing) > > and it shows that the cone pushes the particles away as it moves. Also, non > of the particles get inside the cone. I have included the .cpp file needed > to run this simulation to avoid any confusion. > > Forgive me I had to upload the video as a link due to size limitations for > the post. > > Thank you so much for your help and please let me know if there is > anything else you want me to provide to you, > > Mohammad, > > -- 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/9fc3aa46-7731-42f0-9f05-b0ad71e11155n%40googlegroups.com.
