Hi, The GPU module does benefit a lot from more recent hardware. If your test case does not feature a huge number of bodies, say some 10k, then multicore can be a good choice. It probably requires less learning from you too.
It should be noted that Chrono::GPU is not "Chrono on GPU". Most Chrono core classes and methods cannot be used in Chrono::GPU. For all purposes, Chrono::GPU can be seen as a standalone DEM solver for monodisperse spherical particles, implemented on GPU. It should be used to simulate granular materials, and it can interact with Chrono (core) so that it becomes possible to bring a small number of more complex objects (such as your spoon) into the simulation as well. So if you would like to use Chrono::GPU, you have to start from its demos, to learn how to use its own methods to instantiate and manage granular particles. Chrono::GPU's main advantage is being fast. If your simulation has to involve millions of granular particles, then multicore will not do and GPU is the choice. More specifically, *CreateCylindricalContainerFromBoxes* is not a Chrono::GPU thing at all. *cohesion_ratio* is about the cohesion between Chrono::GPU particles, and it has nothing to do with gravity, which is set by *SetGravitationalAcceleration* in Chrono::GPU. On a different note, Chrono's DEM/granular support on GPU is moving towards a new direction. The support for complex granular particle shapes will be added and it will become a duo-GPU solver. It will be based on SBEL's new DEM Engine <https://github.com/uwsbel/DEM-Engine>. Apart from being more general and having higher efficiency, the usage of it is similar to Chrono::GPU, as a standalone helper to Chrono core which manages the granular part of the simulation, or work on its own as a dedicated DEM solver. If from the previous conversation you believe Chrono::GPU is for you, then likely this package will be of interest. More documentations and user guides are being added to it. But again, it does benefit from recent GPUs though. Thank you, Ruochun On Sunday, September 18, 2022 at 2:13:24 AM UTC-5 [email protected] wrote: > hello there, > I am tring to perform a simulation which I want to put an object like a > spoon and scoop the sand(granular objects) to see the force in the process. > I find that demo_GPU_mixer.cpp demo can be referenced, but I am not sure > whether I need to add a container holding those sand and give the granular > objects gravity. If this is so, should I use > *CreateCylindricalContainerFromBoxes* to add container and use > *cohesion_ratio* in the .json to add the gravity? Also, I am sad that I > have a poor GPU so that it really take a long long time to run the gpu > module. > Then I find that there are also some granular objects demos in the > multicore module, I find some demos about a container with granular > material. And I can run those demos faster. > Now I am confused about what thing to do next is much better. > > Any help will be appreciated, thank you so much in advance. > -- 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/24711575-3a37-47bd-a580-e26a43c5a86an%40googlegroups.com.
