Hi Weigang, I would like to answer Question 2 first. You can use variables *AOwnerFamily *and *BOwnerFamily *to refer to clump (or owner) A's and clump B's family numbers directly in the force model. So you can write *if *statements that treat each case accordingly. This is mentioned in the DEME paper: You can check out Table 2.
For Question 1, the situation is more complicated. We are actually able to reproduce the problem you encountered (simulation freezing), but on consumer/gaming cards only. It runs perfectly on data center cards and that's what we used for generating this experiment, therefore it did not appear a problem for us. It's likely due to different GPU architectures running the same code differently, we'll try to find a solution and let you know in the following days, so stay tuned. By the way, you are using a gaming card to run the simulations, correct? Thank you, Ruochun On Friday, May 24, 2024 at 8:47:00 AM UTC+8 weigan...@gmail.com wrote: > Thank you for your reply! I have two questions about the demo > "DEMdemo-Fracture-Box". > > (1) After i have run this demo for one day, there is still nothing > outputed. Is it fact that the DEME will run a long time once a fracture > model is used? > > (2) How to tell DEME the contact force models between different familys? I > did not see any snippet which undertakes this work, although the demo has > at least two kinds of contact force model. The question i really want to > ask is that, if we have more than three familys in our model and there are > more than two familys consist of spherical particles, how to tell DEME the > contact force model between different familys, and tell DEME the contact > force model between the particles of a family in the same time. > > Thank you, > Weigang > > On Thursday, May 23, 2024 at 10:10:14 PM UTC+8 Ruochun Zhang wrote: > >> No. That's because the *sphere components* in a clump are just shape >> representations, and they have no physics, only material properties. If >> they did have interaction with each other then every clump would've >> immediately exploded upon simulation starting. >> >> Thank you, >> Ruochun >> >> On Thursday, May 23, 2024 at 12:16:32 PM UTC+8 weigan...@gmail.com wrote: >> >>> Hi Ruochun, >>> >>> Thank you for your reply! I have a question about the clump. Do the >>> particles in a clump interact with each other via any force model? >>> >>> Thank you, >>> Weigang >>> >>> On Monday, May 20, 2024 at 10:26:03 PM UTC+8 Ruochun Zhang wrote: >>> >>>> Hi Weigang, >>>> >>>> Yes. Again, DEME only cares about the position and radius of the >>>> initial spheres, so you can supply it however you want. If you have a file >>>> that records this information using your own format, then the easiest >>>> thing >>>> is to have your own C++ or Python script that reads it into arrays and >>>> then >>>> feeds them to the solver. If your file shares the format with DEME's >>>> standard clump output file, or your file is simply the output of >>>> *WriteClumpFile*, then you can conveniently load clump positions and >>>> orientations by *ReadClumpXyzFromCsv *and *ReadClumpQuatFromCsv *(examples >>>> are in GRCPrep_Part1 and 2). Note that currently, sphere radius cannot be >>>> read from standard clump output files since it's part of the clump >>>> template >>>> information thus not in the clump output. >>>> >>>> Thank you, >>>> Ruochun >>>> >>>> On Monday, May 20, 2024 at 12:56:56 PM UTC+8 weigan...@gmail.com wrote: >>>> >>>>> Hi Everyone, >>>>> >>>>> I would like to generate a block which consists of a assembly spheres. >>>>> Is it possible to generate the block by other code, and then load it into >>>>> DEM-Engine via a file containg the informations (such as position and >>>>> radius) of the spheres? >>>>> >>>>> Thank you, >>>>> Weigang >>>>> >>>> -- 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 projectchrono+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/c73a499b-8e97-4f1d-bfc1-c65ec75aea85n%40googlegroups.com.
