Hi Ruochun， Thank you for your reply! The reason why i tryed to run the DEMdemoFractureBox demo is that i would like to model rock breakage in my case. From your paper published in Computer Physics Communications, i noticed that you have achieved the uniaxial compression test of rock. Could you share the code with us?
By the way, i have three questions needing your help. (1) For my case, i would like to model the sliding and framentation of many rock blocks. So, how to generate a assembly of brakeable rock blcoks? In particular, how to generate a irregular shaped rock block which consists of sphere elements? (2) If we finished our own code, where and how to generate a executable code? (3) If we modified the DEM-Engine source code, such as if we add a force model, how to reconfigure the DEM-Engine? Thank you, Weigang On Wednesday, May 15, 2024 at 5:36:47 PM UTC+8 Ruochun Zhang wrote: > Most of the demos are quite large. This one particularly uses a fine step > size and depending on the hardware, it may take hours or days. I suggest > you wait longer. Or you can try out some other demos that I have > explanations for on the Git page. > > You don't necessarily need to run them. Just have a look at how the > methods I mentioned in the previous post are used in these demos to get an > idea on how you can use them. > > If you just want to know what a contact file may look like, then I happen > to have one stored in *data/sim_data/example_cnt_pairs.csv*. > > Thank you, > Ruochun > > On Wednesday, May 15, 2024 at 4:59:37 PM UTC+8 [email protected] wrote: > >> Hi Ruochun: >> >> Thank you for your reply! >> When i run the demo 'DEMdemoFractureBox', the runtime inerface is always >> like the figure below all the time. There is nothing outputed. >> Do you have any suggestion? >> [image: 微信图片_20240515165515.jpg] >> >> On Wednesday, May 15, 2024 at 2:18:01 AM UTC+8 Ruochun Zhang wrote: >> >>> Hi Dr. Shen, >>> >>> 1. I haven't added direct vtk output for sphere/clump information. They >>> are now written in csv format. But you can use your own tool to convert csv >>> to vtk. The information you need is all there. You can specify what goes >>> into the output file by calling the method *SetOutputContent* like the >>> following >>> *DEMSim.SetOutputContent({"VEL", "ACC"});* >>> >>> 2. Again, this is something you can derive from the simulation status, >>> but DEME does not have a one-liner to compute that. You can compute the >>> kinetic energy through the linear and angular velocities of each particle, >>> and compute the potential through the positions of each particle at >>> different points in time. The information can all be queried through >>> trackers. For the kinetic energy though, there is a convenient call to >>> compute that which is through inspectors >>> *auto KE_finder = DEMSim.CreateInspector("clump_kinetic_energy");* >>> You can find this example in the demo SingleSphereCollide. >>> >>> However, if you also need to know respectively the contribution of >>> friction and damping, this is more complex, and you need to write a custom >>> force model that records this information. This is an advanced usage and a >>> bit more challenging. I also find this not that meaningful in many >>> real-world DEM applications because the damping and friction coefficients >>> can be very heuristic anyway. >>> >>> 3. This can be written to a contact file. The method to use is >>> *WriteContactFile*. An example can be found in the demo GRCPrep_Part1 >>> or 2 or 3. You should also specify what goes into those contact files by >>> calling *SetContactOutputContent*. An example... >>> *DEMSim.SetContactOutputContent({"OWNER", "FORCE", "POINT", "COMPONENT", >>> "NORMAL", "TORQUE"});* >>> >>> If you have specific questions regarding using the methods, feel free to >>> ask. >>> >>> Thank you, >>> Ruochun >>> On Tuesday, May 14, 2024 at 1:52:27 PM UTC+8 [email protected] wrote: >>> >>>> Hi Ruochun, >>>> >>>> Thank you for your help again! I would like to ask some questions about >>>> the output data of dem-engine. >>>> 1. how to output a vtk file in which i would like to contain the >>>> position, radius, velocity and resultant force of particles. >>>> 2. how to output the energy dissipation, such as the energy dissipated >>>> by the interparticle friction and damping. >>>> 3. how to output the interparticle force which i would like to use to >>>> plot force chain. >>>> >>>> Thank you! >>>> >>>> On Monday, May 13, 2024 at 4:23:57 PM UTC+8 Ruochun Zhang wrote: >>>> >>>>> Oh right... Rebooting might be needed for completing the CUDA >>>>> installation, I forgot... >>>>> >>>>> Now you should be able to install pyDEME too, since the installation >>>>> environment issue is resolved. >>>>> >>>>> Thank you, >>>>> Ruochun >>>>> >>>>> On Monday, May 13, 2024 at 4:17:01 PM UTC+8 [email protected] wrote: >>>>> >>>>>> Hi Ruochun, >>>>>> After the reboot of my computer, the demo runs successfully. Thank >>>>>> you for your careful help! >>>>>> >>>>>> On Friday, May 10, 2024 at 3:06:30 PM UTC+8 Ruochun Zhang wrote: >>>>>> >>>>>>> Yes. This error was encountered during a *cudaGetDeviceCount *call, >>>>>>> which is the first GPU-related call when constructing a DEME simulation >>>>>>> object. So CUDA failed to get the number of devices. I don't know if >>>>>>> you've been having success running GPU-based applications on this >>>>>>> machine >>>>>>> but again, I suspect it can't run anything GPU-related, not limited to >>>>>>> DEME. Possible treatments include... >>>>>>> 1. The NVIDIA driver installed on your system is not compatible with >>>>>>> CUDA 12.0, or is corrupted. You probably want to ensure a correct >>>>>>> installation of a GPU driver first, if you haven't paid attention to >>>>>>> doing >>>>>>> that. >>>>>>> 2. You may want to check using *nvidia-smi* to see if the OS >>>>>>> recognizes the GPU at all. >>>>>>> 3. You should ensure that you have the permissions needed to access >>>>>>> GPUs. >>>>>>> >>>>>>> In short, ensure you have GPU access. It's still good to start from >>>>>>> a minimal CUDA example to debug, since it appears to be a basic >>>>>>> environmental issue. >>>>>>> >>>>>>> Thank you, >>>>>>> Ruochun >>>>>>> >>>>>>> On Friday, May 10, 2024 at 9:11:52 AM UTC+8 [email protected] >>>>>>> wrote: >>>>>>> >>>>>>>> Hi Ruochun, >>>>>>>> I have succefully configured the DEME after the reinstallation of >>>>>>>> CUDA. Thank you! It is indeed that the multiple times installation of >>>>>>>> CUDA >>>>>>>> induced the previours error. >>>>>>>> When I run the demo, there is an error like this. Do you have any >>>>>>>> suggestion? >>>>>>>> [image: 微信图片_20240510091101.jpg] >>>>>>>> >>>>>>>> On Thursday, May 9, 2024 at 7:08:28 PM UTC+8 Ruochun Zhang wrote: >>>>>>>> >>>>>>>>> To me, because CMakeCUDACompilerId.cu is a Cmake-generated minimal >>>>>>>>> example and it failed to compile, it looks like the compiler is not >>>>>>>>> configured properly and cannot compile anything. The solution is >>>>>>>>> probably >>>>>>>>> case-by-case. I am not familiar with the installation process of CUDA >>>>>>>>> enough to accurately remote-diagnose (but someone else here might >>>>>>>>> be). The >>>>>>>>> best you can do is to write a minimal CUDA example, test if it can be >>>>>>>>> compiled, and debug starting from there. However, I have a couple of >>>>>>>>> guesses... >>>>>>>>> 1. If you installed CUDA multiple times or had multiple trials >>>>>>>>> (like once from apt-get and then another time from a downloaded >>>>>>>>> file), >>>>>>>>> there can be conflicts. The nvcc in /usr/bin might be a symbolic >>>>>>>>> link, and >>>>>>>>> it could be linked against an executable that is not compatible with >>>>>>>>> the >>>>>>>>> CUDA toolkit. You might try to fix this symbolic link by linking it >>>>>>>>> against >>>>>>>>> that one in cuda-12.0/bin, or the one you think is correct. >>>>>>>>> 2. Just remove all installation of CUDA and start over. >>>>>>>>> 3. I don't know the GCC or Clang version you are using. It's not >>>>>>>>> likely, but it might be too old or too new to be compatible with >>>>>>>>> nvcc. GCC >>>>>>>>> 9.4 should be a version that works in most of my trials, in case you >>>>>>>>> wish >>>>>>>>> to give it a try. >>>>>>>>> >>>>>>>>> That is all I can think of at this point, thank you, >>>>>>>>> Ruochun >>>>>>>>> On Thursday, May 9, 2024 at 4:54:34 PM UTC+8 [email protected] >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> After press c to configure, there is also an error like this: >>>>>>>>>> [image: 5c8b56934e5f50fa728c05edc5b5ffd.jpg] >>>>>>>>>> >>>>>>>>>> On Thursday, May 9, 2024 at 2:27:59 PM UTC+8 Ruochun Zhang wrote: >>>>>>>>>> >>>>>>>>>>> Can you please press c to configure the project, so we might >>>>>>>>>>> know what is still missing for the project? If nothing goes wrong, >>>>>>>>>>> then try >>>>>>>>>>> pressing g to generate the project. >>>>>>>>>>> >>>>>>>>>>> Thank you, >>>>>>>>>>> Ruochun >>>>>>>>>>> >>>>>>>>>>> On Thursday, May 9, 2024 at 10:11:05 AM UTC+8 >>>>>>>>>>> [email protected] wrote: >>>>>>>>>>> >>>>>>>>>>>> I updated the cmake from 3.20 to 3.29, which made it find the >>>>>>>>>>>> nvcc. However, the ccmake GUI is empty now. >>>>>>>>>>>> [image: 微信图片_20240509100541.jpg] >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> On Thursday, May 9, 2024 at 3:36:40 AM UTC+8 Ruochun Zhang >>>>>>>>>>>> wrote: >>>>>>>>>>>> >>>>>>>>>>>> It looks like it found the compiler nvcc this time, but it's >>>>>>>>>>>> not working correctly... How did you make it find nvcc in >>>>>>>>>>>> */usr/bin* this time? I thought you had nvcc in another >>>>>>>>>>>> location last time. You re-installed? And can you show the ccmake >>>>>>>>>>>> GUI this >>>>>>>>>>>> time as well? >>>>>>>>>>>> >>>>>>>>>>>> Ruochun >>>>>>>>>>>> >>>>>>>>>>>> On Wednesday, May 8, 2024 at 5:16:58 PM UTC+8 >>>>>>>>>>>> [email protected] wrote: >>>>>>>>>>>> >>>>>>>>>>>> Hi Dr. Zhang, >>>>>>>>>>>> >>>>>>>>>>>> I still encountered a error like this. Do you have any >>>>>>>>>>>> suggestion? >>>>>>>>>>>> >>>>>>>>>>>> Thanks! >>>>>>>>>>>> [image: a391d46ae4497f81bd18b7e111b4842.jpg] >>>>>>>>>>>> On Tuesday, May 7, 2024 at 8:20:57 PM UTC+8 Ruochun Zhang wrote: >>>>>>>>>>>> >>>>>>>>>>>> Doesn't look like it finds a CUDA compiler at all. It appears >>>>>>>>>>>> that /usr/bin is checked but it's not found there. Please make >>>>>>>>>>>> sure your >>>>>>>>>>>> CUDA installation is in PATH. Maybe the troubleshooting part of >>>>>>>>>>>> this >>>>>>>>>>>> section >>>>>>>>>>>> <https://github.com/projectchrono/DEM-Engine?tab=readme-ov-file#compilation> >>>>>>>>>>>> >>>>>>>>>>>> of DEME manual can help you. >>>>>>>>>>>> >>>>>>>>>>>> Thank you, >>>>>>>>>>>> Ruochun >>>>>>>>>>>> >>>>>>>>>>>> On Tuesday, May 7, 2024 at 7:14:18 PM UTC+8 [email protected] >>>>>>>>>>>> wrote: >>>>>>>>>>>> >>>>>>>>>>>> The ccmake GUI and the configure error are shown below. I do >>>>>>>>>>>> not see anything related to CUDA_ARCHITECTURES or CUDA_PATH. >>>>>>>>>>>> [image: 微信图片_20240507191053.jpg] [image: >>>>>>>>>>>> 微信图片_20240507191047.jpg] >>>>>>>>>>>> >>>>>>>>>>>> On Tuesday, May 7, 2024 at 6:12:11 PM UTC+8 Ruochun Zhang wrote: >>>>>>>>>>>> >>>>>>>>>>>> Looks all good. Please show your ccmake GUI when configuring >>>>>>>>>>>> the project: You may see in there a few missing items that the >>>>>>>>>>>> autodetection failed to identify. Could be CUDA_ARCHITECTURES or >>>>>>>>>>>> CUDA_PATH >>>>>>>>>>>> related. >>>>>>>>>>>> If this is the case, then we may help you fill them out >>>>>>>>>>>> manually. >>>>>>>>>>>> >>>>>>>>>>>> Ruochun >>>>>>>>>>>> On Tuesday, May 7, 2024 at 5:23:14 PM UTC+8 [email protected] >>>>>>>>>>>> wrote: >>>>>>>>>>>> >>>>>>>>>>>> Hi Dr. Zhang: >>>>>>>>>>>> >>>>>>>>>>>> The versions of cmake and cuda, and the model of GPU are shown >>>>>>>>>>>> below. >>>>>>>>>>>> >>>>>>>>>>>> Thank you! >>>>>>>>>>>> [image: 微信图片_20240507171644.jpg] >>>>>>>>>>>> >>>>>>>>>>>> On Tuesday, May 7, 2024 at 4:50:27 PM UTC+8 Ruochun Zhang wrote: >>>>>>>>>>>> >>>>>>>>>>>> Hi Dr. Shen, >>>>>>>>>>>> >>>>>>>>>>>> A couple of questions: What is your cmake version, what is your >>>>>>>>>>>> CUDA version, and what model is the GPU you have on your system? >>>>>>>>>>>> >>>>>>>>>>>> Thank you, >>>>>>>>>>>> Ruochun >>>>>>>>>>>> >>>>>>>>>>>> On Tuesday, May 7, 2024 at 8:37:47 AM UTC+8 [email protected] >>>>>>>>>>>> wrote: >>>>>>>>>>>> >>>>>>>>>>>> Hello everyone, >>>>>>>>>>>> >>>>>>>>>>>> When i build the c++ DEME, there is an error as shown in the >>>>>>>>>>>> figure below. >>>>>>>>>>>> >>>>>>>>>>>> Coould anyone give me a help? >>>>>>>>>>>> >>>>>>>>>>>> Thanks![image: 微信图片_20240507083122.jpg] >>>>>>>>>>>> >>>>>>>>>>>> -- 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/23027df8-326a-4c74-a25f-4b1c69a16b18n%40googlegroups.com.
