Hi Ruochun,

My card is indeed a gaming card NVIDIA GeForce RTX 2070 Super. Could you 
recommend a card?

Thanks,
Weigang

On Saturday, May 25, 2024 at 10:44:17 PM UTC+8 Ruochun Zhang wrote:

> 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
>>>>>>
>>>>>

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