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[Liqing Jiao <question186108@xxxxxxxxxxxxxxxxxxxxx>]

Question #186108 on Yade changed:
https://answers.launchpad.net/yade/+question/186108

    Status: Answered => Open

Liqing Jiao is still having a problem:

Dear Anton,

I am sorry I can't download BZR from the yade website, it always show up
the errors. And my computer tends to spend two days to download, and the
end it showed the error. Could you please help me check it? Thank you
very much.

By the way, I want to ask another question about the packing. I want to
try different packing with same parameters (the model geometry and the
particle size). When I re-pack my model without any change, Is the
packing changed or not. I found when I re- pack it, the packing time is
shorter than first packing. So I wonder it. Could you please help me?
Thank you very much.

Best Regards, Liqing



At 2012-02-18 14:41:05,"Anton Gladky" <question186108@xxxxxxxxxxxxxxxxxxxxx> wrote:
>Question #186108 on Yade changed:
>https://answers.launchpad.net/yade/+question/186108
>
>    Status: Open => Answered
>
>Anton Gladky proposed the following answer:
>Hi Liqing,
>
>2012/2/18 Liqing Jiao <jiaoliqing@xxxxxxxx>:
>> ....
>> I use yade-0.70.0. I think it should be very new. I just updated last month.
>
>Not quite, this feature was added after 0.70 release. You should use yade-daily
>version of yade to have it or download it from BZR. Or just wait a
>little bit, we will probably release a newer version soon. I hope.
>
>> About "How many bodies are participating in your simulation? If it is less
>> than, for example, 10 000, it will not be effective to use all 32 cores."
>> you said, does it mean that the more particle more cores will be better,
>> right? What relationship between the particle amount and the cores?
>
>Well, I can only say it from my experience and discussion the similar
>problem with other DEM-guys from another software (esys-particle). And
>it strongly depends on type of your simulation and number of
>interactions (how many active contacts you have).
>
>Roughly saying, you should have minimum 10 000 particles/core. Maybe
>somebody else give you more precise answer.
>
>Anton
>
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