Re: [Yade-users] numerical stability ?

Bruno Chareyre Fri, 21 Jun 2013 06:55:05 -0700

Hi Mattias,
Please open questions through the launchpad interface, they are easier to track. https://answers.launchpad.net/yade/+addquestion
When you say same initialization you mean same initial positions, right?
If so, I would guess you run yade multithreaded (http://www.mail-archive.com/[email protected]/msg03562.html).
Running yade in single thread will make the numerical error always the same, it will not reduce it. The only solution would be to replace double by quadruple-precision numbers...

Bruno

On 21/06/13 16:37, Matthias Frank wrote:

hello,

i tried to modell rice, flowing out of an hopper. the modelling works fine and the results looks the same as my high speed camera video of this real experiment.

While analysing the results, I get some noise. The plot shows the fill height dirung the rice flowing out of the hopper. These simulation runs done with the same initialization. I guess this is the numerically inaccuracy while solving the differential equation. is there any option to reduce this error, except for running replications?

matthias
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Dipl.-Inf. Matthias Frank
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Re: [Yade-users] numerical stability ?

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