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Re: [ESPResSo-devel] incorrect velocity scaling for slip lbboundary
From: |
Kai Szuttor |
Subject: |
Re: [ESPResSo-devel] incorrect velocity scaling for slip lbboundary |
Date: |
Fri, 8 Dec 2017 11:08:58 +0100 |
User-agent: |
NeoMutt/20170714-126-deb55f (1.8.3) |
Hi Ivan,
I just checked your test with GPU LB and there the velocity comes out
correct, so it seems to be a problem of CPU LB.
I'll have a look.
Cheers,
Kai
On Fri, Dec 08, 2017 at 08:56:03AM +0000, Ivan Cimrak wrote:
> Hey guys,
>
>
> Is it possible to have incorrect velocity scaling for slip boundary
> conditions? I took an example script (attached) from section "10.10. Setting
> up boundary conditions" from ESPResSo online documentation:
>
> http://espressomd.org/html/doc/lb.html
>
> I added the printing of the velocity near the right slip wall and after
> reaching steady state it shows almost 100 times larger velocity as it is
> supposed to be (0.941 or so instead of 0.01). This behaviour is linked with
> lb timestep which was 0.01. Increasing to timestep=0.1 gives only 10times
> higher velocity.
>
>
> Could you comment on this?
>
>
> Many thanks,
>
> Ivan
>
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