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Re: [ESPResSo-devel] lbboundary and slitpore constraint

From: Georg Rempfer
Subject: Re: [ESPResSo-devel] lbboundary and slitpore constraint
Date: Thu, 12 Feb 2015 11:10:25 +0100

What do you mean by slit pore? If you mean parallel plates, my previous answer still holds:

>> Is there a way to use lb fluid in slitpore? While I tried this the simuation gave error that lbboundary does not accept the slitpore parameter.
>Yes. Read the User's Guide about lbboundary wall

My suggestion to implement your boundary geometry in the C code was meant for more complicated geometries.

>> Is there a way to simulate lb fluid in only specific custom defined boundaries? Like a U-tube.
>Yes. You might be able to construct your channel from several cylinder boundaries. If not you would have to implement a distance function for your boundary shape in the C code.

On Thu, Feb 12, 2015 at 7:33 AM, Harmanjit Singh <address@hidden> wrote:
Dear all,
I have been using Espresso for a month now, I need it to see slitpore as LB BOundary, which is already not accepted as a valid LB boundary. So on suggestion of Georg Rempfer, I tried changing the source codes of the files, i went through the file_1013.pdf by Alex Arnold and then changed the LB boundaries.cpp and Lb boundaries.hpp and there Tcl counterparts. I am not professional coder, but after few tries I got the program to make and make install. It gives no errors now when I passed the slitpore as parameter to the lbboundary command. however I am not really sure it worked because the velocity is always zero when viewed via lbnode.
Is there something that I am missing or something more that needs to be done?
Thank You and Regards
PS. Please let me know how and where to upload those changed files.

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