[nwpukaka]

Hello,

The data for my nonuniform boundary condition is calculated from external program, and saved in a .dat file. Is is possible to read this data when setting nonuniform boundary conditions, just like:

n0000
{
type fixedGradient;
gradient nonuniform List<scalar>
boundary.dat
}

Thank you in advance.
Kan

[Mitchell Baum]

Hi Kan,
I wish to also implement a non-uniform BC from a CSV file, however as a beginner in OF, I am finding it difficult to find an example of this in laymen's terms. Have you made any progress on this?
Regards,
Mitchell

[yongxiang]

Hi Mitchell,
I am also run into this kind of problem, do you have any idea now?
For my purpose, I want to prescribe a Blasius solution as my boundary condition. The data can be generated by a Matlab code, and export as an external data for OpenFOAM. Then compile a utility that interpolate and map the data onto the inflow patch. But, however, this would be time consuming, since I am also beginner of OF. Do you have any better idea now?
regards
Yongxiang

[Antimony]

Hi,

This feature has been available in OF since version 2.1.

Here is the link describing how to go about it: http://www.openfoam.org/version2.1.0...conditions.php

If this doesn't suffice, perhaps you can look at swak4Foam as well.

Hope this helps.

Antimony

[yongxiang]

Hi Antimony,
thank you very much for your quick reply. I've checked the page you suggested. And still I am not sure how should my data get prepared. For example, If I use TableFile, the indicated format for the data is:
(
(0.0 (1 2 3))
(1.0 (4 5 6))
);
There is no explanation of what the scalar and vector are. I suppose the scalar to be time, and the scalar to be Velocity.

For my purpose, I want to prescribe a profile, which means the coordinates are also involved. But in the above data format, no coordinates are mentioned. So Do you know what specific data format should be?
Regards
Yongxiang

[Antimony]

Hi,

I guess the link that I shared was a common answer to the three queries on this thread, each of which was connected but are different.

Take note that the link refers particularly to time-dependent boundary conditions.

In your case, I would think something like the capabilities offered by swak4Foam would be more relevant. Here is a link to it: http://openfoamwiki.net/index.php/Contrib/swak4Foam

Hope this helps

Antimony

P.S: Here is another post that might be relevant: http://www.cfd-online.com/Forums/ope...tml#post568000 talking about timeVaryingMappedFixedValue