[nwpukaka]

Dear OpenFoamer,

I want to set the nonuniform fixedGradient to a boundary patch, the value of this nonuniform fixeGradient is from other software, and is saved in a file, so how can I set this kind of boundary condition in OpenFoam, and is there any examples?

Thank you in advance.
Kan

[nimasam]

search in forum for read file with groovyBC

[jhoepken]

You could also just write a custom boundary condition (inherit from fixedGradient) that reads the input data from a file and maps that to the respective boundary faces.

[nwpukaka]

Originally Posted by nimasam

search in forum for read file with groovyBC

Hi Nima,

Thank you for your hint, I think this thread: http://www.cfd-online.com/Forums/ope...le-values.html provides some useful information about how to implement my request.

Cheers

[nwpukaka]

Originally Posted by jhoepken

You could also just write a custom boundary condition (inherit from fixedGradient) that reads the input data from a file and maps that to the respective boundary faces.

Hi Jens,

Is there any example how to modify the boundary condition in OpenFoam?

Cheers
Kan

[fabian_roesler]

Hi

You could also use the BC timeVaryingMappedFixedValue. This boundary conditions interpolates the values from a set of supplied points in space and time. Supplied data should be specified in constant/boundaryData/<patchname>. Never used it by my self though. Check this link:

http://foam.sourceforge.net/docs/cpp...8.html#details

Cheers

Fabian

[nwpukaka]

Hi Fabian,

Thank you for your kind reply, I have a quick look at timeVaryingMappedFixedValue BC, It will define data at each points, but my input data is face centre data.

Cheers,
Kan