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-   -   plasma modeling (http://www.cfd-online.com/Forums/fluent/91654-plasma-modeling.html)

miroslav1312 August 18, 2011 03:16

plasma modeling
 
Can anybody help me with modeling of plasma in fluent?i try to define external transport equations,but i dont know how to assign some diferential operators to the macros in fluent,for example,laplace-nabla^2,derivative,rotation of vector,and divergence of tensor,

thank u

Amir August 18, 2011 06:21

You can involve extra transport equations via UDS in FLUENT.

miroslav1312 August 18, 2011 07:10

transport equations
 
thank u but i do it via UDS and UDF,the problem is how to define some mathematical operators to UDF ,for example lapace ,rotation of the vector and divegence of the tensor and UDF manual is not sufficient for this..

Amir August 18, 2011 11:28

Quote:

Originally Posted by miroslav1312 (Post 320605)
thank u but i do it via UDS and UDF,the problem is how to define some mathematical operators to UDF ,for example lapace ,rotation of the vector and divegence of the tensor and UDF manual is not sufficient for this..

Dear miroslav,

I don't think that such operators would be accessible via UDF ... (that's great if you can find them).
But maybe it would be possible to implicitly use UDS term to model your desired terms with some changes; e.g, diffusion term as laplacian, convection as divergence ... you may simplify other terms to achieve set of scalar equations and then use UDSs.
If non of these suggestions work, it's better to switch to openFOAM where you would be completely free to define equations.:cool:

Bests,


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