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-   -   How to transform boundary condition from 3D to 2D? (http://www.cfd-online.com/Forums/main/108246-how-transform-boundary-condition-3d-2d.html)

nurul efha October 18, 2012 00:23

How to transform boundary condition from 3D to 2D?
 
Hello everybody,

I'm using CFD-Fluent to simulate gasification. In my case, mass flow rate that enter gasifier column is 0,0074 kg/s of coal. I want to simulate with 2D geometry. Only half of the domain with is modeled because of symmetry. Is it same the number of mass flow rate in 3D and 2D? Is the mass flow rate used in 2D unchanged (0,0074 kg/s)? Or the mass flow rate must be devided to transform in 2D? I hope you can help me. Thanks.

agd October 18, 2012 09:45

The easiest approach is to compute the mass flux (mass flow/area) and then use that to determine what the mass flow rate would be on the modified inlet areas. In other words, scale the mass flow by the ratio of the areas.

nurul efha October 18, 2012 22:51

Thank you very much. I will try it.


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