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Distribution of concentration of species that depends on velocity field
Posted 25 juin 2013, 09:59 UTC−4 Computational Fluid Dynamics (CFD) 0 Replies
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As a next step, I put a concentration of a species at the inlet and want to investigate how the fluid field transports the species across the geometry. I solve this in a stationary study as well.
Next, however, I want to take into account that the concentration of my species varies across the geometry. In the x direction, this variation is given by
(change in concentration) = -(some constant) * exp(some constant) * dx / (velocity in x direction)
, where dx is a small step in the x direction. The change in the y direction is the same, only with x substituted for y.
Clearly, this is a function of my computed velocity field. Now the question is: how can I setup such a function so that I can use it for further studies in my COMSOL model?
I have tried to this with adding an analytic function, but I cannot figure out how to access the components of the computed velocity field as an input to a function.
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Hello sebastian
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