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Forum: Main CFD Forum

January 26, 2012, 10:10

Replies: 5

Mass transfer: negative concentrations

Views: 1,914

Posted By andreasp

Yet another thought: Suppose I stay with the...

Yet another thought:

Suppose I stay with the original formulation of the equations (i.e. in terms of c, not logc). How about simply cutting off all negative values after each iteration? Would this...

Forum: Main CFD Forum

January 26, 2012, 10:03

Replies: 5

Mass transfer: negative concentrations

Views: 1,914

Posted By andreasp

Yes, my problems are highly convection dominant. ...

Yes, my problems are highly convection dominant.
For the simulations I use a first order Galerkin method which is stabilized by an SUPG-like least squares technique. In general this works fine,...

Forum: Main CFD Forum

January 12, 2012, 02:48

Replies: 5

Mass transfer: negative concentrations

Views: 1,914

Posted By andreasp

Mass transfer: negative concentrations

Hi all!

I simulate mass transfer problems by solving advection-diffusion (and possibly reaction) equation with a finite element method.

Numerical instabilities and insufficient mesh resolution...

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