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Problem to converge a Reaction engineering, Diluted species transport and laminar flow coupled system.

Posted 27 nov. 2013, 03:06 UTC−5 Fluid & Heat, Chemical Reaction Engineering, Geometry, Mesh, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 4.2, Version 4.2a 0 Replies

Farhana Tisa
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I want to degrade one component in a 3D geometry along with diluted species transport and laminar flow in it. My simulation runs okay in stationary study (i used step function here). But when i want to use time dependent study on 3D it shows many errors and failure to find initial values or failure to evaluate variables.

I was wondering that, may be i have used a wrong solver. The concentrations of the species in reaction engineering works easily with time dependent study but i am unable to converge when i synchronize with mass and momentum.

So this time i thought of using time dependent,fixed geometry as my solver. and it is taking infinite time to solve. Am i following the currect way? Is it possible to solve with time dependent fixed geometry? as i used 3d geometry for my laminar flow and tranport diluted species.

FYI: I am using 4.2v of COMSOL.

Please contribute your comsol knowledge. I will be grateful.
0 Replies Last Post 27 nov. 2013, 03:06 UTC−5
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Hello Farhana Tisa

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