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Time dependent solver yields different results under same conditions

Posted 03.04.2012, 12:26 GMT-4 Porous Media Flow, Chemical Reaction Engineering Version 4.2 0 Replies

Hemant Kumar
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Hello all,

I am running a model which utilized 4 chpm equations (Species transport in porous media) with 4 darcy flow equations.

I am running my model for 30 years (~1e9 seconds). The problem is if I initialize the time dependent solver with all dependent variable as zero, it would not converge for this large time range. So I am doing it step wise manner.

First I run my model for 1 year and then use the solution as an initial condition for 10 years and finally use 10 years solution as an initial condition for 30 years. So the combination is T=0->1year->10years->30years

If I change this combination to T=0->5years->15years->30. The solver yields different results. I am using a time step of 1000s for whole analysis.

Please help me to understand the issue.

Thanks in advance.
0 Replies Last Post 03.04.2012, 12:26 GMT-4
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Hello Hemant Kumar

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