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unsteady species transport

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Old   December 19, 2003, 19:06
Default unsteady species transport
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I am simulating unsteady(pulsatile) laminar flow with species transport in a tube. I am implementing segregated solver with species transport selected in Fluent 6.1.

The problem I encountered is the species profile in the flow domain at different time steps I found them zero even if at inlet there is a well defined non zero species concentration.

The same problem for steady state case gives a reasonable result.

I wonder if there is some procedure missed in the unsteady simulation.

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