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Problems calculating flow through porous domain

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Old   March 8, 2017, 06:14
Default Problems calculating flow through porous domain
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Tim
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Hi all,

I have some problems calculating a simple flow through a porous domain. I've ran my simulation both with Fluent and CFX. While Fluent solved my problem without any circumstances, CFX showed me a floating point exception at the first timestep (with a default setup). When I activate the Local Timescale Factor and set it to 0.01, CFX runs too. however, the speed of convergence is massively slower...
I found out that the higher I set the resistance in porous domain the smaller I have to set the timescale factor. Is it because of the high pressure gradient? A finer mesh didn't change anything...

Does anyone have experiences in this or a clue?

Thanks,
Tim
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