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divScheme for recirculating flows

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Old   October 6, 2013, 13:50
Default divScheme for recirculating flows
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Bobi
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Dear Buddies

In my case, flow has recirculation zones (cause its a bluff-body stabilized flow). which scheme do you prefer for the following divergence operations:

div(phi,U)
div(phiU,p)

My flow field must have both positive and negative values together in the 3-D domain.
My suggestion is Gauss upwind.

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Bobi
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Old   October 7, 2013, 12:05
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Tom Fahner
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Dear Bobi,

Upwind will be way too diffusive, might even remove the recirculation zone at all. I would suggest to use one of the TVD schemes like Gamma. Please have a look in the user guide. limitedLinear or linearUpwind would also be 'standard' candidates.

Best would be to try and see what works best, maybe for a smaller but similar problem in order to save time.

Regards,
Tom
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Old   October 8, 2013, 01:05
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Bobi
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Hi Tom

Thanks for your reply; Actually I tested upwind and limitedlinear and as you have mentioned The result was much better stability for limitedlinear scheme.


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Bobi
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