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Steady scalar transport

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Old   August 31, 2005, 08:13
Default Hi, I attempted to create a
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Andrew Heather
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Hi,

I attempted to create a very simple steady state solver for scalar transport to test the various div schemes. However, I've been getting some strange results...

I've attached the solver and a little test case - is just a unit square, pure convection, with a uniform flow from south-west to north-east, and the scalar is set to 1 on the west and north, and 0 on the south and east (all fixed value). The solution appears to converge, but instead of the one-way transition of the scalar from 0 to 1 across the north-west to south-east diagonal, I'm seeing a 'pocket' in the north-east corner...

steadyScalarTransportFoam.tar

test1010_upwind.tar

Any comments are appreciated

Andy
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Old   August 31, 2005, 08:26
Default Just a question. Is the pro
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Niklas Nordin
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Just a question.

Is the problem well-posed if you specify properties on outlet boundaries?

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Old   August 31, 2005, 08:44
Default Good point - no... changed
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Andrew Heather
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Good point - no...

changed outlets to zeroGradient for U/T and behaving more as expected.

Thanks,

Andy
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