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Non zero gradient on symmetry axis

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Old   July 25, 2013, 10:44
Default Non zero gradient on symmetry axis
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Hi Foamers !

I am trying to simulate the pyrolysis of a piece of wood. I use a 2D axisymmetric mesh.

I have a problem on the axis : there is a non zero pressure and temperature gradient (see on the pictures). This gradient pushes heat through the axis. It leads to a sink of heat and momentum.

I have tried several boundary condition on the axis : symmetryPlane, empty, zeroGradient. None of these solved my problem. I have changed several numerical scheme. I was not luckier there.

Best regards,
Nathanael.
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File Type: jpg Symmetry_axis_2.jpg (41.4 KB, 13 views)
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Old   August 3, 2013, 17:54
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Bump ??

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Old   August 14, 2013, 16:36
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Up ! Up ! Up !

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