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How to set the boundary of user-defined-scalar at a wall?

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Old   November 3, 2009, 01:31
Default How to set the boundary of user-defined-scalar at a wall?
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Yang Xiaoguang
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Dear all,

I want to set the gradient of one user-defined-scalar at a wall to be zero; how can I make it?
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Old   November 3, 2009, 10:27
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choose specified flux as boundary condition and set it to zero.

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