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fixedGradient BC - patch normal direction

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Old   July 18, 2019, 05:44
Default fixedGradient BC - patch normal direction
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Howdy Foamers:

I am wondering which way the patch normal of the fixedGradient BC is heading, into the flow domain, or point out of the flow domain?

Thanks in advance, Gerry.
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Old   July 31, 2019, 05:24
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Howdy folks:

I managed to run a very quick test. Indeed, the gradient acts in the direction of the normal, and the normal is positive pointing out of the boundary patch.

Gerry.
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