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What is the difference between fixedGradientFvPatchFields and fixedValueFvsPatchField

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Old   February 2, 2014, 03:28
Default What is the difference between fixedGradientFvPatchFields and fixedValueFvsPatchField
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when i was working with CHTmultiregion foam i came across fixedGradientFvPatchFields
and previously i was working with compressible TwophaseEuler Foam which had
fixedValueFvsPatchField

can anyone kindly explain me its difference
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Old   February 2, 2014, 08:01
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fixedGradient=Neumann, fixedValue=Dirichlet.
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Old   February 2, 2014, 09:03
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In addition to this, the "Fv" boundary condition is for volume fields, whereas the "Fvs" boundary condition is for surface fields.

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Niels
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Old   February 2, 2014, 09:55
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Thanks a lot, as i am planning to combine both the compressible two phase euler Foam and CHTis threre any method to domain decompose by Neumann–Dirichlet method in openfoam,
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Old   February 2, 2014, 14:46
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this BC is exist now
mixedFvPatchField boundary condition provides a base class for 'mixed' type boundary conditions, i.e. conditions that mix fixed value and patch-normal gradient conditions
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Old   February 3, 2014, 10:33
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thank you, i found the solvers using patches(especially in kinetic model of compressible euler foam) . i suppose it is used only in case when taking surface field into consideration(kindly correct me if i am wrong). So can this solver be developed by taking volume fields into consideration ??
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