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advectiveFvPatchField, waveTransmissiveFvPatchField: Updated docs

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Resolves bug-report http://bugs.openfoam.org/view.php?id=2373
This commit is contained in:
Henry Weller
2016-12-05 20:07:40 +00:00
parent 94fd633243
commit 6eeba45c21
2 changed files with 7 additions and 5 deletions
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5
src/finiteVolume/fields/fvPatchFields/derived/advective/advectiveFvPatchField.H
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@ -29,7 +29,8 @@ Group
Description Description
This boundary condition provides an advective outflow condition, based on This boundary condition provides an advective outflow condition, based on
solving DDt(psi, U) = 0 at the boundary. solving DDt(W, field) = 0 at the boundary where \c W is the wave velocity
and \c field is the field to which this boundary condition is applied.
The standard (Euler, backward, CrankNicolson, localEuler) time schemes are The standard (Euler, backward, CrankNicolson, localEuler) time schemes are
supported. Additionally an optional mechanism to relax the value at supported. Additionally an optional mechanism to relax the value at
@ -37,7 +38,7 @@ Description
switched on by specifying the relaxation length-scale \c lInf and the switched on by specifying the relaxation length-scale \c lInf and the
far-field value \c fieldInf. far-field value \c fieldInf.
The flow/wave speed at the outlet is provided by the virtual function The flow/wave speed \c (w) at the outlet is provided by the virtual function
advectionSpeed() the default implementation of which requires the name of advectionSpeed() the default implementation of which requires the name of
the flux field \c (phi) and optionally the density \c (rho) if the the flux field \c (phi) and optionally the density \c (rho) if the
mass-flux rather than the volumetric-flux is given. mass-flux rather than the volumetric-flux is given.

7
src/finiteVolume/fields/fvPatchFields/derived/waveTransmissive/waveTransmissiveFvPatchField.H
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@ -29,18 +29,19 @@ Group
Description Description
This boundary condition provides a wave transmissive outflow condition, This boundary condition provides a wave transmissive outflow condition,
based onsolving DDt(psi, U) = 0 at the boundary. based on solving DDt(W, field) = 0 at the boundary \c W is the wave velocity
and \c field is the field to which this boundary condition is applied.
The wave speed is calculated using: The wave speed is calculated using:
\f[ \f[
x_p = \frac{\phi_p}{|Sf|} + \sqrt{\frac{\gamma}{\psi_p}} w_p = \frac{\phi_p}{|Sf|} + \sqrt{\frac{\gamma}{\psi_p}}
\f] \f]
where where
\vartable \vartable
x_p | patch values w_p | patch wave speed
\phi_p | patch face flux \phi_p | patch face flux
\psi_p | patch compressibility \psi_p | patch compressibility
Sf | patch face area vector Sf | patch face area vector