Face values are evaluated according to:
\[ \phi_f = w \phi_{ref} + \left(1-w\right)\left(\phi_c + \Delta \grad{\phi}_{ref} \right) \]
where
\( \phi_f \) | = | face value |
\( \phi_c \) | = | cell value |
\( \phi_{ref} \) | = | reference value |
\( \Delta \) | = | face-to-cell distance |
\( w \) | = | value fraction |
<patchName> { type mixed; refValue <field value>; refGradient <field value>; valueFraction <field value>; }
Source code:
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