∇

Properties

  • Robin condition
  • a linear blend of fixedValue and gradient conditions
  • blending specified using a value fraction
  • not usually applied directly, but used in derived types, e.g. the inletOutlet condition
  • explicit and implicit contributions

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

Usage 

<patchName>
{
    type            mixed;
    refValue        <field value>;
    refGradient     <field value>;
    valueFraction   <field value>;
}

Further information

Source code: