Fixed gradient

Properties

• Neumann condition
• fixed normal-gradient
• implicit

Face values are evaluated according to:

$$\phi_f = \phi_c + \Delta \grad{\phi}_{\ref}$$

where $\phi_f$ : face value

$\phi_c$ : cell value

$\grad(\phi)_{\ref}$ : reference gradient

$\Delta$ : face-to-cell distance

Usage

<patchName>
{
    type        fixedGradient;
    gradient    <field value>;
}

Further information

Source code:

• Foam::fixedGradientFvPatchField