vorticity

Description

The vorticity function object computes the vorticity, the curl of the velocity.

$$\vec \Omega = \nabla \times \u$$

where:

$\vec \Omega$ : Vorticity vector [1/s]

$\u$ : Velocity [m/s]

Operands

Operand	Type	Location
input	volVectorField	$FOAM_CASE/<time>/<inpField>
output file	-	-
output field	volVectorField	$FOAM_CASE/<time>/<outField>

Usage

Example of the vorticity function object by using functions sub-dictionary in system/controlDict file:

vorticity1
{
    // Mandatory entries (unmodifiable)
    type        vorticity;
    libs        (fieldFunctionObjects);

    // Optional (inherited) entries
    field           <inpField>;
    result          <fieldResult>;
    region          region0;
    enabled         true;
    log             true;
    timeStart       0;
    timeEnd         1000;
    executeControl  timeStep;
    executeInterval 1;
    writeControl    timeStep;
    writeInterval   1;
}

where the entries mean:

Property	Description	Type	Required	Default
type	Type name: vorticity	word	yes	-
libs	Library name: fieldFunctionObjects	word	yes	-

The inherited entries are elaborated in:

• functionObject
• fieldExpression

Example by using the postProcess utility:

postProcess -func vorticity

Sample output

Further information

Tutorial:

• pimpleFoam surfaceMountedCube tutorial: fullCase

Source code:

• vorticity

API:

• Foam::functionObjects::vorticity

Related:

• Q criterion

History: Introduced in version v1812 ]