momentumError

Table of Contents

• Description
  • Operands
• Usage
• Further information

Description

The momentumError function object computes balance terms for the steady momentum equation.

Operands

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

Usage

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

momentumError1
{
    // Mandatory entries (unmodifiable)
    type            momentumError;
    libs            (fieldFunctionObjects);

    // Optional entries (runtime modifiable)
    p               <pName>;
    U               <UName>;
    phi             <phiName>;

    // Optional (inherited) entries
    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: momentumError	word	yes	-
libs	Library name: fieldFunctionObjects	word	yes	-
p	Name of pressure field	word	no	p
U	Name of velocity field	word	no	U
phi	Name of flux field	word	no	phi

The inherited entries are elaborated in:

• functionObject

Usage by the postProcess utility is not available.

Further information

Tutorial:

• $FOAM_TUTORIALS/incompressible/simpleFoam/airFoil2D

Source code:

• Foam::functionObjects::momentumError

History

• Introduced in version v2006