yPlus

Table of Contents

• Description
  • Operands
• Usage
• Further information

Description

The yPlus function object computes the near wall \(y_1^+\) for turbulence models.

Operands

Operand	Type	Location
input	-	-
output file	dat	$FOAM_CASE/postProcessing/<FO>/<time>/<file>
output field	volScalarField	$FOAM_CASE/<time>/<outField>

Usage

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

yPlus1
{
    // Mandatory entries (unmodifiable)
    type            yPlus;
    libs            (fieldFunctionObjects);

    // Optional (inherited) entries
    writePrecision  8;
    writeToFile     true;
    useUserTime     true;
    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: yPlus	word	yes	-
libs	Library name: fieldFunctionObjects	word	yes	-

The inherited entries are elaborated in:

• functionObject
• writeFile

Example by using the postProcess utility:

<solver> -postProcess -func yPlus

Further information

Tutorial:

• $FOAM_TUTORIALS/incompressible/pisoFoam/RAS/cavity
• pimpleFoam channel395DFSEM tutorial: $FOAM_TUTORIALS/incompressible/pimpleFoam/LES/channel395DFSEM

Source code:

• Foam::functionObjects::yPlus

History

• Introduced in version v1606+