Flow rate

Table of Contents

• Properties
• Usage
  • Optional properties
• Further information

Properties

• Wrapper around the fixed condition
• Sets the velocity to a user-defined profile

Usage

The condition is specified in the field file for a volumetric flow rate using:

<patchName>
{
    type                flowRateInletVelocity;
    volumetricFlowRate  <Function1>;
    value               <field value>;
}

Field file for a mass flow rate:

<patchName>
{
    type                flowRateInletVelocity;
    massFlowRate        <Function1>;
    value               <field value>;
}

Optional properties

A uniform plug flow is set by default. To set the profile according to the downstream cells:

extrapolateProfile  yes;

To convert from a mass flow rate to a volumetric flow rate:

rho                 rho;

To convert from a mass flow rate to a volumetric flow rate for incompressible flows:

rhoInlet            1.0;

Further information

Source code:

• Foam::Function1
• Foam::fixedValueFvPatchField
• Foam::flowRateInletVelocityFvPatchVectorField

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