coolantPressureFvPatchVectorField

Description

The coolantPressure boundary condition is used to apply the coolant pressure (fixed or time-dependent) to a patch. It is a simplified re-implementation of the tractionDisplacement boundary condition, allowing the user to work directly with the coolant pressure instead of specifying both traction and pressure values.

Note

This BC inherits from the parten class tractionDisplacement the possibility of activating a plane strain approximation as well as a spring-dashpot system.

Options

The coolantPressure fvPatchField can be selected in the patch subdictionary inside the boundaryField subdictionary of the displacement field.

Parameters in the patch subdictionary for coolantPressure:

coolantPressureList	A time-dependent pressure table. Each entry consists of a time step (using the time unit defined in `solverDict`) followed by the pressure value in Pa.
coolantPressure	Fixed pressure in Pa. Used only if `coolantPressureList` is not provided.
planeStrain	Activates the plane strain approximation for the normal stress at the boundary. When enabled, the normal strain is assumed constant across the last layer of cells. Default: `false`.
fixedSpring	Activates a fixed spring-dashpot system for additional stability. Default: `false`.
fixedSpringModulus	Spring modulus in N/m. Required when `fixedSpring` is set to `true`.
dashpotModulus	Dashpot modulus in N/m. Required when `fixedSpring` is set to `true`.
relax	Relaxation factor for gradient updates. Default: `1.0`.
value	Initial displacement value (not stress).

Usage

To apply the coolantPressure boundary condition to a given patch, you need to specify its typename in the patch definition in the boundary condition file (e.g., 0/D or 0/DD for simulations involving incremental mechanical solvers).

Example: Applying coolantPressure to the cladOuter patch:

cladOuter
{
    type            coolantPressure;

    // Fixed pressure in case the coolantPressureList is not provided
    // coolantPressure 1e5;

    coolantPressureList
    {
        type                table;

        // Use "file" or directly provide "values"
        file                "$FOAM_CASE/constant/lists/coolantPressureList";

        // Optional: values can be provided directly
        // values
        // (
        //     (0.0 1e5)
        //     (100.0 1e6)
        // );

        format              foam;      // Optional data format
        outOfBounds         clamp;     // Optional handling for out-of-bounds values
        interpolationScheme linear;    // Optional interpolation method
    }

    // Activate plane strain approximation (default is false)
    planeStrain     false;

    // Relaxation factor
    relax           1.0;

    // Initial displacement value
    value           $internalField;
}