parameter, addToParameter, and updateParameter

These commands are used to update permeability parameters of solid-fluid fully coupled elements including FourNodeQuadUP, Nine_Four_Node_QuadUP, BrickUP, and Twenty_Eight_Node_BrickUP.

To update the permeability parameters, please follow the steps below:

Step 1: Define a parameter using the parameter command:

parameter $param_tag element $ele_tag hPerm

parameter $param_tag element $ele_tag vPerm

where hPerm represents the permeability parameter in the horizontal direction, and vPerm for the vertical direction.

Step 2 (Optional): Add to the parameter for more elements (if needed) using the addToParameter command:

addToParameter $param_tag element $ele_tag hPerm

addToParameter $param_tag element $ele_tag vPerm

Step 3: Update the parameter using the updateParameter command:

updateParameter $param_tag $newVal

Example:

…

parameter 1 element 1 hPerm

addToParameter 1 element 2 hPerm

…

updateParameter 1 1e-5

…