[mahbod_mbs]

p { margin-bottom: 0.1in; line-height: 120%; } Hi
I am going to move some of the boundaries in my simulation based on a desired function. So, implementing groovyBC in pointDisplacement file (displacementLaplacian is used for dynamic mesh), I apply the desired expression on the boundaries. However, I have to use the initial positions of the vertices of a boundary ( pts().x and pts().y ) in other time steps. I do not know how to save the initial positions of the vertices (at t=0) to be available for other time steps.
Any help/hint is appreciated.

[gschaider]

Originally Posted by mahbod_mbs

p { margin-bottom: 0.1in; line-height: 120%; } Hi
I am going to move some of the boundaries in my simulation based on a desired function. So, implementing groovyBC in pointDisplacement file (displacementLaplacian is used for dynamic mesh), I apply the desired expression on the boundaries. However, I have to use the initial positions of the vertices of a boundary ( pts().x and pts().y ) in other time steps. I do not know how to save the initial positions of the vertices (at t=0) to be available for other time steps.
Any help/hint is appreciated.

Look for "storedVariables" in the examples. storedVariables are "remembered" between time-steps and have to have an initial value (which can be an expression)