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Using stationary state plus a local perturbation as initial condition
Posted May 29, 2019, 8:37 p.m. EDT Parameters, Variables, & Functions, Biosciences, Equation-Based Modeling 1 Reply
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Hello,
I am working on developing a time dependent simulation of a system of pde's that I have already set up. The system of pde's has 32 variables to be solved for. I am having trouble defining the initial conditions for it. The initial condition that I would like to impose on the simulation is the stationary state of my pde system plus a small perturbation on only one of the variables (this variable is meant to activate other variables in the system). The perturbation is supposed to be a small deviation, say of around 1% of the original value, on only a specific patch of the domain in which the variable is defined. How could I go about this? I've looked at some threads that mentioned using the "withsol" operator but I have not found this function anywhere.
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Marco,
you find the withsol() documentation in
COMSOL Multiphysics > COMSOL Multiphysics Reference Manual > Global and Local Definitions > Operators, Functions, and Constants > Built-In Operators
Cheers Edgar
-------------------Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com