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Hi,

I am looking at a problem that solves physics at two different time scales. Basically, I want to do the following

At a coarser time scale I want to solve a few partial differential equations (PDEs).

In each coarse time step, the source terms and some coefficients for these PDEs have to be determined by solving a few other PDEs with shorter time steps. The physics at the finer time scale will be solved for a few time steps and then eventually when the fine time scale agrees with the coarser time, the coefficients and source terms are updated. An algorithm will be

For CoarseTimeStep = 1 to n
for FinerTimeStep = 100 smaller time steps in each coarseTimeStep
solve PDE_SET_1 to get coefficients and source terms
end

Use these coefficients and source terms to solve PDE_SET_2
end

Can someone suggest if this is possible to do in comsol? If so, can you kindly point me to appropriate resources.

Thanks,

Hamsa