[CIG-MC] doubt about viscosity.smooth_cycles

ting yang heaventian at gmail.com
Wed Apr 18 10:22:39 PDT 2012

    I'm now reading the program of citcom.There is one doubt about the
parameter viscosity.smooth_cycles.
In Solver_multigrid.c, the method to constraint vicosity from finner level
to coarser level is different for different values of
viscosity.smooth_cycles(ranging from 0 to 3)
But I cannot understand the advantages and disadvantages of each respect to
the others.
Can you describe to me briefly the situations suited for each choice of
Will the choice of viscosity.smooth_cycles affect the convergence of Stokes
solver greatly?

Best wishes!

wish you happiness !
yours sincerely,
Yang Ting
School of Earth and Space Science
University of Science and Technology of China
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