Thanks Andrew. I implemented the changes and the results are as expected. Bests, Satyendra
On Fri, Jun 25, 2010 at 17:29, Andrew McBride <[email protected]> wrote: > the values in the still to be determined solution vector prior to the > solution process act as the initial guess. you could populate the vector > randomly if you so desired. > have a look at tut 21: > "Before we solve for the pressure during a time step, we don't reset the > solution variable to zero. The pressure (and the other variables) therefore > have the previous time step's values at the time we get into the CG solver. > Since the velocities and pressures don't change very much as computations > progress, the previous time step's pressure is actually a good initial guess > for this time step's pressure. Consequently, the number of iterations we > need once we have computed the pressure once is significantly reduced." > > Andrew _______________________________________________ dealii mailing list http://poisson.dealii.org/mailman/listinfo/dealii
