On 4/13/20 6:00 PM, Krishnakumar Gopalakrishnan wrote:
I am currently working on Step-52, which solves the diffusion equation.
I now want to disable the Method of Manufactured Solutions (MMS) i.e. get rid
of the forcing function which produces an expected analytical solution, in the
direction towards solving my real-world problem. I also have set the
absorption coefficient to zero, so that the diffusion equation reduces to a
form analogous to the heat-equation.
Currently, the initial condition is set to be the zero vector.
As a first step, I'd like to set my initial solution to be sin(b*x) * sin(b*y).
I am currently interested in using only the embedded explicit method driver
function. Within this, I suspect that the lines of interest are the following:
solution = 0.;
constraint_matrix.distribute(solution);
But I am not quite sure how can this initial condition be imposed. Any help
will be much appreciated.
You will want to take a look at step-25. That program uses
VectorTools::project(), but you can also use VectorTools::interpolate() instead.
Best
W.
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