CFD Online Discussion Forums

CFD Online Discussion Forums (
-   Main CFD Forum (
-   -   projection-2 (

Tony March 30, 2001 21:18


I want to know if I let the value of the speed in time layer t=k-1(k is the time layer) equal to zero(or other constant value) in the begainning of the simulation to evaluate the velocity field t=k+1,what will happen?I use the projection-2 method for the imcompressible fluid,and du/dt is differenced by {3u(k+1)-4u(k)+u(k-1)}/{2*delta(t)}.


Sebastien Perron April 1, 2001 08:46

Re: projection-2
If the velocity field is constant and agree with the boundary conditions, then it is already divergence free.

Since you use Gear scheme's, I suppose your problem is transient. it must come with a suitable initial solution which depends on the problem that as to be solved.

If you want more info on projection methods, you might try this location:

All times are GMT -4. The time now is 06:06.