- **Main CFD Forum**
(*https://www.cfd-online.com/Forums/main/*)

- - **projection-2
**
(*https://www.cfd-online.com/Forums/main/3310-projection-2-a.html*)

projection-2
hi,everyone,
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)}. Tony |

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: http://www.math.psu.edu/shen/publications.html |

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