Forum: Main CFD Forum
April 5, 2015, 04:04
|
|
Replies: 72
Views: 44,972
|
|
Forum: Main CFD Forum
April 3, 2015, 09:44
|
|
Replies: 72
Views: 44,972
I have used SIMPLE long back and so I am not...
I have used SIMPLE long back and so I am not familiar with the details. The pressure outflow boundary conditions can be tricky. Incase of divergence of the poisson solver I would recommend that you...
|
|
Forum: Main CFD Forum
April 3, 2015, 07:01
|
|
Replies: 72
Views: 44,972
|
|
Forum: Main CFD Forum
November 13, 2011, 09:46
|
|
Replies: 72
Views: 44,972
|
|
Forum: Main CFD Forum
October 19, 2011, 08:46
|
|
Replies: 72
Views: 44,972
Hi Mh. R,
I have a structured code too,...
Hi Mh. R,
I have a structured code too, written by myself. My formulation is for an unstructured grid but for some strange reasons the unstructured results tat I get are not correct except for...
|
|
Forum: Main CFD Forum
October 18, 2011, 14:07
|
|
Replies: 72
Views: 44,972
Hi Mh. R,
I am also looking for one such...
Hi Mh. R,
I am also looking for one such code. In any language its fine not necessarily in matlab. Do u have an unstructured FV code in Fortran or C or C++? If yes please share it.
Cheers...
|
|
Forum: Main CFD Forum
October 8, 2011, 05:27
|
|
Replies: 72
Views: 44,972
Hi Vincent,
I am extremely sorry for not...
Hi Vincent,
I am extremely sorry for not replying, was stuck with something and lost track of the post. I m still looking for better outflow boundary conditions. P=0 and dp/dn=-delta/dt both are...
|
|
Forum: Main CFD Forum
September 7, 2011, 15:20
|
|
Replies: 72
Views: 44,972
Hi Cici,
"just make sure that the boundary...
Hi Cici,
"just make sure that the boundary conditions for pressure are represented appropriately"
I did not quite get your point. Can you please explain.
I am using Gauss Jacobi Method to...
|
|
Forum: Main CFD Forum
September 7, 2011, 00:36
|
|
Replies: 72
Views: 44,972
Hello Cici,
Good to hear that. Can you tell...
Hello Cici,
Good to hear that. Can you tell me the modifications that you made to your initial Cavity code. How are you solving your Poisson equation? Iteratively or some kind of direct Poisson...
|
|
Forum: Main CFD Forum
September 6, 2011, 14:09
|
|
Replies: 72
Views: 44,972
|
|
Forum: Main CFD Forum
September 6, 2011, 11:49
|
|
Replies: 72
Views: 44,972
Hello Vincent,
I am not interested in a...
Hello Vincent,
I am not interested in a steady state boundary condition. Evolving flow need not be periodic always.
The boundary condition that you have given is for a very special case where...
|
|
Forum: Main CFD Forum
September 6, 2011, 06:20
|
|
Replies: 72
Views: 44,972
Pressure Bcn
Hello Vincent,
Your formulation is correct.
Regarding the boundary condition issue, so you say that you are trying to specify the boundary condition for the steady state. So this cannot be used...
|
|
Forum: Main CFD Forum
September 6, 2011, 05:16
|
|
Replies: 72
Views: 44,972
Code and Pressure Bcn
Hello Vincent,
The correct expression would be:
Ubc = dt/Re*([2*uS(2:end-1)' zeros(nx-1,ny-2) 2*uN(2:end-1)']/hy^2+...
[uW;zeros(nx-3,ny);uE]/hx^2);
Vbc = dt/Re*([vS' zeros(nx,ny-3)...
|
|
Forum: Main CFD Forum
September 6, 2011, 00:10
|
|
Replies: 72
Views: 44,972
Regarding the code
Hi Vincent,
"Secondly I had already noticed that the code only works correctly for hx=hy. Though
this might not be been intended, it is faster to calculate on a completely regular grid.
So this...
|
|
Forum: Main CFD Forum
September 1, 2011, 00:18
|
|
Replies: 72
Views: 44,972
Hi,
I went through the code. I think you are...
Hi,
I went through the code. I think you are right regarding the error.
I guess the issue is with the Poisson solver that we are using. I am using Gauss JAcobi method.
What method are you using...
|
|
Forum: Main CFD Forum
August 29, 2011, 13:46
|
|
Replies: 72
Views: 44,972
Hi Cici,
My code is in FORTRAN so I have to...
Hi Cici,
My code is in FORTRAN so I have to use iterative method and I cant use the Matrix method. Regarding the MIT profs code, I assume that you implemented the out flow boundary condition and...
|
|
Forum: Main CFD Forum
August 29, 2011, 08:07
|
|
Replies: 72
Views: 44,972
Fractional Step Methos
Hello Cici,
I would like to know which fractional step method are you using for your problem. I am facing the same problem as yours when I tried modifying my Lid Driven Cavity code to a duct flow....
|
