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Forum: Main CFD Forum June 3, 2017, 13:27
Replies: 21
Views: 1,871
Posted By AnasVFX
Can you post a source?

Can you post a source?
Forum: Main CFD Forum June 2, 2017, 20:26
Replies: 21
Views: 1,871
Posted By AnasVFX
now , I understood . Thanks :)

now , I understood . Thanks :)
Forum: Main CFD Forum June 2, 2017, 17:57
Replies: 21
Views: 1,871
Posted By AnasVFX
stam is just implementing boundaries for the...

stam is just implementing boundaries for the pressure and he implements equation 18 in the code to enforce the normal derivative of pressure =0
Bridson uses a different notation of the pressure at...
Forum: Main CFD Forum June 2, 2017, 16:53
Replies: 21
Views: 1,871
Posted By AnasVFX
In this source here in section 38.2.4 ...

In this source here in section 38.2.4
http://developer.download.nvidia.com/books/HTML/gpugems/gpugems_ch38.html

He said in the boundary conditions section
And at the end of the chapter he said ...
Forum: Main CFD Forum June 2, 2017, 16:30
Replies: 21
Views: 1,871
Posted By AnasVFX
I am really sorry I still don't understand the...

I am really sorry I still don't understand the relationship between the normal derivative of pressure and the solid boundaries. Actually I don't know how to force u.n =u.solid.n
in the code :( I am...
Forum: Main CFD Forum June 2, 2017, 14:25
Replies: 21
Views: 1,871
Posted By AnasVFX
I read in Stam's ways of implementing a Fluid...

I read in Stam's ways of implementing a Fluid solvers that we use this normal derivative boundary condition to solve the pressure poisson problem. And he said that we use this zero normal derivative...
Forum: Main CFD Forum June 2, 2017, 12:22
Replies: 21
Views: 1,871
Posted By AnasVFX
So when we use the boundary partial p / partial n...

So when we use the boundary partial p / partial n = 0? In the sli condition only?
Forum: Main CFD Forum June 2, 2017, 00:04
Replies: 21
Views: 1,871
Posted By AnasVFX
Can you take a look at the paper of Bridson? He...

Can you take a look at the paper of Bridson? He didn't apply this boundary you said. I don't know actually how to apply the boundary of the pressure in the equation pf pressure poisson. His way is...
Forum: Main CFD Forum June 1, 2017, 21:06
Replies: 21
Views: 1,871
Posted By AnasVFX
I am reading but my question is a lot simpler. I...

I am reading but my question is a lot simpler. I just want to solve the pressure poisson equation with the slip boundary conditions. The condition for the velocity is u*n = usolid*n which I don't...
Forum: Main CFD Forum June 1, 2017, 16:54
Replies: 21
Views: 1,871
Posted By AnasVFX
I mean that if we just have a dirichlet or...

I mean that if we just have a dirichlet or Neumann condition like u'(0)=1,we can just evaluate u (0) and put it in the first row of the matrix
Another thing, when we just solve the pressure poisson...
Forum: Main CFD Forum June 1, 2017, 16:10
Replies: 21
Views: 1,871
Posted By AnasVFX
Simple explain for satisfying boundary conditions in Stam and Bridson papers

I read Stable Fluids...
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