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Showing results 1 to 15 of 15 Search took 0.00 seconds. Search: Posts Made By: VincentD

Forum: Main CFD Forum November 12, 2011, 06:12

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD Hi fisicas, there is no such thing as a 2D... Hi fisicas, there is no such thing as a 2D pipe, a pipe is a 3D structure. I guess 2 parallel plates is about as good as it gets as for making a 2D pipe. If your going to a 3D simulation of a...

Forum: Main CFD Forum October 19, 2011, 05:21

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD Why do you want to use an unstructured grid? ... Why do you want to use an unstructured grid? Another option might be to use a structured grid with an immersed boundary method. Regards, Vincent

Forum: Main CFD Forum October 8, 2011, 04:40

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD I was wondering prasanthnitt, did this solution... I was wondering prasanthnitt, did this solution work out for you? Next it might be nice to change this code to 3D using multigrid method. Anyone up for that? Regards, Vincent

Forum: Main CFD Forum September 13, 2011, 05:26

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD Enjoy! function [Ue,P] = mit18086_GS ... Enjoy! function [Ue,P] = mit18086_GS %MIT18086_NAVIERSTOKES % Solves the incompressible Navier-Stokes equations in a % rectangular domain with prescribed velocities along the % boundary....

Forum: Main CFD Forum September 13, 2011, 05:22

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD Since I have never worked with Gauss-Seidel... Since I have never worked with Gauss-Seidel iterative solver yet, I'll break the idea down and build it up from the start. We want to solve the poisson equation: -\nabla^2 p = -\nabla \cdot...

Forum: Main CFD Forum September 6, 2011, 08:36

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD Indeed for a turbulent flow we do not expect p=0... Indeed for a turbulent flow we do not expect p=0 at the outflow (this would imply a steady field). I guess an evolving flow means periodic boundary conditions, so p is not equal to zero in that case....

Forum: Main CFD Forum September 6, 2011, 05:56

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD Alright I understand that we defined U and V... Alright I understand that we defined U and V velocity fields on a staggered grid. In the nonstaggered direction we do not have a factor, as we would expect. In the staggered direction the terms...

Forum: Main CFD Forum September 6, 2011, 03:19

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD Well, that is a really clear confirmation of the... Well, that is a really clear confirmation of the error made defining Ubc and Vbc. Thanks for figuring that one out. This part was completely clear, I already formulated this in my own post...

Forum: Main CFD Forum September 5, 2011, 10:50

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD My apologies for not responding to this thread,... My apologies for not responding to this thread, for some reason I didn't get any emails about it anymore. I would like to talk a bit about the 'boundary condition' issue cici was talking about....

Forum: Main CFD Forum August 13, 2011, 07:04

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD I don't have alot of time on my hands, so I... I don't have alot of time on my hands, so I changed the code to inflow/outflow. You can understand what I did by using the manual written by Seibold. Check BC's and how i changed the matrices for...

Forum: Main CFD Forum August 6, 2011, 03:55

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD Wow, thats alot of code. One thing you should not... Wow, thats alot of code. One thing you should not do in matlab is use for loops, it's terrribly slow and using matrix multiplication will result in a much cleaner code. So I'm going to make a counter...

Forum: Main CFD Forum August 4, 2011, 15:37

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD Sure, I will gladly help you out. Just post it on... Sure, I will gladly help you out. Just post it on the forum so that other people that are interested can follow the discussion. Regards, Vincent

Forum: Main CFD Forum August 4, 2011, 13:32

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD I'm doing an internship at a company at the... I'm doing an internship at a company at the moment and was asked to program in Matlab. I had previous experience with Fortran but had to relearn some work so I started on 2D DNS of flow between 2...

Forum: Main CFD Forum August 2, 2011, 14:13

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD Hey there, your BCs look just fine, just be... Hey there, your BCs look just fine, just be care of setting the boundary conditions. On a staggered grid setting u = 0 (wall condition in the y-direction) is done as setting u(bc) = -u(end) so...

Forum: Main CFD Forum July 23, 2011, 18:29

Replies: 72 Matlab code for pipe flow Views: 44,982 Posted By VincentD Well done writing your own Matlab code! If... Well done writing your own Matlab code! If all is well (you are correctly solving Navier-Stokes equations) changing Lid Driven Cavity flow is as 'easy' as changing the Boundary Conditions. Do...

Showing results 1 to 15 of 15

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