Search Results

User Name Remember Me Password

Showing results 1 to 13 of 13 Search took 0.00 seconds. Search: Posts Made By: new_at_this

Forum: Main CFD Forum May 23, 2012, 16:13

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this You are right. I didn't consider that. I guess... You are right. I didn't consider that. I guess what confuses me right now is that I expect that the area under the velocity curve should be constant in time. However as time progresses the area under...

Forum: Main CFD Forum May 23, 2012, 13:34

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this 1. So I checked the residual and yes the residual... 1. So I checked the residual and yes the residual is maxed out in the same regions as the maximum divergence values. 2. I don't ever calculate the pressure points on the boundary or outside...

Forum: Main CFD Forum May 23, 2012, 11:39

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this Can you elaborate or point me towards a reference... Can you elaborate or point me towards a reference that talks about this more. I have looked into a couple of cfd references and they don't really seem to talk about this issue and in most cases only...

Forum: Main CFD Forum May 22, 2012, 00:04

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this I think I figured out where the error is. When I... I think I figured out where the error is. When I formulate the finite difference matrix for the laplacian, I essentially solve Ax = b. However A is nearly singular and so my solution ends up being...

Forum: Main CFD Forum May 18, 2012, 11:56

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this So i'm working on a sliding cylinder problem,... So i'm working on a sliding cylinder problem, which is axisymmetric. Basically its a cylindrical cavity where the end caps are stationary and the wall is moving with a given velocity in the z...

Forum: Main CFD Forum May 16, 2012, 17:39

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this I think I have accounted for that. Since my code... I think I have accounted for that. Since my code is on a staggered grid, I'm only calculating pressure at the interior points. At the edges, I assume that the ghost point outside the boundary is the...

Forum: Main CFD Forum May 16, 2012, 17:24

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this the equation is just the cylindrical expansion... the equation is just the cylindrical expansion for: \nabla^2 P = \nabla \cdot \bar{u} I didn't put in the time because it cancels once applied in the navier stokes equations. I have...

Forum: Main CFD Forum May 16, 2012, 12:18

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this for those interested, I found this paper which... for those interested, I found this paper which essentially talks about my problem. Unfortunately I still have not found the bug in my code. I expect my code to produce a poiseuielle like profile that...

Forum: Main CFD Forum May 14, 2012, 13:24

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this Also are there any books or papers that I can... Also are there any books or papers that I can look up that talk about how to do this?

Forum: Main CFD Forum May 14, 2012, 12:01

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this So instead of solving for the pressure in one... So instead of solving for the pressure in one step, could I split it into two steps? the first step would be multiplying the divergence of the intermediate velocity (not divergent free) by the...

Forum: Main CFD Forum May 14, 2012, 11:38

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this I believe that i am using an exact projection... I believe that i am using an exact projection method. In each step of my code I update the u_z and u_r field by the advection and diffusion terms. Then I solve the following equation ...

Forum: Main CFD Forum May 14, 2012, 11:11

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this I do have a working code in cartesian coordinates... I do have a working code in cartesian coordinates that has been verified against ghia for the lid driven cavity. I'm a bit confused about what you are saying... Are you saying I should use the exact...

Forum: Main CFD Forum May 13, 2012, 18:08

Replies: 27 Pressure correction in fractional step method Views: 3,549 Posted By new_at_this Pressure correction in fractional step method Can someone explain to me how the pressure correction step works in cylindrical coordinates? I have been working on a code for a while and my pressure correction step is not producing a divergence...

Showing results 1 to 13 of 13

Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home General Forums     Main CFD Forum     System Analysis     Structural Mechanics     Electromagnetics     CFD Freelancers     Hardware     Lounge Software User Forums     ANSYS         CFX         FLUENT             Fluent Multiphase             Fluent UDF and Scheme Programming         ANSYS Meshing & Geometry     Autodesk Simulation CFD     AVL FIRE     COMSOL     CONVERGE     Fidelity CFD     FloEFD, FloWorks & FloTHERM     FLOW-3D     OpenFOAM         OpenFOAM News & Announcements             OpenFOAM Announcements from ESI-OpenCFD             OpenFOAM Announcements from OpenFOAM Foundation             OpenFOAM Announcements from Other Sources         OpenFOAM Installation         OpenFOAM Meshing & Mesh Conversion         OpenFOAM Pre-Processing         OpenFOAM Running, Solving & CFD         OpenFOAM Post-Processing         OpenFOAM Programming & Development         OpenFOAM Verification & Validation         OpenFOAM Community Contributions             OpenFOAM CC Toolkits for Fluid-Structure Interaction         OpenFOAM Journal         OpenFOAM Bugs     Phoenics     REEF3D         REEF3D News & Announcements     Siemens         STAR-CCM+         STAR-CD     SU2         SU2 News & Announcements         SU2 Installation         SU2 Shape Design Mesh Generation & Pre-Processing Software     ANSA     enGrid     GridPro     Pointwise & Gridgen Visualization & Post-Processing Software     EnSight     FieldView     ParaView     Tecplot Special Topics     Mesh Generation & Pre-Processing     Visualization & Post-Processing CFD Online Community     Site News & Announcements     Site Help, Feedback & Discussions     CFD-Wiki