Search Results

User Name Remember Me Password

Showing results 1 to 20 of 20 Search took 0.00 seconds. Search: Posts Made By: lxlylzl

Forum: FLUENT July 21, 2012, 02:25

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Thanx RodriguezFatz... Thanx RodriguezFatz (http://www.cfd-online.com/Forums/members/rodriguezfatz.html). The book is really nice :) !

Forum: FLUENT July 20, 2012, 23:20

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl I think, it depends on your problem type and... I think, it depends on your problem type and whether you want any particle interaction or not (I mean 1st order coupling or 2nd order coupling, etc.). Regarding unsteady state, the flow inside the...

Forum: FLUENT July 19, 2012, 23:02

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl I got it RodriguezFatz. Well, I think I should go... I got it RodriguezFatz. Well, I think I should go for grid independence check first, before taking any decision because on some meshes I'm getting convergence using 2nd order upwind, while for others...

Forum: FLUENT July 19, 2012, 05:03

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Thanx RodriguezFatz :) Using 1st order... Thanx RodriguezFatz :) Using 1st order upwind from momentum onwards, the solution converged (image attached). Why wasn't it converging in 2nd order upwind? RodriguezFatz, which cyclone you are...

Forum: FLUENT July 19, 2012, 03:38

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Now I've started with 1st order upwind. Well... Now I've started with 1st order upwind. Well with 2nd order upwind, for 256K mesh, now with reduced time step, my residuals (I've taken 1e-05) are as shown in attachment.

Forum: FLUENT July 19, 2012, 03:13

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Fine RodriguezFatz... Fine RodriguezFatz (http://www.cfd-online.com/Forums/members/rodriguezfatz.html), now I'm going to try 1st order upwind.

Forum: FLUENT July 19, 2012, 02:45

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Hi flotus1, Yes, I LOWERED the time step for... Hi flotus1, Yes, I LOWERED the time step for the finer mesh. I haven't saved those images. Since I'm working in trial phase, I haven't saved the file in gambit's default format. I saved meshes of...

Forum: FLUENT July 19, 2012, 02:23

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Hi flotus1... Hi flotus1 (http://www.cfd-online.com/Forums/members/flotus1.html), I'm sorry, here it is, with 256K hex cell (I didn't save it for 196K mesh).

Forum: FLUENT July 19, 2012, 01:20

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Hi RodriguezFatz... Hi RodriguezFatz (http://www.cfd-online.com/Forums/members/rodriguezfatz.html) With 96K hex mesh, and using 2nd order upwind, my solution finally converged with single phase and with DPM too...

Forum: FLUENT July 18, 2012, 08:42

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl O.K. I'll give it a try and let u know soon. O.K. I'll give it a try and let u know soon.

Forum: FLUENT July 18, 2012, 03:48

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Hi RodriguezFatz After few time steps, the... Hi RodriguezFatz After few time steps, the continuity line in the residuals is mainly fluctuating. In the beginning, all the lines slopes down in a group and after, say, nearly 2000 iterations,...

Forum: FLUENT July 17, 2012, 23:56

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Hi RodriguezFatz, I couldn't achieve convergence... Hi RodriguezFatz, I couldn't achieve convergence with 2nd order upwind with DPM (image attached). With single phase, i somehow got convergence (image attached). To reduce simulation time, I'm...

Forum: FLUENT July 17, 2012, 14:04

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Hi RodriguezFatz, nice to hear you again. I think... Hi RodriguezFatz, nice to hear you again. I think you mean that I shall reduce the spatial discretization parameters to 1st order upwind, right! As soon as I finish the previous problem (which is...

Forum: FLUENT July 17, 2012, 05:39

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Thank you RodriguezFatz... Thank you RodriguezFatz (http://www.cfd-online.com/Forums/members/rodriguezfatz.html), I'll try with the new settings tonight and let you know the results.

Forum: FLUENT July 17, 2012, 04:57

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Hi RodriguezFatz. Particle density is 860 Kg/m^3,... Hi RodriguezFatz. Particle density is 860 Kg/m^3, and Inlet area is (0.145 x 0.058) m^2. After passing through inlet, air along with DPM experiences swirl motion to separate out the discrete phase...

Forum: FLUENT July 17, 2012, 04:40

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Hi RodriguezFatz. My mass flow rate for particles... Hi RodriguezFatz. My mass flow rate for particles is 0.001 Kg/s. I'll try "Number of Continuous Phase Iterations per DPM Iteration" equal to 1. Yes, for numerics, my default is : "High order scheme...

Forum: FLUENT July 17, 2012, 04:00

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Thanx RodriguezFatz. I am already using "Update... Thanx RodriguezFatz. I am already using "Update DPM Sources Every Flow Iteration" with its default value (i.e. 20). For tracking parameters I'm using 9e+05 as max. no. of steps. Under numerics, I've...

Forum: FLUENT July 17, 2012, 03:43

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Thanx RodriguezFatz... Thanx RodriguezFatz (http://www.cfd-online.com/Forums/members/rodriguezfatz.html) 4 ur reply. Yes I've checked "Interaction with Continuous Phase", and I've been injecting around 750 particles...

Forum: FLUENT July 17, 2012, 03:04

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Thank you sicfred... Thank you sicfred (http://www.cfd-online.com/Forums/members/sicfred.html) for your reply. I've increased and decreased the time step, but the results are the same as before. Well, throughout I've...

Forum: FLUENT July 17, 2012, 00:34

Replies: 36 Gas Cyclone convergence problem Views: 4,896 Posted By lxlylzl Gas Cyclone convergence problem Hi everybody This is my 1st post in this forum and hope for your co-operation. I'm working on reverse flow gas cyclone with DPM. I'm working with RSM: Non-equilibrium wall function. I've...

Showing results 1 to 20 of 20

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