 |
 |
 |
|
|
|
[Sponsors] | ||||
March 24, 2009, 08:17
|
Comsol Multiphysics 3.5
|
#1 |
|
New Member
Bruno
Join Date: Mar 2009
Posts: 3
Rep Power: 17  |
Hi!!! I'm using Comsol for my simulations (i'm a student with very interest in cfd). When i'm simulating in transient mode the convergence graph appears like this: Reciprocal of time size versus time step. What it means?how this can help me to see if the simulation is converging? The Comsol Manual say that "When using a time-dependent solver, the graph on the Convergence page shows the reciprocal of the time step size versus the time step. That is, a convergence plot with decreasing values shows that the time-dependent solver takes longer time steps, and vice versa.".... anyone can help me?
Thanks!!! |
|
|
|
|
|
March 25, 2009, 00:12
|
|
#2 |
|
New Member
Marcelo
Join Date: Mar 2009
Location: Valparaiso Chile
Posts: 26
Rep Power: 17 |
a convergence plot with decreasing values shows that the time-dependent solver takes longer time steps, and vice versa
ok if the plot increase the time step is smoller and smoller so this mean that you numerial method need this to find the solution... and if the time step is very smoll the solution stop (we dont like time step 0)... you can find very good explications in Versteeg and Malalasekera Book |
|
|
|
|
|
 |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Pros and Cons for CFX, CFdesign, COMSOL | Val | Main CFD Forum | 3 | June 10, 2011 03:20 |
| Compressible Fluid Flow in COMSOL Multiphysics | BBG | COMSOL | 1 | November 19, 2008 15:05 |
| Help with COMSOL | André Ferreira | COMSOL | 4 | March 7, 2008 04:00 |
| Calculation with COMSOL Multiphysics | sega | COMSOL | 4 | January 20, 2008 15:06 |
| PHOENICS 3.5 temperature calculation | Jas | Phoenics | 2 | January 15, 2004 07:11 |
Linear Mode
