 |
 |
 |
|
|
|
[Sponsors] | ||||
February 27, 2020, 07:42
|
Steady vs transient
|
#1 |
|
New Member
Rohan Iyer
Join Date: Jan 2020
Posts: 2
Rep Power: 0  |
Can anybody tell me why when I run flow over a cylinder at Re=200 in steady and unsteady cases the results differ?
Or should they not differ? I am getting less amplitude for lift in case of steady but in unsteady case I'm getting validation from literature |
|
|
|
|
|
February 27, 2020, 10:30
|
Regime
|
#2 |
|
Senior Member
|
If your Re is based on cylinder diameter, then you are in the transition regime. Flow is not steady, hence, only transient simulation makes sense. In any case, transient results are better than steady-state, provided it has been run for longer than characteristic time.
__________________
Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority. |
|
|
|
|
|
|
February 27, 2020, 21:07
|
|
#3 | |
|
New Member
Rohan Iyer
Join Date: Jan 2020
Posts: 2
Rep Power: 0 |
Quote:
|
||
|
|
|
||
 |
| Tags |
| flow across a cylinder, low reynold's number, steady and unsteady state |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Transient simulations: how to tell its converged (I've read the FAQ & user guides!) | JuPa | CFX | 12 | March 27, 2020 17:24 |
| Convergence in Transient; Divergence in Steady State | artkingjw | FLUENT | 6 | May 24, 2018 02:51 |
| Steady state solution ----> transient | nskelly | OpenFOAM Running, Solving & CFD | 4 | March 12, 2018 11:49 |
| VAWT Steady or Transient?? | Borjinho | FLUENT | 0 | August 8, 2013 16:38 |
| Laminar gas flow under slight suction - transient works but not steady | audrey | CFX | 1 | September 8, 2011 19:43 |
Linear Mode
