|
[Sponsors] |
Confuse on initial condition and velocity profile v(0)=0 |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
September 17, 2015, 08:38 |
Confuse on initial condition and velocity profile v(0)=0
|
#1 |
Member
kiwi
Join Date: Mar 2012
Location: South East Asia
Posts: 58
Rep Power: 14 |
Dear all,
I am confused on the role of initial condition in the transient laminar flow practice and hope someone can explain to me. e.g. if I have definite my initial velocity as the maximum flow rate of my entire velocity profile, such as v= 0.5m/s which I have the respective pressure magnitude which I achieved through the steady solution. when I input my velocity profile as inlet profile of a tube, I start with v(0)=0, may I know which one fluent solver will use as its starting point for the iterations for better convergence? I am quite worried about initial condition. as it looks to me that if it start with v(0)=0.5m/s, then what if my v(0.01)=0.1m/s, shouldn't it a big problem for solver to converge from 0.5 to 0.1m/s? hope someone can explain it to me. thank you. |
|
September 18, 2015, 11:21 |
|
#2 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,674
Rep Power: 65 |
The initial conditions apply only to the interior cells. The boundary conditions are also imposed on the boundaries. So for interior cells the initial velocities would be the initial conditions. For boundary faces, the initial velocities would be taken from your boundary conditions.
|
|
September 19, 2015, 00:26 |
|
#3 | |
Member
kiwi
Join Date: Mar 2012
Location: South East Asia
Posts: 58
Rep Power: 14 |
Quote:
|
||
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
problem with Min/max rho | tH3f0rC3 | OpenFOAM | 8 | July 31, 2019 09:48 |
Micro Scale Pore, icoFoam | gooya_kabir | OpenFOAM Running, Solving & CFD | 2 | November 2, 2013 13:58 |
Velocity profile boundary condition | Tuca | FLOW-3D | 1 | April 23, 2013 12:02 |
Velocity Profile as an Initial Condition | ylm054 | CFX | 4 | December 7, 2009 19:48 |
Modeling in micron scale using icoFoam | m9819348 | OpenFOAM Running, Solving & CFD | 7 | October 27, 2007 00:36 |