|
[Sponsors] |
Boundary conditions at infinity for the velocity potential |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
July 11, 2012, 08:36 |
Boundary conditions at infinity for the velocity potential
|
#1 |
Senior Member
Join Date: Dec 2011
Location: Madrid, Spain
Posts: 134
Rep Power: 15 |
Hi guys, I have been struggling lately with a potential flow code around a 2D airfoil and I found one problem.
I compute the potential flow around the airfoil on a body-fitted grid that I generated solving a Poisson equation (elliptic grid). Later on some circulation is explicitly added around the airfoil in order to simulate the effect of the boundary layer (the circulation will be such that the Kutta condition is enforced, i.e., the flow separates at the trailing edge). The outer domain is a circle with a radius much longer than the chord of the airfoil. The question is: to which value do I set the velocity potential at the outer domain? Thank you for your help. Cheers, Michujo. |
|
July 11, 2012, 08:57 |
|
#2 |
Senior Member
Join Date: Dec 2011
Location: Madrid, Spain
Posts: 134
Rep Power: 15 |
Ok, I could figure out that the contribution of the velocity far from the airfoil is , where the infinity symbol denotes at the outer boundary, far from the airfoil.
This is the potential due to the free stream. However, as circulation is being generated around the airfoil, what is the effect of this circulation on the velocity potential? Thanks again. |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Domain Imbalance | HMR | CFX | 5 | October 10, 2016 05:57 |
Velocity inlet boundary conditions | abm | FLUENT | 16 | October 18, 2014 08:52 |
maintaining a logarithmic velocity distribution | Morten Andersen | CFX | 1 | January 8, 2007 11:37 |
Boundary conditions? | Tom | Main CFD Forum | 0 | November 5, 2002 01:54 |
Boundary Conditions for Velocity Potentials for Solving the Incompressible NSE | Ulian Spassov | Main CFD Forum | 6 | July 21, 1999 06:01 |