|
[Sponsors] |
Velocity Boundary Conditions for Flat Plate Domain |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
January 26, 2019, 08:42 |
Velocity Boundary Conditions for a wall
|
#1 |
Member
Oguzhan
Join Date: Aug 2017
Posts: 38
Rep Power: 9 |
Hi all,
I'm trying to simulate a flow over flat plate for some validation purposes. What I would normally do is to create a rectangular box and treat the top surface as symmetry. However, the paper I'm looking at defines the top boundary condition as follows; "The top boundary conditions are u=Uinf, v=VBlasius, w=0, and T=Tinf " Does anyone know how to define (in Fluent) such conditions on top of a domain (which is not an inlet obviously), which is basically a plate? Cheers, heisenmech Last edited by heisenmech; January 26, 2019 at 10:43. |
|
January 26, 2019, 15:27 |
|
#2 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,760
Rep Power: 66 |
It's actually is obviously velocity inlet.
|
|
January 28, 2019, 10:47 |
|
#3 |
Member
Oguzhan
Join Date: Aug 2017
Posts: 38
Rep Power: 9 |
Thanks for the reply. I wasn't sure about that until I gave it a try with quick setup simulation. I'm still wondering though why I cant use (or why one would use velocity inlet) a simple symmetry BC on top since the results are pretty much the same. Any thoughts?
Cheers, |
|
January 28, 2019, 10:54 |
|
#4 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,760
Rep Power: 66 |
In my experience, more people use a symmetry BC at the top (or slip walls) than anything else. Yeah I can't tell you why this one particular person think it's unusable. To each their own. The choice of which to use is by the user. But each has to verify that they have a proper boundary layer in their simulation after-the-fact.
The BC that you want is the natural boundary condition these are all just ways to mimic that behavior. There is also a freestream BC in Fluent which might even be better than symmetry/slip/velocity BC. |
|
January 29, 2019, 06:09 |
|
#5 | |
Member
Oguzhan
Join Date: Aug 2017
Posts: 38
Rep Power: 9 |
Quote:
|
||
January 29, 2019, 10:09 |
|
#6 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,760
Rep Power: 66 |
Yes, probably. It has been a few days since I opened Fluent. =)
|
|
February 1, 2019, 07:21 |
|
#7 |
Member
Oguzhan
Join Date: Aug 2017
Posts: 38
Rep Power: 9 |
Fair enough Thanks for your replies LuckTran! Cheers!
|
|
Tags |
boundary condition u, boundary conditions, flat plate |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Wind turbine simulation | Saturn | CFX | 60 | July 17, 2024 06:45 |
My radial inflow turbine | Abo Anas | CFX | 27 | May 11, 2018 02:44 |
Domain Imbalance | HMR | CFX | 5 | October 10, 2016 06:57 |
Multiphase flow - incorrect velocity on inlet | Mike_Tom | CFX | 6 | September 29, 2016 02:27 |
Radiation interface | hinca | CFX | 15 | January 26, 2014 18:11 |