|
[Sponsors] |
September 25, 2018, 14:07 |
F1 car simulation
|
#1 |
New Member
Vignesh
Join Date: Mar 2014
Posts: 22
Rep Power: 12 |
What is the purpose of giving rotating boundary conditions for wheel in f1 car simulation ? Would the wheel rotate?
|
|
September 25, 2018, 14:10 |
|
#2 |
Senior Member
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,793
Rep Power: 71 |
||
September 25, 2018, 14:19 |
|
#3 |
New Member
Vignesh
Join Date: Mar 2014
Posts: 22
Rep Power: 12 |
||
September 25, 2018, 14:23 |
|
#4 |
New Member
Vignesh
Join Date: Mar 2014
Posts: 22
Rep Power: 12 |
Why do they prefer to give rotating boundary conditions for wheel?
What does it do? What if we don't give rotating boundary condition and instead treat it as solid wall boundary? |
|
September 26, 2018, 18:48 |
|
#5 |
Senior Member
Join Date: Dec 2017
Posts: 153
Rep Power: 8 |
Hi,
Have you ever tried to simulate the flow around a steady and a rotating cylinder? See the works of Mittal to get the point Fluid dynamics is different in the two cases! Separetion point and pressure distribution can be significantly different and also the interaction with the vehicle's body change. This is why the wheels rotation is important, especially if you are doing a simulation for an application where every newton of downforce is important. |
|
September 26, 2018, 21:58 |
|
#6 |
New Member
Quentin d'Avout
Join Date: Oct 2017
Location: Marseille
Posts: 19
Rep Power: 8 |
Rotating the wheels will largely complicate your mesh and complexity, but will get you a more accurate flow hitting your downstream part. Mesh adaptation can help quite a bit.
In the case of an F1, it is crucial to get the tire wake right, so sidepods, underbody, diffuser and rear wing all get the correct upstream flow. That's also why you see such complicated front wings these days: divert that flow around these messy wheels. |
|
September 27, 2018, 14:05 |
|
#7 | |
New Member
Vignesh
Join Date: Mar 2014
Posts: 22
Rep Power: 12 |
Quote:
Why most people don't create MRF zone for the wheel as they do for radiator fan ? What are the various rotating frame off reference and please let me know when to use what? Thanks in advance. |
||
October 2, 2018, 19:07 |
|
#8 |
Senior Member
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 24 |
Yes, you should specify the angular velocity if you are setting the reference frame at the center of rotation. If your reference frame is elsewhere then it would be different. I'm not sure why anyone would choose anything other than the center of rotation, though. The latter is the simplest way to specify it.
Most people doing serious aero work will create MRF areas for the inside of the wheel and the wheel rim. The tire however just gets a wall velocity specification. Making an MRF zone for the tire in a general was is very complex and usually not done unless you use something like an overset method. |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
HELP - Moving car simulation in fluent | Brad Wells | FLUENT | 7 | January 4, 2018 19:55 |
Simulation inside car cabin | IronMike | FLUENT | 1 | April 10, 2016 09:06 |
Convergence of jet flow simulation | MiraLisa | FLUENT | 0 | August 15, 2013 04:44 |
Fan simulation divergence | ayothicfd | CFX | 18 | July 20, 2012 05:53 |
car simulation - boundary layer street | sanchezz | CFX | 8 | January 13, 2010 18:05 |