|
[Sponsors] |
December 13, 2012, 20:25 |
Reference values resetting?
|
#1 |
New Member
Join Date: Aug 2012
Posts: 2
Rep Power: 0 |
I am modelling a car with one front wing and one rear wing inside a domain. I would like to know how to setup the reference values correctly. So far I have used the default values but I now realize that this is not correct.By selecting "Front Wing" under "compute from" I am able to select the planform area which is fine. The problem is when I try to input the rear wing planform area. When I select "Rear Wing" the value that I inputed for the front wing gets overwritten by the value for the "Rear Wing" Is this not the correct way of inputing reference values?
EDIT: Perhaps I only need to input one reference value for one wing and the values that I need (lift,drag, CL, CD) should be correct? |
|
December 13, 2012, 22:54 |
|
#2 | |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,668
Rep Power: 65 |
The resetting is normal behavior.
Quote:
You can only specify one set of reference values at a time. Fluent uses these reference values to compute certain quantities (lift, drag, etc.) globally. If you want to compute these quantities for two sections that might possibly have difference reference values, such as cross sectional area, then you need to change the reference values accordingly before you compute the quantities for that section. i.e. set the reference values using the front wing and then calculate lift on the front wing. Then change the reference values for the rear wing and then calculate lift on the rear wing. The reference values should be user specified (by you). These should be the correct reference values in accordance with the definitions of lift,drag, CL and CD. It is better to input them explicitly rather than using compute from. But if compute from is working for you then by all means use it. |
||
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[swak4Foam] difficulties installing swak4foam | newbie29 | OpenFOAM Community Contributions | 120 | October 21, 2022 04:01 |
It would be wonderful if a tool for FoamToTecplot is available | luckyluke | OpenFOAM Post-Processing | 165 | November 27, 2012 06:54 |
Reference Values | Lilly | FLUENT | 1 | May 31, 2012 09:51 |
OpenFOAM 1.6-ext git installation on Ubuntu 11.10 x64 | Attesz | OpenFOAM Installation | 45 | January 13, 2012 12:38 |
Windows Installation BugsComments on Petrbs patch | brooksmoses | OpenFOAM Installation | 48 | April 16, 2006 00:20 |