CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS

Getting a non zero lift coefficient for a simetric arifoil at 0 degrees AOA

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   January 8, 2024, 18:03
Question Getting a non zero lift coefficient for a simetric arifoil at 0 degrees AOA
New Member
Join Date: Jan 2024
Posts: 1
Rep Power: 0
TomTheEngineer is on a distinguished road
Hello, everybody.

I've been trying to model a 2D (obviously) airfoil in Ansys. Since this was my first time with this software, I followed a YouTube video ( of a guy that does the same thing only with another airfoil (non symmetric one). The thing is that I do exactly everything the guy does, but yet the results are wrong. I get a 2.36e-3 lift coefficient (about 2.7 N of lift force) when I should be getting at least something smaller (e-6, for example).

I have checked the geometry, mesh and setup multiple times. I even started from scratch several times, yet I get the same results time and time again.

My mesh is totally symmetric (image attached) and the y_plus requirements are met (I get a 0.5 max y_plus, check the results image attached). I am using the k-omega model for turbulence. My velocity is 43.8m/s at 0 AOA, fluid is air, obviously (rho=1.225 kg/m^3 and mu=1.7894e-05 Pa s).

I have also tried other AOA and the results are wrong too, and it is not close (I compare my CFD results with experimental data).

What can I do?

Thanks in advance!

P.S I hope I have provided enough info. If not, lmk.
Attached Images
File Type: jpg 2.jpg (178.2 KB, 2 views)
File Type: png 1.png (112.7 KB, 0 views)
TomTheEngineer is offline   Reply With Quote


airfoil 2d, lift and drag calculation

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Airfoil Coefficient of Lift and Drag - Published Data vs CFD Results Mick2450 CFX 4 April 23, 2020 19:18
Fluent 19.0 Lift and Drag Coefficient Monitors TeriSerugi FLUENT 0 February 6, 2019 17:21
[snappyHexMesh] sHM layer process keeps getting killed MBttR OpenFOAM Meshing & Mesh Conversion 4 August 15, 2016 03:21
snappyhexmesh remove blockmesh geometry philipp1 OpenFOAM Running, Solving & CFD 2 December 12, 2014 10:58
Wrong Drag and Lift Coefficient when changing AoA inspiron FLUENT 1 November 27, 2013 13:00

All times are GMT -4. The time now is 20:40.