NACA 0012 Verification

isaac1326 · October 4, 2019, 11:30

I have used the mesh from https://turbmodels.larc.nasa.gov/naca0012_grids.html. I have used the command plot3dToFoam to convert the p2dfmt of 896X512 points to Foam Mesh. I am using SA method, I am getting negative Cd values. the min y+ value is 0.007.
Link to the Files: https://drive.google.com/file/d/1TO8...ew?usp=sharing

thiagopl · October 4, 2019, 13:14

Hi isaac1326,

I saw that you changed the velocity vector direction to simulate the angle of attack. Once you did that, you have also to change the direction of the vector in which the OF calculates de lift (liftDir) and drag (dragDir). By definition, the lift vector is perpendicular to the free stream velocity and the drag is parallel to the same vector.

Also, might try to reduce your residuals (and increase you endTime if you do so).

Regards,

klausb · October 15, 2020, 17:56

You could create the mesh yourself using: https://sourceforge.net/projects/construct2d/

To change the AOA (angle of attack) it's usually easier to rotate the mesh using OpenFOAMs rotateMesh

HPE · December 12, 2021, 06:44

NACA0012 validation with OF v4 and OF v2006

October 4, 2019, 11:30	NACA 0012 Verification	#1
isaac1326 New Member Isaac Join Date: Feb 2013 Posts: 27 Rep Power: 14	I have used the mesh from https://turbmodels.larc.nasa.gov/naca0012_grids.html. I have used the command plot3dToFoam to convert the p2dfmt of 896X512 points to Foam Mesh. I am using SA method, I am getting negative Cd values. the min y+ value is 0.007. Link to the Files: https://drive.google.com/file/d/1TO8...ew?usp=sharing

October 4, 2019, 13:14		#2
thiagopl Member Thiago Parente Lima Join Date: Sep 2011 Location: Diamantina, Brazil. Posts: 76 Rep Power: 15	Hi isaac1326, I saw that you changed the velocity vector direction to simulate the angle of attack. Once you did that, you have also to change the direction of the vector in which the OF calculates de lift (liftDir) and drag (dragDir). By definition, the lift vector is perpendicular to the free stream velocity and the drag is parallel to the same vector. Also, might try to reduce your residuals (and increase you endTime if you do so). Regards, __________________ Field of interest: heat transer. OpenFOAM Foundation's distribution user.

December 12, 2021, 06:44		#4
HPE Senior Member Herpes Free Engineer Join Date: Sep 2019 Location: The Home Under The Ground with the Lost Boys Posts: 931 Rep Power: 13	NACA0012 validation with OF v4 and OF v2006 __________________ The OpenFOAM community is the biggest contributor to OpenFOAM: User guide/Wiki-1/Wiki-2/Code guide/Code Wiki/Journal Nilsson/Guerrero/Holzinger/Holzmann/Nagy/Santos/Nozaki/Jasak/Primer Governance Bugs/Features: OpenFOAM (ESI-OpenCFD-Trademark) Bugs/Features: FOAM-Extend (Wikki-FSB) Bugs: OpenFOAM.org How to create a MWE New: Forkable OpenFOAM mirror

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
NACA 0012 Airfoil, simpleFoam, Spalart Allmaras	badwalgurpreet	OpenFOAM Running, Solving & CFD	12	October 28, 2024 03:03
Data for NACA 0012	Muntazir	Main CFD Forum	1	March 28, 2023 01:59
XFlow Naca 0012 Validation	Mythorpios	Main CFD Forum	1	June 27, 2016 13:05
How to import NACA 0012 Profile in Gridgen	maplepink	Main CFD Forum	17	May 7, 2013 13:01
NACA 0012 simulation results	Luis	FLUENT	3	February 15, 2006 11:42

October 15, 2020, 17:56		#3
klausb Senior Member Klaus Join Date: Mar 2009 Posts: 299 Rep Power: 23	You could create the mesh yourself using: https://sourceforge.net/projects/construct2d/ To change the AOA (angle of attack) it's usually easier to rotate the mesh using OpenFOAMs rotateMesh