Lift and drag coefficient calculation

Lowt3ch · March 4, 2018, 12:23

Dear all,
I am attempting a CFD simulation with no formal training, only basic fluid dynamics. I am attempting to validate the use of a 2D CFD method so I can use it in my project. The aerofoil I am simulating is called NACA 24112; I am simulating it at 3.5 deg angle of attack and at 1mm chord scale. Due to the scale of my model in order to have a Reynolds number of 50,000 I would need to simulate at 700m/s which is beyond the method I am using.

http://airfoiltools.com/airfoil/deta...4112-jf#polars

My values of lift and drag co-efficient are HIGHLY dependent on the velocity of the flow which means I cannot match my data to the given data. The velocity profile seems reasonable. Can anyone help me validate this?

shereez234 · March 5, 2018, 12:04

How about trying to modify the dynamic viscosity at the inlet instead of modifying velocity? 700m/s is hypersonic speed.

March 4, 2018, 12:23	Lift and drag coefficient calculation	#1
Lowt3ch New Member Andre Join Date: Mar 2018 Posts: 1 Rep Power: 0	Dear all, I am attempting a CFD simulation with no formal training, only basic fluid dynamics. I am attempting to validate the use of a 2D CFD method so I can use it in my project. The aerofoil I am simulating is called NACA 24112; I am simulating it at 3.5 deg angle of attack and at 1mm chord scale. Due to the scale of my model in order to have a Reynolds number of 50,000 I would need to simulate at 700m/s which is beyond the method I am using. http://airfoiltools.com/airfoil/deta...4112-jf#polars My values of lift and drag co-efficient are HIGHLY dependent on the velocity of the flow which means I cannot match my data to the given data. The velocity profile seems reasonable. Can anyone help me validate this?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Calculation of lift and drag coefficients on airfoil	CoolHersheys	OpenFOAM Post-Processing	5	September 27, 2021 07:04
wrong SU2 calculation for lift and drag coefficient for NAC4421	mechy	SU2	7	January 9, 2017 06:18
Calculation of drag and lift coefficient in flow around a semi-cylinder shape	Lorenzo C.	FLUENT	0	November 18, 2016 14:47
Drag and Lift coefficient calculation	viraj	Main CFD Forum	0	February 5, 2010 06:41
Automotive test case	vinz	OpenFOAM Running, Solving & CFD	98	October 27, 2008 09:43

March 5, 2018, 12:04		#2
shereez234 Senior Member M Sereez Join Date: Jan 2014 Location: England Posts: 353 Blog Entries: 1 Rep Power: 13	How about trying to modify the dynamic viscosity at the inlet instead of modifying velocity? 700m/s is hypersonic speed.