pressure coefficient greater than one

ajayvarma5 · February 23, 2016, 01:10

Im using fluent for analyzing flow on a 2d wing. my flow speeds are around 30m/s . solver settings are : pressure based, k-w SST, boudary conditions are
velocity inlet , pressure outlet,top(wall),bottom(wall),aerofoil (wall). i have done modeling in icem cfd with 7lakh quad mesh and i have used farfield distance for about 5 times of the chord due to computational constraints. i m having problem with increase in the angle of attack.that is pressure coeffiecient value is going higher than that of 1 when i increase my angle to 4 degree. can someone pls help me

.

LuckyTran · February 24, 2016, 01:21

Check your reference values. Make sure you have specified the correct reference velocity, length, etc.

ajayvarma5 · April 2, 2016, 02:17

how should we calculate reference values, if there is any way please kindly specify thank you

February 23, 2016, 01:10	pressure coefficient greater than one	#1
ajayvarma5 New Member ajay varma Join Date: Dec 2015 Location: india Posts: 7 Rep Power: 10	Im using fluent for analyzing flow on a 2d wing. my flow speeds are around 30m/s . solver settings are : pressure based, k-w SST, boudary conditions are velocity inlet , pressure outlet,top(wall),bottom(wall),aerofoil (wall). i have done modeling in icem cfd with 7lakh quad mesh and i have used farfield distance for about 5 times of the chord due to computational constraints. i m having problem with increase in the angle of attack.that is pressure coeffiecient value is going higher than that of 1 when i increase my angle to 4 degree. can someone pls help me.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Pressure coefficient	Giuseppe	FLUENT	2	July 26, 2015 03:19
simpleFoam - pressure (coefficient) of head shape	GJM1991	OpenFOAM Running, Solving & CFD	4	May 12, 2015 17:15
Water subcooled boiling	Attesz	CFX	7	January 5, 2013 03:32
lid-driven cavity in matlab using BiCGStab	Don456	Main CFD Forum	1	January 19, 2012 15:00
Does star cd takes reference pressure?	monica	Siemens	1	April 19, 2007 11:26

February 24, 2016, 01:21		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,735 Rep Power: 66	Check your reference values. Make sure you have specified the correct reference velocity, length, etc.

April 2, 2016, 02:17		#3
ajayvarma5 New Member ajay varma Join Date: Dec 2015 Location: india Posts: 7 Rep Power: 10	how should we calculate reference values, if there is any way please kindly specify thank you