Pressure coefficient different by a factor of 10

tjk0113 · November 11, 2015, 01:05

So, I was remaking the NACA 4412 with the conditions given in http://web.stanford.edu/~cantwell/AA...dcock_1979.pdf ,

which should give a graph of pressure coefficient vs chord position like the one shown in http://turbmodels.larc.nasa.gov/naca4412sep_val.html.

For some reason, my coefficient is different by a factor of 10; i.e, the coefficient pressure on the y axis on my graph ranges from -0.8 ~0.2.

I have assumed ideal gas and got viscosity using sutherland, and put every conditions to my fluent as listed on the paper. I am not sure why my pressure coefficient is all divided by 10. It would be really nice if somebody could guide me through here.

LuckyTran · November 11, 2015, 09:46

Compare your reference values with the ones given in Flow Control paragraph on pg 323.

November 11, 2015, 01:05	Pressure coefficient different by a factor of 10	#1
tjk0113 New Member Tae Kim Join Date: Nov 2015 Posts: 1 Rep Power: 0	So, I was remaking the NACA 4412 with the conditions given in http://web.stanford.edu/~cantwell/AA...dcock_1979.pdf , which should give a graph of pressure coefficient vs chord position like the one shown in http://turbmodels.larc.nasa.gov/naca4412sep_val.html. For some reason, my coefficient is different by a factor of 10; i.e, the coefficient pressure on the y axis on my graph ranges from -0.8 ~0.2. I have assumed ideal gas and got viscosity using sutherland, and put every conditions to my fluent as listed on the paper. I am not sure why my pressure coefficient is all divided by 10. It would be really nice if somebody could guide me through here.

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November 11, 2015, 09:46		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 66	Compare your reference values with the ones given in Flow Control paragraph on pg 323.