initial conditions of Ghia (driven cavity)

HaKu · April 13, 2011, 12:07

What values Ghia et al. used in their driven cavity test problem...

density?
viscosity?
and
velocity on the upper wall???

regards

mettler · April 13, 2011, 14:26

I think I used water when I tried to verify Ghia's work. I got really close. But, as for the velocity you should non-dimensionalize everything. Then, for the lid V= 1.

Eezyville · April 13, 2011, 15:19

I would non-dimensionalize everything first then dimensionalize them with respect to the Reynolds number used. Or assume a characteristic length of 20cm, nu = 10^(-3) m^2/s, and U_lid = 2 m/s. Those were the conditions we used for her project. Its funny when I saw this thread because K. Ghia is my advisor.

mettler · April 13, 2011, 15:25

I think I did mine using the stream-function/vorticity..this was a few years ago, so I can't be 100% sure.

April 13, 2011, 12:07	initial conditions of Ghia (driven cavity)	#1
HaKu Senior Member Hassan Join Date: Apr 2009 Posts: 106 Rep Power: 17	What values Ghia et al. used in their driven cavity test problem... density? viscosity? and velocity on the upper wall??? regards

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April 13, 2011, 14:26		#2
mettler Senior Member Andrew Join Date: Mar 2009 Location: Washington, DC Posts: 209 Rep Power: 18	I think I used water when I tried to verify Ghia's work. I got really close. But, as for the velocity you should non-dimensionalize everything. Then, for the lid V= 1.

April 13, 2011, 15:19		#3
Eezyville New Member Chris Join Date: Oct 2010 Location: Toledo, OH Posts: 24 Rep Power: 15	I would non-dimensionalize everything first then dimensionalize them with respect to the Reynolds number used. Or assume a characteristic length of 20cm, nu = 10^(-3) m^2/s, and U_lid = 2 m/s. Those were the conditions we used for her project. Its funny when I saw this thread because K. Ghia is my advisor.

April 13, 2011, 15:25		#4
mettler Senior Member Andrew Join Date: Mar 2009 Location: Washington, DC Posts: 209 Rep Power: 18	I think I did mine using the stream-function/vorticity..this was a few years ago, so I can't be 100% sure.