# Is the drag coefficient right?

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 July 12, 2006, 22:14 Is the drag coefficient right? #1 mimibenben Guest   Posts: n/a How to know you get the right number of drag coefficient,lift coefficient and moment coefficient? Or generally,how big are these coefficients? and THANKS A LOT!

 July 13, 2006, 02:22 Re: Is the drag coefficient right? #2 ramp Guest   Posts: n/a Compare the values you obtain with some experimental or computational results available in the literature. well, the drag values depends on the flow type and schematics... for instance.. at low Re flow (creeping flows), the value may be of the order of 1000 but at high Re it may of the order of 1....

 July 13, 2006, 22:08 Re: Is the drag coefficient right? #3 mimibenben Guest   Posts: n/a My question: 3D missile,Mach=0.6,coupled,explicit,steady, pressure-far-field:guage pressure=101000, pressure-outlet:guage pressure=101000, my caculation results: drag coefficient = 3.335276 lift coefficient = 0.001501 moment coefficient = 0.001899 and I'm not sure if the results are right,could you help me? Thanks a lot!!!!!

 July 13, 2006, 22:14 Re: Is the drag coefficient right? #4 mimibenben Guest   Posts: n/a By the way, My referencearea=PI*missileRadius^2=8.5609608 referencelength=missilelength=51.304

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