CL Front and CL Rear

July 28, 2003, 22:11

hello, everyone... Anybody know how to define the CLF(lift front) and CLR (rear) by using StarCd... Normally, starcd gave the overall body fo the lift coeeficient.

I really appreciate if anybody can reply me problem..

thank u.. best regard

therry henry...

July 30, 2003, 10:50

I think the command ACOEF works only with a current selected set of wall shells... so if you only selected the 'front' of your model then you'll get the force coefficient for just that part. Repeat for the wall shells of the 'rear'.

July 31, 2003, 23:36

hay cjtune... thank you for your feedback..is there any simple way to devide the car body.., by using COG location maybe.. .. Where is the limit for the CLfront and CLrear? thank you.. buddy

regards

August 1, 2003, 03:30

Divide at center of gravity? To determine which halve is 'front' and which 'rear'? No idea for cars. With aerofoils it's easy since your have the chord line.

Perhaps where you want to get the CL depends on your area of interest. Say if you want to optimise the slope of the rear windscreen to reduce drag, you might do just as good to just plot out the CL only for that portion.

July 28, 2003, 22:11	CL Front and CL Rear	#1
therry henry Guest Posts: n/a	hello, everyone... Anybody know how to define the CLF(lift front) and CLR (rear) by using StarCd... Normally, starcd gave the overall body fo the lift coeeficient. I really appreciate if anybody can reply me problem.. thank u.. best regard therry henry...

July 30, 2003, 10:50	Re: CL Front and CL Rear	#2
cjtune Guest Posts: n/a	I think the command ACOEF works only with a current selected set of wall shells... so if you only selected the 'front' of your model then you'll get the force coefficient for just that part. Repeat for the wall shells of the 'rear'.

July 31, 2003, 23:36	Re: CL Front and CL Rear	#3
therry henry Guest Posts: n/a	hay cjtune... thank you for your feedback..is there any simple way to devide the car body.., by using COG location maybe.. .. Where is the limit for the CLfront and CLrear? thank you.. buddy regards

August 1, 2003, 03:30	Re: CL Front and CL Rear	#4
cjtune Guest Posts: n/a	Divide at center of gravity? To determine which halve is 'front' and which 'rear'? No idea for cars. With aerofoils it's easy since your have the chord line. Perhaps where you want to get the CL depends on your area of interest. Say if you want to optimise the slope of the rear windscreen to reduce drag, you might do just as good to just plot out the CL only for that portion.

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