I'm a beginner in the field. now i am confused about some settings.
i'm doing a analysis job to compare the difference between a car with rear wing and the other one without rear wing.
first, i don't sure which car (the one with rear wing or the one without rear wing)should have a bigger cd value, somebody says that cars with rear wings will increase drag as well as downforce, is that right ?
second, i always get cl values about -2.xxx, but the values seem to be too large. as i google some similar papers to check the results, their cl values are about -0.2xxx.
so, plz me to check if there are any mistakes settings that need to be corrected.!
there are my settings below: (i change these settings only, the others are default)
-i use 1: 1 2d cars, created by spaceclaim. i set up the cars with 4875mm 1780mm 1435mm, so should i change the unit in ansys workbench into mm ?
-viscous model: k-e
-inlet 30 m/s (velocity inlet)
-reference values:
area : 2.09 m^2 (frontal area of the car)
depth: 1.58 m (car width)
length: 1.78 m (car length)
velocity: 30 m/s (should i give the velocity again here? i have given velocity inlet 30 m/s already)
after these i run 500 iterations