Quote:
Originally Posted by trebuchet03
That advice comes from ignorant users.... I don't mean the word ignorant as an insult, however 
If your car is a Mtisubishi Lancer - 100mm is correct.... Otherwise, it depends on the car, where flow starts to separate etc.
For example - the Fusion 999.... I don't necessarily see why it should be added.... |
Ok, well, yeah....
Without the tools that you have here one can only make an educated guess. The Lancer has a very similar body style to a Jetta, so I don't see why this would be too much different. But you are absolutely right, it depends on the car and where the flow begins to separate. So, hopefully we learn it from your simulations! Perhaps you can run a couple trials to see which placement best sends some flow down the rear glass. What do you place in the model shape to simulate this "trip"? Is it just a shape input, or does the software know its meant to trip the flow?
Did you mention that the fusion has a 20 deg. rear glass angle? That is still quite a bit more than the supposed 12 degree maximum thats so often quoted on this site. If the VGs can trip the flow to help minimize wake, they may benefit drag more than their own frontal area and turbulence negate.....?