I got a question perhaps regarding the issue of ground effect influence. I did a simulation on our formula SAE car of 2015 to learn about aerodynamics and their influence. So now I was wondering…
In our old system that we used to use the diffuser had around 100N downforce (for half of the car). In Simscale together with the Sidewings I was wondering to have an outcome of only 28N Downforce for half of the car.
Then I wanted to separate these two components to look out for the downforce loss and I was shocked to watch the diffuser with 40N Lift instead of Downforce and the sidewings got 68N downforce. How’s that possible. It is the same car as in the old system that we originally used but did not want anymore. The difference between more accurate Simscale and the old system was that Simscale uses ground speed and the old one uses wind speed (no moving floor). What has happened here? What could be the cause? Could it be an effect influence like Ground effect?
Has anybody gotten to deal with this problem yet?
I am happy for every hint and answer.
Thanks in advance.