From the texts on vehicle aerodynamics, i have learned that a better shape of a car can reduce the pressure drag involved.
What can be done to reduce the viscous drag?
Dear @Tamir, obviously everyone's objective is to reduce the total drag. I just wanted to know the fact/science behind the viscous drag.
If it's a function of total surface area and the friction coefficient alone, nothing is there to play with the shape of the body, right?
Dear Prince Abraham,
Changing the geometry affect mainly the form/pressure drag, but if for example provoking flow separation increase the form drag and reduce skin friction, but the total drag will be increased.
The best book in flow control is by
Mohamed Gad-el-Hak
" Active, and Reactive Flow Management. Cambridge University Press, England "
Best regards,
Dear Prince,
According to my own experience, roughness in a limit can decrease the friction drag but it is just in a limit and after passing a specific value it will increase the friction drag, somehow I would say it resemble to shark skin riblet. However, I draw your attention to my results in my latest project.
for more details contact me.
regards,
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