Lecture 25 : Similarity Solution of Boundary Layer Equation

[@pulastya09]

Thank you very much Sir.

[@tamilolidurai6043]

Thank you Professor.

[@apoorvmishra6992]

At 32:00, what does it mean numerically calculate? We have already assumed F=0 at wall, then how do we change the value like this in the middle? F'' should be 0, shouldn't it?

[@arashjitsingh5828]

It's drag force, that he is calculating on the plate.

[@tatipallisateesh8994]

Can anyone explain drag and skin friction difference

[@suryakarla8628]

I think drag takes into account both wall drag (caused by shear stress) and also form drag (caused by pressure). Where as skin friction accounts only for wall drag.

[@ItsMauiBruh]

Drag has many different components especially when considering a 3D airfoil. In the boundary layer equations it is important to identify the velocity profile and consequently wall sheer stress because the skin friction is the main component of drag in a 2D sense. What you need to know is skin friction is drag, but only one component of the very complicated total drag.

[@tatipallisateesh8994]

@@suryakarla8628 thank you for response

[@tatipallisateesh8994]

@@ItsMauiBruh thank you for response

[@safdar9688]

Informative lecture sir