Mod-01 Lec-39 Boundary Layer Theory (Contd.)

Introduction to Fluid Mechanics and Fluid Engineering by Prof. S. Chakraborty,Department of Mechanical Engineering,IIT Kharagpur.For more details on NPTEL visit nptel.ac.in

[@omkarshinde2798]

Displacement thickness at 29:30 Momentum thickness at 39:30 timing

[@harindamodara1232]

8:15 That Equation, 22:28, Total Drag Force on the plate 22:35, Coefficient of Drag 26:15, Displacement Thickness 29:41, 39:29 Momentum Thickness Example Problem: 47:47

[@chinnaripragada2767]

Superrrr prof he was❤❤kharagpur👍

[@ashishtiwari1912]

what a genius he is.

[@phakyou]

If you're here like me, to know why they take u instead of U in momentum thickness, just understand the concept at 35:33 of _hypothetical uniform flow_ . This is what they use in Indian books.

[@angrynerd792]

This is more logical than book.

[@arkitkabir6950]

At @51:30 why cant we calculate shear stress by given dimensionless velocity ratio formula?

[@sefabektas3720]

Hi Sir, I would like to ask some questions about Re number at boundary layers: when you explained the Navier-Stokes equation for the boundary layer in the previous videos, you made some approaches to apply order magnitude analysis . One of them is high Re numbers but you did not define how high, -high enough to become turbulent or is it high but the flow is laminar? As I see we applied theories for both laminar flow and turbulent flow, How much high should Re be in terms of the applicability of scaling analysis at BLs?

[@anuragvishwakarma9092]

How will we calculate Cfx from delta/x expression

[@shaunakkhot2326]

you have the equation of wall shear stress in terms of u and u(infinity) as a differential of x just substitute and get the answer

[@prathameshdand4418]

Who after tutorial pt.