12. Start with Equation IVb.2.8 and obtain Equation IVb.2.9. For this purpose, first ignore the non-linear term compared with the two dominant terms. Then sub- stitute for the velocity and temperature profiles. To develop the integral, consider a case where the hydrodynamic boundary layer is thicker than the thermal bound- ary layer (thus the integral is zero for y > 8'). Arrange the result in terms of = 8'18 and ignore *.
12. Start with Equation IVb.2.8 and obtain Equation IVb.2.9. For this purpose, first ignore the non-linear term compared with the two dominant terms. Then sub- stitute for the velocity and temperature profiles. To develop the integral, consider a case where the hydrodynamic boundary layer is thicker than the thermal bound- ary layer (thus the integral is zero for y > 8'). Arrange the result in terms of = 8'18 and ignore *.
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter7: Forced Convection Inside Tubes And Ducts
Section: Chapter Questions
Problem 7.7P
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