4-1. Repeat the momentum-integral analysis of the flat plate in Sec. 4-1 for Pohlhausen's cubic polynomial...

 

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4-1. Repeat the momentum-integral analysis of the flat plate in Sec. 4-1 for Pohlhausen's cubic polynomial profile =3() - ² (²) ² [Pohlhausen (1921)] where 8(x) is the boundary-layer or disturbance thickness as pictured in Fig. P4-1. Is this profile any more (or less) realis- tic than the approximation of Eq. (4-11)? For the above profile, compute (a) (0/x)√/Re; (b) (6*/x)√/Re; (c) (8/x)√/Re; (d) C√Re: (e) C√ Rex. Answers: (a) 0.646, (b) 1.740, (c) 4.64, (d) 0.646, (e) 1.293 8(x) FIGURE P4-1 4-1. Repeat the momentum-integral analysis of the flat plate in Sec. 4-1 for Pohlhausen's cubic polynomial profile =3() - ² (²) ² [Pohlhausen (1921)] where 8(x) is the boundary-layer or disturbance thickness as pictured in Fig. P4-1. Is this profile any more (or less) realis- tic than the approximation of Eq. (4-11)? For the above profile, compute (a) (0/x)√/Re; (b) (6*/x)√/Re; (c) (8/x)√/Re; (d) C√Re: (e) C√ Rex. Answers: (a) 0.646, (b) 1.740, (c) 4.64, (d) 0.646, (e) 1.293 8(x) FIGURE P4-1

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