An Investigation of some Turbulent Boundary Layer Parameters.
Hanna, S., Saad El-Deen, M., El-Badrawy, R. (1981). An Investigation of some Turbulent Boundary Layer Parameters.. EKB Journal Management System, 6(1), 138-158. doi: 10.21608/bfemu.2021.181754
Samir F. Hanna; Mohamed S. Saad El-Deen; Rashad M. El-Badrawy. "An Investigation of some Turbulent Boundary Layer Parameters.". EKB Journal Management System, 6, 1, 1981, 138-158. doi: 10.21608/bfemu.2021.181754
Hanna, S., Saad El-Deen, M., El-Badrawy, R. (1981). 'An Investigation of some Turbulent Boundary Layer Parameters.', EKB Journal Management System, 6(1), pp. 138-158. doi: 10.21608/bfemu.2021.181754
Hanna, S., Saad El-Deen, M., El-Badrawy, R. An Investigation of some Turbulent Boundary Layer Parameters.. EKB Journal Management System, 1981; 6(1): 138-158. doi: 10.21608/bfemu.2021.181754

An Investigation of some Turbulent Boundary Layer Parameters.

MEJ- Mansoura Engineering Journal
Article 10, Volume 6, Issue 1, June 1981, Page 138-158  XML PDF (2.14 MB)
Document Type: Research Studies
DOI: 10.21608/bfemu.2021.181754
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Authors
Samir F. Hanna* 1; Mohamed S. Saad El-Deen2; Rashad M. El-Badrawy1
1Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt.
2Mechanical Power engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.
Abstract
In turbulent boundary layer problems, the velocity defect law suggested by Coles consists of two-universal functions; the law of the wall and the law of the wake. This defect law agrees very well with experiments for turbulent boundary layers, only at momentum Reynolds number Re ẟӿӿ> 6000. 
In the present work the wake function is modified to satisfy in such away simulatanously the normalizing conditions stated by Coles and the variation in the empirical constant & with Re ẟӿӿ  (without any restrictions) and the velocity profile parameter P. 
The new modification in ﬡand wake functions provides the possibility of studying the velocity profile and the different parameters controlling the behaviour of the turbulent boundary layer efficiently. 
 
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