Numerical study of adverse pressure gradient generation over a flat plate using a rotating cylinder |
| |
| Institution: | 1. East Tennessee State University, Engineering Technology, Surveying, and Digital Media Department, Johnson City, TN 37614, United States;2. The University of Alabama, Aerospace Engineering and Mechanics Department, Tuscaloosa, AL 35487-0280, United States;1. Department of Mathematics, Dhaka University of Engineering and Technology, Gazipur 1700, Bangladesh;2. Universiti Brunei Darussalam, Faculty of Science, Mathematical and Computing Sciences Group, BE 1410, Brunei;3. Department of Mathematics, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh;4. Vice Presidency for Projects, King Saud University, P.O. 70908, 11577 Riyadh, Saudi Arabia;5. Mechanical Power Dept., Faculty of Engineering-Mattaria, Helwan University, Cairo 11718, Egypt;1. Deep Sea Technologies, National Institute of Ocean Technology, Chennai, 600100, India;2. Fatigue & Fracture Group, Materials Science and Technology Division, CSIR-National Metallurgical Laboratory, Jamshedpur, 831007, India;3. School of Materials Science and Engineering, Indian Institute of Engineering, Science and Technology, Shibpur, Howrah, 711103, India;1. Division of Infectious Diseases, Department of Internal Medicine, Taichung Hospital, Ministry of Health and Welfare, Taichung, Taiwan;2. Department of Surgery, Taichung Hospital, Ministry of Health and Welfare, Taichung, Taiwan;3. Department of Pathology, Taichung Hospital, Ministry of Health and Welfare, Taichung, Taiwan;1. Department of Mechanical System Engineering, University of Hiroshima, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan;2. School of Mechanical and Electronic Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei 430070, PR China;3. State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, PR China |
| |
| Abstract: | Generating an adverse pressure gradient (APG), using a rotating cylinder in the proximity of a plane wall under a laminar freestream flow, is studied numerically in this work. The magnitude of the generated APG is a function of the gap, G, between the cylinder and the wall, and the rotational speed of the cylinder, Ω. The flow in such a configuration is characterized by periodic transient vortex shedding at high Reynolds number. A numerical model for the computation of the transient flow for this configuration is developed using the ANSYS CFD simulation tool. The model is validated against published experimental and numerical data for similar flow configurations and excellent agreement is observed. A parametric study is carried out for different combinations of G and Ω for two different Reynolds numbers of 200 and 1000 to examine the development of the resulting separation bubble due to the generated APG. The mechanism of the boundary layer separation over the plane wall and the corresponding wake dynamics is investigated. Results are presented in terms of the distribution of the pressure coefficient as well as skin friction coefficient along the wall and flow patterns around and downstream of the cylinder in the proximity of the wall. The results of these computations confirm that using a rotating cylinder over a plane wall in a freestream flow is an effective technique to generate a controlled range of adverse pressure gradients. |
| |
| Keywords: | Adverse pressure gradient Plane wall bounded flow Boundary layer separation Separation bubble Rotating cylinder Transient numerical model |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
