Response of the Fully Developed Pipe Flow to Rough Wall Disturbances (Mean Velocity Field)

• WIN Aung Thuyein

  Department of Mechanical Engineering, Yamaguchi University

• MOCHIZUKI Shinsuke

  Department of Mechanical Engineering, Yamaguchi University

• KAMEDA Takatsugu

  Department of Mechanical Engineering, Yamaguchi University

Abstract

An experimental study was conducted in order to clarify the response of the fully developed pipe flow to d- and k-type wall roughness of various streamwise lengths. The measurements were set to emphasize on the response processes, which are deformation and relaxation of the mean velocity profile related to the strength and type of roughness. Under the same effective pressure drop, comparison of the mean velocity profiles and three common characteristics of boundary layer thicknesses (displacement, momentum, and energy) revealed that the initial stage of the response to the flow depends on the type of roughness. The total recovery length until the fully developed state depends only on the effective pressure drop caused by the rough wall.

Journal

• Journal of Fluid Science and Technology

  Journal of Fluid Science and Technology 5 (2), 340-350, 2010

  The Japan Society of Mechanical Engineers

Keywords

• Pipe Flow
• Rough Wall
• Response
• Turbulent Structure
• d-type and k-type Roughness

Details

• CRID: 1390001205247081856
• NII Article ID: 130000303622
• DOI: 10.1299/jfst.5.340
• ISSN: 18805558
• Web Site: https://petit.lib.yamaguchi-u.ac.jp/18239
• Web Site: http://www.jstage.jst.go.jp/article/jfst/5/2/5_2_340/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed