The persistence of drag reduction following the injection of microbubbles into a turbulent boundary layer

Journal Article · Mon May 01 04:00:00 EDT 1995 · International Communications in Heat and Mass Transfer

DOI:https://doi.org/10.1016/0735-1933(95)00026-U· OSTI ID:78194

Kim, S Y ^[1]; Cleaver, J W ^[2]

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1. Pusan Su-San Univ. (Korea, Republic of). Dept. of Marine Engineering
2. Univ. of Liverpool (United Kingdom). Dept. of Mechanical Engineering

Data from two series of experiments has been used to investigate the way in which the reduction in wall shear stress, due to microbubble injection, changes with distance downstream of the injection region. Based on a nondimensional parameter, defined in the text, and related to the downstream distance, the free stream velocity and gas injection rate, the shear stress is found to relax exponentially to its original value. Good agreement between the two sets of data is obtained.

• OSTI ID: 78194
• Journal Information: International Communications in Heat and Mass Transfer, Journal Name: International Communications in Heat and Mass Transfer Journal Issue: 3 Vol. 22; ISSN 0735-1933; ISSN IHMTDL
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BUBBLES
DRAG
FLUID FLOW
FLUID MECHANICS
PIPES
SHEAR
STRESSES