Direct measurement of bottom shear stress under high-velocity flow conditions

Jae Hyeon Park, Young Do Kim (Lead / Corresponding author), Yong Sung Park, Jae An Jo, Kimchhun Kang

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The objectives of the present research are to accurately measure bottom shear stress under high-velocity flow conditions. To achieve high-velocity flow conditions, a laboratory-scale flume has been specially built in which flow velocity can reach over 3 m s 1. Also an instrument that can directly measure bottom shear stress has been developed and validated. Then, the flow resistance has been estimated by simultaneously measuring flow velocity and bottom shear stress. It appears that the shear stress is indeed proportional to velocity squared and also to Reynolds number. On the other hand, Manning's n value and the skin friction factor are more or less uniform across all experimental cases.

Original languageEnglish
Pages (from-to)121-127
Number of pages7
JournalFlow Measurement and Instrumentation
Volume50
Early online date30 Dec 2015
DOIs
Publication statusPublished - Aug 2016

Keywords

  • Direct bottom shear stress measurement
  • Flow resistance
  • High-velocity flow

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