A visualization study of turbulent spots in water channel flow

Sattaya YIMPRASERT; Daisuke IMADA; Masaharu MATSUBARA

doi:10.1299/jsmehs.2017.54.A042

2017.54

Session ID : A042

DOI https://doi.org/10.1299/jsmehs.2017.54.A042

Conference information

Host: The Japan Society of Mechanical Engineers

Name : [in Japanese]

Date : March 09, 2017 -

A visualization study of turbulent spots in water channel flow

Sattaya YIMPRASERT, Daisuke IMADA, Masaharu MATSUBARA

Author information

Keywords: Turbulent flow, Turbulent spot, Transition, polymer particle, water channel flow, flow visualization

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Abstract

In this experiment, a natural transition of turbulent spots in a water channel flow was observed. With addition of polymer as we know the polymer particles suspended in water affect to turbulent flow in pipe and channels, skin friction decrease. In this study, the effect of Polyacrylamide (PAM) dosing in water channel flow to the turbulent spot is observed. We investigate growing rate of the spot, to know how the polymer change generation of turbulent on the boundary between laminar and turbulent at the edges of the spot.

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