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Technical Briefs

Hot-Wire Anemometry for Velocity Measurements in Nanopowder Flows

[+] Author and Article Information
Sergey P. Bardakhanov

 Khristianovich Institute of Theoretical and Applied Mechanics, Novosibirsk 630090, Russia; School of Mechanical Engineering, Yeungnam University, Gyongsan 712-749, Koreabard@itam.nsc.ru

Sang W. Joo1

School of Mechanical Engineering, Yeungnam University, Gyongsan 712-749, Koreaswjoo@yumail.ac.kr

1

Corresponding author.

J. Fluids Eng 131(3), 034501 (Feb 04, 2009) (4 pages) doi:10.1115/1.3077140 History: Received February 08, 2008; Revised December 21, 2008; Published February 04, 2009

A new technique for velocity-field measurements in fine granular systems is introduced. The hot-wire anemometry, mainly used for gaseous flows, is applied to nanopowders and is found to be a viable experimental method for flow measurements. A generic chute flow of aluminum oxide C and Aerosil A-90 and A-380 powders through a vertical channel is chosen as a test platform, and the results suggest that the hot-wire anemometry is a favorable option for nanopowder measurements.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Experimental apparatus: (a) full view and (b) part A magnified; (1) shutter and (2) cone controller

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Figure 2

(a) Free surface motion and (b) hot-wire signal of powder flow in the vertical pipe; the height of the powder is 100 cm and the hot-wire is located at the center

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Figure 3

Calibration curves of hot-wire probe: (a) air and (b) powder

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Figure 4

Velocity profile of Savage (13) (solid line), Savage (4)(Δ), Gutfraind and Pouliquen (12)(+), and the present experimental result for case VII (◻)

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