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A study of the flow phenomenon of water in a channel with flat plate obstruction geometry at the entry

journal contribution
posted on 06.12.2017, 00:00 by Mohd KabirMohd Kabir, Mohammad KhanMohammad Khan, Muhammed BhuiyanMuhammed Bhuiyan
The flow in a parallel walled test channel, when obstructed with a geometry at the entrance, can be forward, reverse and stagnant depending on the position of the obstruction. This interesting flow phenomenon has potential benefit in the control of energy and various flows in the process industry. In this experiment, the flat plate obstruction geometry was used as an obstruction at the entry of the test channel. The parameters that influence the flow inside and around the test channel were the gap (g) between the test channel and the obstruction geometry, the length (L) of the test channel and the Reynolds number (Re), The elfect of the gap to channel width ratio (g/w) on the magnitude of the velocity ratio (V1/Vo : velocity inside/velocity outside the test channel) was investigated for a range of Reynolds numbers, The maximum reverse flow observed was nearly 20% to 60% of the outside velocity for Reynolds number ranging from 1000 to 9000 at g/w ratio of 1.5. The maximum forward velocity inside the test channel was found 80% of the outside velocity at higher g/w ratio of 8. The effect of the test channel length on the velocity ratio was investigated for different g/w ratios and a fixed Reynolds number of 4000. The influence of the Reynolds number on the velocity ratio is also discussed and presented for different gap to width ratio (g/w). The flow visualisation photographs showing fluid motion inside and around the test channel are also presented and discussed.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

17

Issue

6

Start Page

879

End Page

887

Number of Pages

9

ISSN

1226-4865

Location

Korea

Publisher

The Korean Society of Mechanical Engineers

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Bangladesh University of Engineering and Technology; James Goldston Faculty of Engineering and Physical Systems;

Era Eligible

Yes

Journal

KSME international journal.