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Reverse flow phenomena of a polyacrylamide solution in a channel with an obstacle at the entry : influence of obstruction geometry

journal contribution
posted on 06.12.2017, 00:00 authored by M Kabir, Mohammad KhanMohammad Khan, Mohammad RasulMohammad Rasul
This study investigates the reverse-flow phenomena of a polyacrylamide solution in a channel referred to as a “test channel” with obstruction geometry at the entry placed in another wider parallel-walled channel. The influence of various obstruction geometries (i.e., shapes and sizes) plays a very important role in controlling reverse-flow behavior and is investigated in this study. The obstruction geometries used in this research were: flat plate, semicircle, circle, triangle, and rectangle with various aspect ratios. Experimental investigation and numerical simulations were carried out with a non-Newtonian 0.03% (by weight) polyacrylamide solution that obeys a power-law behavior for a fixed Reynolds number of 2000. The non-Newtonian fluid results are compared with that of water. The flat plate produced the maximum reverse flow at a gap-to-width (g/w) ratio of 1, whereas the triangle produced minimum reverse flow at a g/w ratio of 0.5. The circular geometry produced the maximum forward flow, and the flat plate produced the minimum forward flow at a g/w ratio of 8. Good agreement has been observed between the experimental results and numerical simulations.

Funding

Category 3 - Industry and Other Research Income

History

Volume

199

Issue

6

Start Page

689

End Page

709

Number of Pages

21

eISSN

1563-5201

ISSN

0098-6445

Location

United States

Publisher

Taylor and Francis

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

School of Engineering and Technology (2013- ); TBA Research Institute;

Era Eligible

Yes

Journal

Chemical engineering communications.