Computational fluid dynamics study of kaolin–water flow in a T-junction using a novel shear-thinning fluid model

Mohan, Anand (2023) Computational fluid dynamics study of kaolin–water flow in a T-junction using a novel shear-thinning fluid model. The Canadian Journal of Chemical Engineering, 101 (6). pp. 3624-3633. ISSN 0008-4034

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Abstract

A recently proposed shear-thinning fluid model that mimics the response of seemingly viscoplastic materials is evaluated in computational fluid dynamics simulations by studying the steady flow of a kaolin–water suspension in a 2D T-junction. The velocity profiles for the kaolin–water suspension are reported at the mid-length of the main channel and the root of the bifurcation (where recirculation is expected to appear). The velocity profiles of the proposed model are compared with those from conventional viscoplastic models (Bingham plastic model and the Herschel–Bulkley model) at low (=100) and high Reynolds number (=2000). The new model predicts a recirculation zone (at the inner edge of the bifurcation arm) that conventional models do not. The effect of the variation in the model parameters (α1 and α2) on velocity profiles at low (=100) and high Reynolds numbers (=2000) is also documented. These indicate the disappearance of the recirculation zone at low Reynolds number as α1 (equivalently, viscosity) increases, whereas the recirculation zone persists even for higher values of α1 at high Reynolds number. Further, at low Reynolds number, the skewing of maximum velocity towards the outer edge of the bifurcation arm disappears as α2 increases, whereas the skewing persists even at the highest value of α2 used at the high Reynolds number.

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IITH Creators:
IITH CreatorsORCiD
Mohan, Anandhttps://orcid.org/0000-0001-7191-4991
Item Type: Article
Uncontrolled Keywords: kaolin–water; recirculation; shear-thinning model; T-junction; viscoplastic fluid; Bifurcation (mathematics); Computational fluid dynamics; Flow of water; Kaolin; Newtonian liquids; Non Newtonian flow; Reynolds number; Shear flow; Suspensions (fluids); High Reynolds number; Kaolin–water; Recirculation zones; Recirculations; Shear-thinning; Shear-thinning model; T junctions; Thinning models; Velocity profiles; Viscoplastic fluid; Shear thinning
Subjects: Chemical Engineering
Chemical Engineering > Fluid Mechanics
Divisions: Department of Chemical Engineering
Depositing User: Mr Nigam Prasad Bisoyi
Date Deposited: 12 Nov 2023 11:13
Last Modified: 12 Nov 2023 11:13
URI: http://raiith.iith.ac.in/id/eprint/11747
Publisher URL: https://doi.org/10.1002/cjce.24755
OA policy: https://v2.sherpa.ac.uk/id/publication/6972
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