Analysis of particle-laden fluid flows, tortuosity and particle-fluid behaviour in metal foam heat exchangers

Kuruneru, STW; Sauret, E; Vafai, K; Saha, SC; Gu, YT

Analysis of particle-laden fluid flows, tortuosity and particle-fluid behaviour in metal foam heat exchangers

Kuruneru, STW Sauret, E Vafai, K Saha, SC

Gu, YT

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Publication Type:: Journal Article
Citation:: Chemical Engineering Science, 2017, 172 pp. 677 - 687
Issue Date:: 2017-01-01

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Field	Value	Language
dc.contributor.author	Kuruneru, STW	en_US
dc.contributor.author	Sauret, E	en_US
dc.contributor.author	Vafai, K	en_US
dc.contributor.author	Saha, SC https://orcid.org/0000-0002-9962-8919	en_US
dc.contributor.author	Gu, YT	en_US
dc.date.issued	2017-01-01	en_US
dc.identifier.citation	Chemical Engineering Science, 2017, 172 pp. 677 - 687	en_US
dc.identifier.issn	0009-2509	en_US
dc.identifier.uri	http://hdl.handle.net/10453/123461
dc.description.abstract	© 2017 Elsevier Ltd Tortuosity and porosity are critical parameters for characterizing fluid flow in porous media. These parameters are of paramount importance in the design of porous compact heat exchangers, packed bed reactors, and catalysis supports; however, in the context of heat exchangers, these parameters are generally formulated for single-phase fluid flow under steady-state conditions. However, most industrial flows in a porous medium such as metal foams comprise of transient particle-laden fluid flow. A coupled finite volume and discrete element method (FVM-DEM) is developed to examine transient particle-laden Stokesian flow, particulate fouling (deposition), and fluid flow patterns in an idealized porous metal foam. This work presents a comparative analysis of the analytical and numerical pressure drop profiles. The solid-gas suspension in a porous media is discussed. Secondly, a new time-dependent pore-level fluid tortuosity relation is established which is linked with a modified porosity-based Darcy-Forchheimer equation. Fluid disturbance attributable to the inception of particle deposition is quantified by the tortuosity and instantaneous shift in streamline angle ratio. It is shown that the streamline angle ratio and the meandering of fluid flow paths vary with changing porosity and tortuosity. Moreover, the Reynolds number and particle density play a critical role in the alteration of the resistance to fluid flow and permeability which is related to the tortuosity and variation in fluid flow behaviour. The results and numerical method serves as a steppingstone to better optimize various heat exchangers while taking into account complex multiphase flow behaviour and the tortuous flow paths of porous structures.	en_US
dc.relation.ispartof	Chemical Engineering Science	en_US
dc.relation.isbasedon	10.1016/j.ces.2017.07.027	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Chemical Engineering	en_US
dc.title	Analysis of particle-laden fluid flows, tortuosity and particle-fluid behaviour in metal foam heat exchangers	en_US
dc.type	Journal Article
utslib.citation.volume	172	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0913 Mechanical Engineering	en_US
utslib.for	0914 Resources Engineering and Extractive Metallurgy	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	closed_access	*
pubs.publication-status	Published	en_US
pubs.volume	172	en_US

Abstract:

© 2017 Elsevier Ltd Tortuosity and porosity are critical parameters for characterizing fluid flow in porous media. These parameters are of paramount importance in the design of porous compact heat exchangers, packed bed reactors, and catalysis supports; however, in the context of heat exchangers, these parameters are generally formulated for single-phase fluid flow under steady-state conditions. However, most industrial flows in a porous medium such as metal foams comprise of transient particle-laden fluid flow. A coupled finite volume and discrete element method (FVM-DEM) is developed to examine transient particle-laden Stokesian flow, particulate fouling (deposition), and fluid flow patterns in an idealized porous metal foam. This work presents a comparative analysis of the analytical and numerical pressure drop profiles. The solid-gas suspension in a porous media is discussed. Secondly, a new time-dependent pore-level fluid tortuosity relation is established which is linked with a modified porosity-based Darcy-Forchheimer equation. Fluid disturbance attributable to the inception of particle deposition is quantified by the tortuosity and instantaneous shift in streamline angle ratio. It is shown that the streamline angle ratio and the meandering of fluid flow paths vary with changing porosity and tortuosity. Moreover, the Reynolds number and particle density play a critical role in the alteration of the resistance to fluid flow and permeability which is related to the tortuosity and variation in fluid flow behaviour. The results and numerical method serves as a steppingstone to better optimize various heat exchangers while taking into account complex multiphase flow behaviour and the tortuous flow paths of porous structures.

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http://hdl.handle.net/10453/123461