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Research article - Peer-reviewed, 2022

Experimental and Pore-Scale Analysis of Flow and Thermal Fields in a Packed Bed Channel

Khaljani, Mansoureh; Nazari, Meysam; Azarpeyvand, Mahdi; Mahmoudi, Yasser

Abstract

The study investigates experimentally and numerically the problem of turbulent convective heat transfer and pressure drop in a packed bed with internal heat generation. The main objective is to develop correlations for the heat transfer between the bed and coolant as well as the pressure drop in the system using detailed experimental and 3-dimensional pore-scale numerical simulation. The system analyzed is a horizontal circular channel filled with different stainless steel spheres with diameters of 5.5 mm, 6.5 mm, and 7.5 mm. Dry air is used as working fluid. The study is performed for turbulent flow regimes with different Reynolds number (based on the spheres diameter) in the range of 900-2600. The spheres are heated using an electromagnetic induction heating method. Based on the experimental data, empirical correlations for turbulent pressure drop and convective heat transfer coefficient are developed. Results of pore-scale analysis show the complexity of the flow domain, which the velocity experiences a considerable increase compared to inlet velocity and is more evident in narrow gaps between spheres. Moreover, numerical results indicate the coupling of temperature and velocity fields, which a nonuniform velocity filed leads to nonuniform temperature distributions of air and solid spheres in the packed bed.

Published in

Heat Transfer Engineering
2022, volume: 43, number: 13, pages: 1119-1134
Publisher: TAYLOR & FRANCIS INC

Authors' information

Khaljani, Mansoureh
Queens University Belfast
Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology
Azarpeyvand, Mahdi
University of Bristol
Mahmoudi, Yasser
University of Manchester
Mahmoudi, Yasser
Queens University Belfast

UKÄ Subject classification

Energy Engineering

Publication Identifiers

DOI: https://doi.org/10.1080/01457632.2021.1943846

URI (permanent link to this page)

https://res.slu.se/id/publ/113045