Title: Comparative analysis on heat transfer, between a steady and oscillating jet in a cavity

Authors: Farida Iachachene; Amina Mataoui

Addresses: Laboratory of Energy, Mechanics and Engineering (LEMI), University M'Hamed Bougara Boumerdes, Boumerdes 35000, Algeria ' Faculty of Physics, University of Science and Technology Houari Boumediene, Algeria

Abstract: This paper numerically investigates the cooling of a heated rectangular cavity by a cold slot jet. The study aims to examine the effect of the jet location inside the cavity (L_f and L_h) and Reynolds number on heat transfer, using URANS turbulence modelling. Different flow behaviours, including oscillatory and steady flows, are generated depending on the jet location inside the cavity. The study identifies and discusses the optimal jet locations for achieving optimal cavity cooling. The results indicate that the lateral placement of the jet has a negligible effect on heat transfer across all cavity walls. Additionally, oscillatory flow consistently expands the heat exchange zone along all three walls, resulting in a wider effective exchange area compared to steady flow conditions. The study proposes optimised jet positions within the cavity for specific wall cooling requirements. By considering the optimal combination of jet height and impinging distance, the cooling performance can be optimised.

Keywords: jet-cavity interaction; heat transfer; URANS; finite volume method; oscillatory flow; steady flow; slow jet; CFD; jet location; optimal jet locations.

DOI: 10.1504/PCFD.2024.142059

Progress in Computational Fluid Dynamics, An International Journal, 2024 Vol.24 No.6, pp.352 - 366

Received: 15 Jul 2023
Accepted: 31 Dec 2023
Published online: 07 Oct 2024 *

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