Influence of moving plate velocity on conjugate heat transfer due to the impingement of an inclined slot jet

Shashikant Pawar () and Devendra Kumar Patel
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Shashikant Pawar: School of Mechanical Engineering, Vellore Institute of Technology, Vellore, India
Devendra Kumar Patel: School of Mechanical Engineering, Vellore Institute of Technology, Vellore, India

International Journal of Modern Physics C (IJMPC), 2019, vol. 30, issue 12, 1-27

Abstract: In this paper, a dimensionless numerical study of the flow-field and heat transfer characteristics of an incompressible turbulent slot jet impinging obliquely over a moving surface of finite thickness is presented. Simulations were performed using k−ϵ eddy viscosity turbulence model. The temperature field was solved simultaneously in the solid and the fluid domain. For a fixed impingement distance and a fixed Reynolds number, the impingement angle (ϕ) and plate velocity (Up) were varied in the range of 30–75∘ and 0–0.3, respectively. In the results, the length of the potential core depends on the jet inclination, which increases with increase in jet angle. The jet angle and plate velocity have more influence on the uphill side compared to the downhill side. The location of stagnation displaces toward the uphill side as the inclination angle decreases, and the drifting of stagnation point is noted with the variation in plate velocity. The average skin-friction coefficient increases with increase in ϕ and Up, and the influence of Up on the skin-friction coefficient is reduced as ϕ increases. The maximum Nusselt number (Numax) increases with increase in ϕ, and the drifting of Numax is observed with increase in plate velocity. It is found that the average Nusselt number increases quickly with increase in plate velocity for lower angles of impingement. The distribution of local heat flux follows the same trend as the local Nusselt number.

Keywords: Impinging jet; moving plate; jet inclination; turbulent flow; conjugate heat transfer (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1142/S0129183120500060

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