Enhancement of heat transfer in turbulent separated and reattaching flow by local forcing

Gwang Hoon Rhee; Hyung Jin Sung

doi:10.1080/104077800274055

Enhancement of heat transfer in turbulent separated and reattaching flow by local forcing

Gwang Hoon Rhee, Hyung Jin Sung

Department of Mechanical and Information Engineering

Korea Advanced Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

A numerical study was made of heat transfer in locally forced turbulent separated and reattaching flow over a backward-facing step. The local forcing was given to the flow by means ofa sinusoidally oscillating jet from a separation line. The Rhee and Sung version of the unsteady k – ϵ – f_μ model and the diffusivity tensor heat transfer model were m employed. The Reynolds number was fixed at Re_H = 33,000 H and the forcing frequency was varied in the range 0 ≤ fH /U_μ ≤ 2. The condition of constant heat flux was imposed at the bottom wall. The predicted results were compared and validated with the experimental data of Chun andSung and Vogel and Eaton. The enhancement of heat transfer in turbulent separated and reattaching flow by local forcing was evaluated and analyzed.

Original language	English
Pages (from-to)	733-753
Number of pages	21
Journal	Numerical Heat Transfer; Part A: Applications
Volume	37
Issue number	7
DOIs	https://doi.org/10.1080/104077800274055
State	Published - 12 Jun 2000

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10.1080/104077800274055

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abstract = "A numerical study was made of heat transfer in locally forced turbulent separated and reattaching flow over a backward-facing step. The local forcing was given to the flow by means ofa sinusoidally oscillating jet from a separation line. The Rhee and Sung version of the unsteady k – ϵ – fμ model and the diffusivity tensor heat transfer model were m employed. The Reynolds number was fixed at ReH = 33,000 H and the forcing frequency was varied in the range 0 ≤ fH /Uμ ≤ 2. The condition of constant heat flux was imposed at the bottom wall. The predicted results were compared and validated with the experimental data of Chun andSung and Vogel and Eaton. The enhancement of heat transfer in turbulent separated and reattaching flow by local forcing was evaluated and analyzed.",

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N2 - A numerical study was made of heat transfer in locally forced turbulent separated and reattaching flow over a backward-facing step. The local forcing was given to the flow by means ofa sinusoidally oscillating jet from a separation line. The Rhee and Sung version of the unsteady k – ϵ – fμ model and the diffusivity tensor heat transfer model were m employed. The Reynolds number was fixed at ReH = 33,000 H and the forcing frequency was varied in the range 0 ≤ fH /Uμ ≤ 2. The condition of constant heat flux was imposed at the bottom wall. The predicted results were compared and validated with the experimental data of Chun andSung and Vogel and Eaton. The enhancement of heat transfer in turbulent separated and reattaching flow by local forcing was evaluated and analyzed.

AB - A numerical study was made of heat transfer in locally forced turbulent separated and reattaching flow over a backward-facing step. The local forcing was given to the flow by means ofa sinusoidally oscillating jet from a separation line. The Rhee and Sung version of the unsteady k – ϵ – fμ model and the diffusivity tensor heat transfer model were m employed. The Reynolds number was fixed at ReH = 33,000 H and the forcing frequency was varied in the range 0 ≤ fH /Uμ ≤ 2. The condition of constant heat flux was imposed at the bottom wall. The predicted results were compared and validated with the experimental data of Chun andSung and Vogel and Eaton. The enhancement of heat transfer in turbulent separated and reattaching flow by local forcing was evaluated and analyzed.

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Enhancement of heat transfer in turbulent separated and reattaching flow by local forcing

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