EXPERIMENTAL AND NUMERICAL STUDY OF NATURAL CONVECTION HEAT TRANSFER OF A WAVY SURFACE IN A VERTICAL CHANNEL

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ASHJAEI M.; SHOKOUHMAND H.; YOUSEFI T.

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Journal: Year:2007 | Volume:41 | Issue:4 (106) Page(s): 391-399

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Title

EXPERIMENTAL AND NUMERICAL STUDY OF NATURAL CONVECTION HEAT TRANSFER OF A WAVY SURFACE IN A VERTICAL CHANNEL

Author(s)

ASHJAEI M. | SHOKOUHMAND H. | YOUSEFI T. | Issue Writer Certificate

Keywords

NATURAL CONVECTION INTERFEROMETRYQ3

WAVY CHANNELQ3

Abstract

An experimental and numerical study of free convection heat transfer from a channel consisting of a vertical sinusoidal wavy surface and a vertical flat plate has been carried out. The vertical wavy surface was maintained at a constant temperature, while the flat plate is adiabatic. A Mach-Zehnder Interferometer was used to determine the local heat transfer coefficients of sinusoidal wavy surface. FLUENT code was used for numerical simulation. The numerical results are in good agreement with experimental data. The amplitude-wavelength ratio, a, in this investigation is kept constant at a =0.05. The effects of Rayleigh number Ral and wall spacing are investigated as well. Experiments were carried out for eight different Rayleigh numbers and thirteen different wall spacing. Results indicate that the frequency of the local heat transfer rate is the same as that of the J wavy surface. The average heat transfer coefficient increases as the Rayleigh number, Ral increases. For each Rayleigh number there is optimum wall spacing where the heat transfer rate from the wavy sinusoidal surface reaches its maximum value. This optimum wall spacing depends on Rayleigh number and decreases with increasing Rayleigh number.

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APA: Copy

ASHJAEI, M., SHOKOUHMAND, H., & YOUSEFI, T.. (2007). EXPERIMENTAL AND NUMERICAL STUDY OF NATURAL CONVECTION HEAT TRANSFER OF A WAVY SURFACE IN A VERTICAL CHANNEL. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), 41(4 (106)), 391-399. SID. https://sid.ir/paper/14086/en

Vancouver: Copy

ASHJAEI M., SHOKOUHMAND H., YOUSEFI T.. EXPERIMENTAL AND NUMERICAL STUDY OF NATURAL CONVECTION HEAT TRANSFER OF A WAVY SURFACE IN A VERTICAL CHANNEL. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN)[Internet]. 2007;41(4 (106)):391-399. Available from: https://sid.ir/paper/14086/en

IEEE: Copy

M. ASHJAEI, H. SHOKOUHMAND, and T. YOUSEFI, “EXPERIMENTAL AND NUMERICAL STUDY OF NATURAL CONVECTION HEAT TRANSFER OF A WAVY SURFACE IN A VERTICAL CHANNEL,” JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), vol. 41, no. 4 (106), pp. 391–399, 2007, [Online]. Available: https://sid.ir/paper/14086/en

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