An experinental study on forced convection from a rectangular heated block by acoustic excitation in a channel flow

J. W. Moon, S. Y. Kim, Hyung Hee Cho

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An experimental study on forced convection from a heated block in a pulsating channel flow has been carried out. This problem is of particular interest in various thermal applications such as electronics cooling and industrial heat exchangers. A pulsating flow is imposed by an acoustic excitation at the channel inlet and a constant heat flux is given along the surfaces of the block. The impact of the important governing parameters such as the Reynolds number, the Strouhal number, and the pulsation amplitude on the heat transfer rate from the heated block is investigated in detail. The vortex shedding frequencies generated from the block are measured and the flow around the block is visualized by means of the particle visualization technique. The experimental results show that the inlet flow pulsation and the Reynolds number substantially affect thermal transport from the heated block. The heat transfer is dramatically enhanced at the frequencies of fF=75Hz and f F=150Hz. It is found by the flow visualization that this phenomenon is related to the intensified fluid mixing at the frequencies. The increase of the pulsation amplitude also significantly amplifies the heat transfer rate from the heated block.

Original languageEnglish
Title of host publicationHeat Transfer
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages81-88
Number of pages8
Volume2
ISBN (Print)0791836339, 9780791836330
Publication statusPublished - 2002 Jan 1

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Forced convection
Channel flow
Acoustics
Heat transfer
Reynolds number
Electronic cooling
Strouhal number
Inlet flow
Vortex shedding
Flow visualization
Heat exchangers
Heat flux
Visualization
Fluids
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

Moon, J. W., Kim, S. Y., & Cho, H. H. (2002). An experinental study on forced convection from a rectangular heated block by acoustic excitation in a channel flow. In Heat Transfer (Vol. 2, pp. 81-88). American Society of Mechanical Engineers (ASME).
Moon, J. W. ; Kim, S. Y. ; Cho, Hyung Hee. / An experinental study on forced convection from a rectangular heated block by acoustic excitation in a channel flow. Heat Transfer. Vol. 2 American Society of Mechanical Engineers (ASME), 2002. pp. 81-88
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Moon, JW, Kim, SY & Cho, HH 2002, An experinental study on forced convection from a rectangular heated block by acoustic excitation in a channel flow. in Heat Transfer. vol. 2, American Society of Mechanical Engineers (ASME), pp. 81-88.

An experinental study on forced convection from a rectangular heated block by acoustic excitation in a channel flow. / Moon, J. W.; Kim, S. Y.; Cho, Hyung Hee.

Heat Transfer. Vol. 2 American Society of Mechanical Engineers (ASME), 2002. p. 81-88.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Moon JW, Kim SY, Cho HH. An experinental study on forced convection from a rectangular heated block by acoustic excitation in a channel flow. In Heat Transfer. Vol. 2. American Society of Mechanical Engineers (ASME). 2002. p. 81-88