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

J. W. Moon, S. Y. Kim, H. H. Cho

Research output: Contribution to journalConference article

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
Pages (from-to)81-88
Number of pages8
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume372
Issue number2
Publication statusPublished - 2002 Dec 1
Event2002 ASME International Mechanical Engineering Congress and Exposition - New Orleans, LA, United States
Duration: 2002 Nov 172002 Nov 22

Fingerprint

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
  • Fluid Flow and Transfer Processes

Cite this

@article{f43b0fbe4ded4a158cd36fdeb03ed3ab,
title = "An experinental study on forced convection from a rectangular heated block by acoustic excitation in a channel flow",
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.",
author = "Moon, {J. W.} and Kim, {S. Y.} and Cho, {H. H.}",
year = "2002",
month = "12",
day = "1",
language = "English",
volume = "372",
pages = "81--88",
journal = "American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD",
issn = "0272-5673",
publisher = "American Society of Mechanical Engineers(ASME)",
number = "2",

}

TY - JOUR

T1 - An experinental study on forced convection from a rectangular heated block by acoustic excitation in a channel flow

AU - Moon, J. W.

AU - Kim, S. Y.

AU - Cho, H. H.

PY - 2002/12/1

Y1 - 2002/12/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0346955925&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346955925&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0346955925

VL - 372

SP - 81

EP - 88

JO - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD

JF - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD

SN - 0272-5673

IS - 2

ER -