Forced convection in parallel and tapered passages: the importance of the heat flux boundary condition

Walker, V.; Rishehri, S.A.

doi:10.1016/0017-9310(72)90120-2

Cited by 9 publications

(2 citation statements)

References 3 publications

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“…Also, as demonstrated clearly by values obtained for the fin efficiency near the leading edge, the wall temperatures for the flow passage would not have been uniform. The finite element treatment of the cooling fins allows for heat conduction in the axial upstream direction, which is ignored when using a simple fin efficiency; rising wall temperatures in the direction of flow tend to increase heat transfer coefficients [13,14]. These two effects probably explain why the values for Q CFD are marginally higher than those for Q approx and Q num .…”

Section: Discussionmentioning

confidence: 66%

Modelling and simulation techniques for forced convection heat transfer in heat sinks with rectangular fins

Jouhara

Axcell

2009

Simulation Modelling Practice and Theory

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This paper provides a comprehensive description of the thermal conditions within a heat sink with rectangular fins under conditions of cooling by laminar forced convection. The analysis, in which increasing complexity is progressively introduced, uses both classical heat transfer theory and a computational approach to model the increase in air temperature through the channels formed by adjacent fins and the results agree well with published experimental data.The calculations show how key heat transfer parameters vary with axial distance, in particular the rapid changes in heat transfer coefficient and fin efficiency near the leading edges of the cooling fins. Despite these rapid changes and the somewhat ill-defined flow conditions which would exist in practice at the entry to the heat sink, the results clearly show that, compared with the most complex case of a full numerical simulation, accurate predictions of heat sink performance are attainable using analytical methods which incorporate average values of heat transfer coefficient and fin efficiency. The mathematical modelling and solution techniques for each method are described in detail.

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Section: Discussionmentioning

confidence: 66%

Modelling and simulation techniques for forced convection heat transfer in heat sinks with rectangular fins

Jouhara

Axcell

2009

Simulation Modelling Practice and Theory

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“…For example, Walker and Rishehri [23] demonstrated that, in the case of q w = Ae -γZ in a flat channel,…”

Section: Flow and Temperature Field In A Block Of Microchannelsmentioning

confidence: 98%

Numerical Simulation of Convection-Conduction Heat Transfer in a Block of Rectangular Microchannels

2005

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Numerical simulation is performed of the thermal state of a block of rectangular microchannels for different options of heat supply and for a developing distribution of the velocity of liquid in channels and end chambers. Three-dimensional fields of temperature and heat fluxes are obtained both in the frame of the block and in the flow of heat-transfer agent. Calculations are performed for different ratios of the geometric dimensions of the channel and of the frame walls. Simultaneous analysis is made of the calculation results and experimental data on the cooling capacity of the microchannel system.

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Heat transfer—A review of 1972 literature

Eckert

Sparrow

Goldstein

et al. 1973

International Journal of Heat and Mass Transfer

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Forced convection in parallel and tapered passages: the importance of the heat flux boundary condition

Cited by 9 publications

References 3 publications

Modelling and simulation techniques for forced convection heat transfer in heat sinks with rectangular fins

Modelling and simulation techniques for forced convection heat transfer in heat sinks with rectangular fins

Numerical Simulation of Convection-Conduction Heat Transfer in a Block of Rectangular Microchannels

Heat transfer—A review of 1972 literature

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