Arrays of flow channels with heat transfer embedded in conducting walls

Abstract

a b s t r a c tHere we illustrate the free search for the optimal geometry of flow channel cross-sections that meet two objectives simultaneously: reduced resistances to heat transfer and fluid flow. The element cross section and the wall material are fixed, while the shape of the fluid flow opening, or the wetted perimeter is free to vary. Two element cross sections are considered, square and equilateral triangular. We find that the two objectives are best met when the solid wall thickness is uniform, i.e., when the wetted perimeters are square and triangular, respectively. We also consider arrays of square elements and triangular elements, on the basis of equal mass flow rate per unit of array cross sectional area. The conclusion is that the array of triangular elements meets the two objectives better than the array of square elements.

Current trends in constructal law and evolutionary design

“…The impact of flow configuration on combined heat transfer and fluid mechanics performance was explored in Bejan, Almerbati, Lorente, Sabau, and Klett . The channel cross‐section can be shaped in order to meet the two objectives at the same time.…”

Opening of New Synthetic Routes Using Segmented Microflow in Multistep Syntheses

“…As it is reported in numerous publications, flow chemistry has proven useful as a way of controlling chemical reactions in general and specifically for reactions which are otherwise difficult to control [1][2][3][4][5][6]. Safety concerns, such as heat transfer, are lower in microchannels, because of the small volumes employed [7][8][9][10]. In addition, microreactors and especially segmented flows offer the ability to precisely manipulate the reactant concentrations and the residence time of a chemical reaction travelling through a channel.…”

Constructal studies on hexagonal microchannel heat sinks based on multi-physics field coupling calculations

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