Numerical study of heat transfer in square millimetric zigzag channels in the laminar flow regime

Nanofluids in Zigzag Elliptical Tube Heat Exchanger: A Design Perspective

“…3), wherein the Nusselt number of the wavy microchannel is 10% higher than that of the zigzag microchannel, and 40% higher than that of the straight one. Similarly, Shi et al [61] reported an increase in the heat transfer coefficient using a square cross-section of a 2 mm wide zigzag millimetric channel with 90° bends, with a curvature radius of 1.5 mm as opposed to a straight channel. The zigzag channel model can decrease the temperature gradient on the surface of the pipe for a better heat transfer compared to a straight channel [62].…”

Experimental study of heat transfer coefficient in heat exchanger reactors with square millimetric zigzag channels

“…Table 1 shows that the thermohydraulic performance of millimetric zigzag channels are comparable to other compact heat exchanger reactors with roughly the same hydraulic diameter: Corning® Advanced-Flow Reactor TM G1 (the process channel is a succession of millimetric heartshaped cells) and Chart ShimTec® Reactor (three parallel millimetric channels composed of straight lengths and turns). In a previous work [16], flow and heat transfer in 2 mm width zigzag channels with square cross-section were studied numerically on the basis of CFD simulations. The impacts of fluid velocity and channel geometries, in terms of straight section length between two bends, on heat transfer performance were investigated for Reynolds number ranging from 112 to 560.…”

Performance Investigation of Proton‐Exchange Membrane Fuel Cell with Dean Flow Channels

“…It is found that the occurrence of rapid lamination together with the effect of the stretching interface enhance the mixing at low Reynolds number. The thermal−hydraulic performances of zigzag channels with curved sections were investigated by Shi et al [ 33 ] . By increasing the Reynolds number, the Nusselt number in zigzag channels is 6.4 times higher than that in a straight channel, indicating significant improvement of the convective heat transfer.…”