https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1010&context=coolingpubs

Investigation of heat transfer in rectangular microchannels

Flow characteristics of water in microtubes

Convective heat transfer and flow friction for water flow in microchannel structures

Single-phase Convective Heat Transfer in Microchannels: a Review of Experimental Results

https://seniordesign.engr.uidaho.edu/2006_2007/am2/characterization_of_frictional_pressure_drop_for_liquid_flows_through_microchannels.pdf

Characterization of frictional pressure drop for liquid flows through microchannels

Experiments were conducted to investigate the flow characteristics of water flowing through rectangular microchannels having hydraulic diameters of 0.133-0.367 mm and H/W ratios of 0.333-1. Experimental results indicated that the laminar flow transition occurred at Reynolds numbers of 200-700. This critical Re for the laminar transition was strongly affected by the hydraulic diameter, decreasing with corresponding decreases in the microchannel. In addition, the size of the transition range was diminished and fully developed turbulent flow also occurred at much lower Re. The friction behavior of both the laminar and turbulent flow was found to depart from the classical thermqfluid correlations. lite friction factor, f, was found to be proportional to Re−1.98 rather than Re for the laminar condition, and proportional to Re−1.72i for turbulent flow. The geometric parameters, hydraulic diameter, and H/W were found to be the most important parameters and had a critical effect on the flow. Generally, increasing...

X. F. Peng

Papers

Frictional flow characteristics of water flowing through rectangular microchannels