LAMINAR-TO-TURBULENT FLOW TRANSITION IN MICROCHANNELS
- 1 January 2004
- journal article
- research article
- Published by Taylor & Francis in Microscale Thermophysical Engineering
- Vol. 8 (1) , 15-30
- https://doi.org/10.1080/10893950490272902
Abstract
Some experimental results on heat transfer and pressure drop through microchannels evidenced that the conventional theory, validated for large-size channels, has to be revised for channels having a hydraulic diameter smaller than 1 mm. Also, the transition from the laminar to the turbulent regime usually takes place at Reynolds numbers lower than those expected. This is considered a confirmation of the disagreement with the classical theory. This paper shows how many experimental results on the laminar-to-turbulent transition in microchannels can be explained by using the “Obot-Jones model,” obtained by means of the conventional theory for large-size channels.Keywords
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