Microscale Thermophysical Engineering · 2002 · 151 citations · 14 references
EngineeringMechanical EngineeringPhysicsFluid DynamicsHeat TransferThermodynamicsHeat FlowHeat Transfer AnalysisHeat Transfer FundamentalsHeat Transfer In FluidsHeat Transfer ModelingTurbulent TransportLaminar Flow Heat TransferLaminar TransitionLaminar-to-turbulent TransitionLaminar-turbulent TransitionReynolds NumberTransition From Laminar To Turbulent FlowTransitional Flow RegimesTurbulent Flow Heat Transfer
The objective of the present study is to investigate the hydraulic characteristics and single-phase thermal behaviour of a capillary tube with internal diameter of 130 w m. As the Reynolds number varies in the range from 100 up to 8,000 in the experiments, and flow regimes from laminar to turbulent are thoroughly investigated. The laminar-to-turbulent flow transition is studied in depth. Experiments show that laminar-to-turbulent flow transition occurs for Reynolds number in the range 1,880-2,480, while heat transfer correlations in laminar and turbulent regimes, developed for conventional tubes, are not adequate for calculation of heat transfer coefficient in microtubes.
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