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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Heat Transfer in Tubes in the Transitional Flow Regime

Get access (open in a dialog) DOI: 10.1615/IHTC15.kn.000003
pages 41-61

摘要

Not much work has been done in the transitional flow regime in tubes where the flow changes from laminar to turbulent flow. This region has become more important with the introduction of enhanced tubes as they give a good compromise between heat transfer and pressure drop, and therefore, more data is needed for design purposes. The purpose of this keynote paper is to give an overview of the state of the art, to present some of the latest work, to discuss it critically and to identify gaps and opportunities for more work that needs to be done. Challenges with experimental work and methodologies will also be highlighted. The state of the art is discussed in terms of the definition of transition, different heating and cooling boundary conditions, the effect of different types of inlets for macro- and microtubes, the effect of relative tube roughness, different types of geometries with specific reference to enhanced tubes, and the effect of different types of fluids on transition including nanofluids. It is hoped that this paper will be used as a guideline for future research.