General aspects of heat transfer in fixed and fluidized beds percolated by a gas at Re ≫ 1
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When the fluid density is significant in the fluid mechanics, i. e. with Reynolds numbers Re > 1, the flow pattern changes gradually with increasing Reynolds number. This change in the flow pattern is reflected by changes in the Reynolds number dependence of other variables, e. g. the single-sphere drag coefficient or the pipe friction factor. Clear relations between these integral data and the Reynolds number, however, are obtained only for geometrically similar configurations, e. g. smooth spheres or smooth straight pipes with circular cross-section.
KeywordsHeat Transfer Reynolds Number Void Fraction High Reynolds Number Euler Number
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