Abstract
AbstractCritical Reynolds numbers were revealed by the study at which the velocity ratio curves typically achieved minimum or maximum values. The pronounced critical condition at Reynolds number about 1,000 is of particular interest, falling as it does in the middle of the Reynolds number range widely regarded as yielding laminar flow in a long circular pipe, but coinciding with the first manifestations of turbulence reported in previous studies.Velocity ratios for both spherical and cylindrical capsules were found to vary from about 1.10 to 1.75 in the laminar flow regime, and from 1.10 to 1.30 at the highest Reynolds numbers.
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