An Analysis of Sediment Transportation in the Light of Fluid Turbulence (Classic Reprint)

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Excerpt from An Analysis of Sediment Transportation in the Light of Fluid TurbulenceHerein 0 represents the concentration of the suspension in per cent by'weight, w' is the terminal velocity of settling of the sediment grains in stagnant water, and <5 is a kinematic turbulence coefficient, corresponding roughly to the kinema.tic viscositye - that is, while 11 is a measure of t11e intensity of molecular refers to a molar mixing process in which finite masses of fluid participate in eddy motion. This process of intermixing between neighboring regions of flow'tends to make the sediment distribution more uniform by carrying material in the direction of decreasing concentration - upwards o, in the normal case-at a rate proportional to the intensity of mixing and to the rate of change of concentra tion at that level. Because of the weight of the sediment, on the other hand, material tends to move downwards at a rate proportional to the concentration at that level and to the velocity of settling. The state of equilibrium described by equation 24 presumes the effects of settling and mixing to be in.balance for all values of y at which the flow'is turbulent.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.