Abstract
SHS investigation development is considered from the geographical and historical viewpoint. 3 stages are described. Within Stage 1 the work was carried out in the Department of the Institute of Chemical Physics in Chernogolovka where the scientific discovery had been made. At Stage 2 the interest to SHS arose in different cities and towns of the former USSR. Within Stage 3 SHS entered the international scene. Now SHS processes and products are being studied in more than 50 countries.
Abstract
The laminar flow in a duct can be found by the exact solution of the Navier- Stokes equation. An experimental apparatus that changes the flow using a detachable channel side plate can be used to measure the velocity profile or pressure drop in order to find the dominant determiner of the wall’s characteristics. In this section, the mechanism of the apparent fluid slip is discussed by comparing the experimental test results from two ducts having hydrophobic walls with different structural characteristic but almost the same water-repellency characteristics. Different kinds of hydrophobic walls were produced for duct wall, and the laminar drag reduction was examined by measuring the pressure drop.
Keywords:
Drag reduction, laminar flow, duct flow, exact solution, friction factor, velocity profile, highly water-repellent wall, slip velocity, fractal surface, prototype surface, flow visualization, gas-liquid interface.
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Authors:Bentham Science Books