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Missouri University of Science and Technology
<p>Drag (Aerodynamics)<br />Soap<br />Surface active agents<br />Boundary layer</p>
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Solid-Fluid Drag Reduction, Ian Radin
Solid-Fluid Drag Reduction, Ian Radin
Doctoral Dissertations
"Pressure drop measurements were made on a variety of solid-liquid suspension systems in order to study the effects of particle shape and size, concentration, fluid viscosity and tube diameter on drag reduction. Measurements were made over a wide range of Reynolds numbers in two tubes: 1/4 inch and 1 inch in diameter.
Drag reduction could always be obtained with fibrous additives of length-to-diameter ratio greater than 25-35 if the concentration was sufficiently high. The drag reduction behavior of these suspensions is different from that of high polymer and soap solutions. Laminar flow behavior is stabilized giving lower than normal friction …