Drag Reduction in Polymer Solutions
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As mentioned in the introduction, the effect manifests in a decrease of pressure loss over a fixed length of a straight pipe compared with a flow of Newtonian fluids through the same pipe section at the same Reynolds numbers for Reynolds numbers which are higher than a certain critical value. This fact is equivalent to a reduction of the friction factor due to the added polymers, see Fig. 1.2 & 1.3. In this gross flow behaviour of the friction factor the main characteristics of drag reducing flows by polymers can already be observed.
KeywordsFlow Field Polymer Solution Wall Shear Stress Friction Factor Newtonian Fluid
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