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In this study, pipe diameter effect on flow and heat transfer characteristics of ammonia aluminium sulfate dodecahydrate (ammonia alum hydrate: AlNH4(SO4)2·12H2O) slurries with drag reducing surfactants and poly(vinyl alcohol) was investigated. Pressure loss and heat‐transfer coefficients of ammonia alum hydrate solutions and slurries were measured with double‐pipe heat exchangers with different inner...
An experimental study has been performed to investigate the relationship between the extensional viscosity of polymers and the turbulent drag reduction. Self‐standing flowing soap film was used to generate two‐dimensional (2‐D) turbulent flow to eliminate shear stress. Two types of polymers having different flexibilities were added to the 2‐D turbulence. The effects of these polymers were visualized...
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