(481f) Heat Transfer Enhancement in Turbulent Drag Reducing Surfactant Solutions

Dr. Jacques Zakin long advocated the use of surfactant drag reducing additives in district heating and cooling systems, because of the potential for reducing pumping energy costs in those systems by 50% or more. However, the heat transfer reduction effect that accompanies drag reduction can preclude use of these additives in applications with heat transfer operations. As a result, Prof. Zakin spent the latter part of his career investigating methods to enhance heat transfer in drag reducing solutions. This talk describes the most recent work completed by his research group: designing agitated heat exchangers and novel static mixers with improved heat transfer enhancement and reduced energy cost, and developing “smart” wormlike micelle systems that can be switched on and off by small changes in temperature, shear rate, or composition.