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POLYMER DEGRADATION IN TURBULENT DRAG REDUCING FLOWS IN PIPES
The drag reduction by addition of high molecular additives has been investigated by a number of researchers since it was reported by Toms more than 60 years ago. One of the most significant
Beyond the maximum drag reduction asymptote: the pseudo-laminar state
Recent experiments indicated that polymers can reduce the turbulent drag beyond the asymptotic limit known as the MDR, leading to a laminar flow. In this Letter, we show through direct numerical
Transient aspects of the polymer induced drag reduction phenomenon
La dilution en faible concentration de chaines polymeriques longues dans un fluide newtonien peut reduire la trainee turbulente, phenomene nomme ici DR (drag reduction). Les polymeres s’etirent et
Loss of efficiency of polymeric drag reducers induced by high Reynolds number flows in tubes with imposed pressure
This paper studies the loss of efficiency of polymeric drag reducers induced by high Reynolds number flows in tubes. The overall pressure was fixed and the apparatus was built so as to minimize the
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