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optimal-reductions
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Sodium borohydride-solid LiClO4: An effective reagent for reducing aldehydes and ketones in aprotic solvent
, Article Synthetic Communications ; Volume 35, Issue 17 , 2005 , Pages 2271-2276 ; 00397911 (ISSN) ; Saidi, M. R ; Sharif University of Technology
2005
Abstract
An efficient and simple method for the reduction of aldehydes, ketones and acid chlorides has been accomplished by using NaBH4-solid LiClO 4 in mild conditions at ambient temperature with complete chemoselectivity in reduction of α,β-unsaturated aldehydes and ketones. The reaction is fast with high yield and simple workup. Copyright © Taylor & Francis, Inc
Numerical simulation of drag reduction in microgrooved substrates using lattice-boltzmann method
, Article Journal of Fluids Engineering, Transactions of the ASME ; Volume 141, Issue 7 , 2019 ; 00982202 (ISSN) ; Moosavi, A ; Etemadi, A ; Sharif University of Technology
American Society of Mechanical Engineers (ASME)
2019
Abstract
We study drag reduction of a uniform flow over a flat surface due to a series of rectangular microgrooves created on the surface. The results reveal that making grooves on the surface usually leads to the generation of secondary vortices inside the grooves that, in turn, decreases the friction drag force and increases the pressure drag force. By increasing the thickness of the grooves to the thickness of the obstacle, the pressure drag increases due to the enhancement of the generated vortices and the occurrence of separation phenomenon and the friction drag reduces due to a decrease of the velocity gradient on the surface. In addition, by increasing the grooves depth ratio, the pressure...