Efficient autocatalytic reactive mixing and solitary chemical waves in laminar flows

2020 ◽  
Vol 5 (6) ◽  
Author(s):  
Thomas D. Nevins ◽  
Daniel E. Troyetsky ◽  
Douglas H. Kelley
Keyword(s):  
Laminar Flows ◽  
Chemical Waves ◽  
Reactive Mixing

Effect of hydrodynamics on reactive mixing in laminar flows

AIChE Journal ◽  
2003 ◽  
Vol 49 (1) ◽  
pp. 168-179 ◽  
Author(s):  
E. S. Szalai ◽  
J. Kukura ◽  
P. E. Arratia ◽  
F. J. Muzzio
Keyword(s):  
Laminar Flows ◽  
Reactive Mixing

Reactive Mixing Behavior of the Nitration of Glycerin in a Stirred Vessel at Various Perturbation

2014 ◽  
Vol 493 ◽  
pp. 221-226
Author(s):  
Retno Wulandari ◽  
I.N.G. Wardana ◽  
Slamet Wahyudi ◽  
Nurkholis Hamidi
Keyword(s):  
Nitric Acid ◽  
Turbulent Flows ◽  
Mixing Time ◽  
Exothermic Reaction ◽  
Laminar Flows ◽  
Mixing Processes ◽  
Stirred Vessel ◽  
Comparable Performance ◽  
Statistical Sense ◽  
Reactive Mixing

Mixing processes are best understood in turbulent flows, where, ironically they are only understood in a statistical sense. Similarly, detailed analysis of the mechanisms of the realistic mixing process in deterministic laminar flows is nearly absent from literature. This experiment was implemented to investigate the comparable performance of reactive mixing at various perturbation; including continuous, periodic and chaotic. The experiment was designed to reveal the effects of perturbations on glycerin dissolution in nitric acid in stirred vessel. The ratio of glycerin (C3H5(OH)3) to nitric acid (HNO3) is 1 : 3. The geometrical parameter was set to R1/R2= 37.5/7, and an eccentricity of ε = 18.75 mm. The mixing time for dissolving fixed amounts of glycerin in fixed amounts of nitric acid was measured and compared to those from several different perturbations. It was found that mixing time for the exothermic reaction of glycerin nitration had been influenced by perturbations applied to fluid mixing. Comparable experiments have shown that mixing time in the glycerin-nitration reaction could be changed dramatically, along with various perturbations. This experiment results explicitly demonstrate the benefits of mixing performance from chaotic perturbations.

Ignition of a reactive mixing layer

1999 ◽  
Vol 96 (6) ◽  
pp. 1016-1021 ◽  
Author(s):  
C. Nicoli ◽  
P. Haldenwang ◽  
B. Denet
Keyword(s):  
Mixing Layer ◽  
Reactive Mixing

VISUALIZATION OF HEAT TRANSFER IN UNSTEADY LAMINAR FLOWS

2011 ◽  
Vol 3 (1) ◽  
pp. 31-47 ◽  
Author(s):  
Michel F. M. Speetjens ◽  
Anton A. van Steenhoven
Keyword(s):  
Heat Transfer ◽  
Laminar Flows

VISCOSITY EFFECTS ON LIQUID-LIQUID DISPERSION IN LAMINAR FLOWS

2009 ◽  
Author(s):  
Charbel Habchi ◽  
Sofiane Ouarets ◽  
Thierry Lemenand ◽  
Dominique Della-Valle ◽  
Jerome Bellettre ◽  
...  
Keyword(s):  
Laminar Flows ◽  
Liquid Dispersion ◽  
Viscosity Effects

COMPUTATIONAL ANALYSIS OF LAMINAR FLOWS IN A POROUS MEDIUM COMPOSED OF CORN COBS

2019 ◽  
Author(s):  
Hélio Ribeiro Neto ◽  
Pedro Ricardo Corrêa Souza ◽  
Ítalo Augusto Magalhães de Ávila ◽  
Aristeu Silveira Neto
Keyword(s):  
Porous Medium ◽  
Computational Analysis ◽  
Laminar Flows ◽  
Corn Cobs

Modeling of pressure losses on friction in three-layer laminar flows

2003 ◽  
Vol 3 ◽  
pp. 208-219
Author(s):  
A.M. Ilyasov
Keyword(s):  
Pressure Loss ◽  
Gas Flow ◽  
Mutual Influence ◽  
Fluid Model ◽  
Immiscible Liquid ◽  
Laminar Flows ◽  
Pressure Losses ◽  
Flow Parameters ◽  
Interphase Boundaries ◽  
Closing Relations

In this paper we propose a model for determining the pressure loss due to friction in each phase in a three-layer laminar steady flow of immiscible liquid and gas flow in a flat channel. This model generalizes an analogous problem for a two-layer laminar flow, proposed earlier. The relations obtained in the final form for the pressure loss due to friction in liquids can be used as closing relations for the three-fluid model. These equations take into account the influence of interphase boundaries and are an alternative to the approach used in foreign literature. In this approach, the wall and interphase voltages are approximated by the formulas for a single-phase flow and do not take into account the mutual influence of liquids on the loss of pressure on friction in phases. The distribution of flow parameters in these two models is compared.

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