The homogenization of single phase gases or liquids with chemical reactive components by mixing belongs to one of the oldest basic operations applied in chemical engineering. The design of equipment for mixing processes is still derived from measurements of the mixing time which is related to the applied methods of measurement and the special design of the test equipment itself.
This book was stimulated by the Priority Program on "Flow Mixing" financially supported by the Deutsche Forschungsgemeinschaft (DFG). Results are improved modern methods for experimental research and visualization, for simulations and numerical calculations of mixing and chemical reactions in micro and macro scale of time and local coordinates. The results are aimed to improve the prediction of efficiencies and selectivities of chemical reactions in macroscopic scale. The book should give an understanding of the influence of the construction of different mixing equipment on to the momentum, heat and mass transfer as well as reaction processes running on microscopic scales of time and local coordinates.
Newly developed methods of measurement are adjusted to the scales of the selected special transport and conversion processes. They allow a more detailed modeling of the mixing processes by the formulation of an appropriate set of momentum-, heat- and mass balance equations as well as boundary conditions in time and local coordinates together with constitutive equations and reaction kinetics equations as closure laws for numerical and analytical calculations. The improved and more detailed modeling leads to a major progress in predicting mixing processes on the different scales adjusted to transport and reaction processes in molecular, micro- and macro dimensions.
Author(s): Karl Sommer (auth.), Henning Bockhorn, Dieter Mewes, Wolfgang Peukert, Hans-Joachim Warnecke (eds.)
Series: Heat and Mass Transfer
Edition: 1
Publisher: Springer-Verlag Berlin Heidelberg
Year: 2010
Language: English
Pages: 348
Tags: Engineering Fluid Dynamics;Industrial Chemistry/Chemical Engineering;Classical Continuum Physics;Engineering Thermodynamics, Heat and Mass Transfer
Front Matter....Pages -
Front Matter....Pages 1-1
The Variance as Measured Variable for the Evaluation of a Mixing Process or for the Comparison of Mixtures and Mixers....Pages 3-15
Evaluating the Quality of a Mixture: Degree of Homogeneity and Scale of Segregation....Pages 17-35
Front Matter....Pages 37-37
Time-Resolved Measurement of Concentrations in Mixing Processes Using Raman Spectroscopy....Pages 39-53
Measurements of Macro- and Micro-scale Mixing by Two-Colour Laser Induced Fluorescence....Pages 55-67
Analysis of Macro- and Micromixing in Laminar Stirred Mixing Vessels Using Laser Optical and Numerical Methods....Pages 69-86
Experimental Investigation of the Mixing-Process in a Jet-in-Crossflow Arrangement by Simultaneous 2d-LIF and PIV....Pages 87-103
Characterization of Micro Mixing for Precipitation of Nanoparticles in a T-Mixer....Pages 105-124
Mixing in Taylor-Couette Flow....Pages 125-139
Front Matter....Pages 141-141
Direct Numerical Simulation, Analysis and Modelling of Mixing Processes in a Round Jet in Crossflow....Pages 143-164
Analysis of Mixing Processes in Jet Mixers Using LES under Consideration of Heat Transfer and Chemical Reaction....Pages 165-184
Formulation and Validation of an LES Model for Ternary Mixing and Reaction Based on Joint Presumed Discrete Distributions....Pages 185-204
Mixing Analysis and Optimization in Jet Mixer Systems by Means of Large Eddy Simulation....Pages 205-226
Experimental Investigation of a Static Mixer for Validation of Numerical Simulations....Pages 227-243
Simulation of Flow and Transport in a Static Mixer Using Adaptive and Higher Order Numerical Methods....Pages 245-262
Front Matter....Pages 263-263
Computational Analysis of Reactive Mixing in T-Microreactors....Pages 265-286
Experimental Analysis and Modeling of Micromixing in Microreactors....Pages 287-303
A Numerical Approach for Simulation of Turbulent Mixing and Chemical Reaction at High Schmidt Numbers....Pages 305-324
Theoretical and Experimental Investigations of Convective Micromixers and Microreactors for Chemical Reactions....Pages 325-346
Back Matter....Pages -
