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Chemistry - Industrial Chemistry and Chemical Engineering | Micro and Macro Mixing - Analysis, Simulation and Numerical Calculation

Micro and Macro Mixing

Analysis, Simulation and Numerical Calculation

Bockhorn, H., Mewes, D., Peukert, W., Warnecke, H.-J. (Eds.)

2010, XII, 348p.

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  • Contains new modelling approaches for mixing
  • Important field for many industrial and design applications
  • Presents results of an excellent research program

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.

Content Level » Research

Keywords » Large Eddy Simulation - RSI - experiments - modeling - multiphase flow - numerical computation - simulation

Related subjects » Classical Continuum Physics - Industrial Chemistry and Chemical Engineering - Mechanical Engineering - Mechanics

Table of contents 

1: Quality of Mixing.- The Variance as Measured Variable for the Evaluation of a Mixing Process or for the Comparison of Mixtures and Mixers.- Evaluating the Quality of a Mixture: Degree of Homogeneity and Scale of Segregation.- 2: Experimental Methods for Visualization and Measurements in Macro- and Micro-Scale Dimensions of Mixing.- Time-Resolved Measurement of Concentrations in Mixing Processes Using Raman Spectroscopy.- Measurements of Macro- and Micro-scale Mixing by Two-Colour Laser Induced Fluorescence.- Analysis of Macro- and Micromixing in Laminar Stirred Mixing Vessels Using Laser Optical and Numerical Methods.- Experimental Investigation of the Mixing-Process in a Jet-in-Crossflow Arrangement by Simultaneous 2d-LIF and PIV.- Characterization of Micro Mixing for Precipitation of Nanoparticles in a T-Mixer.- Mixing in Taylor-Couette Flow.- 3: Theoretical Methods for Modelling and Numerical Calculations of Mixing Processes.- Direct Numerical Simulation, Analysis and Modelling of Mixing Processes in a Round Jet in Crossflow.- Analysis of Mixing Processes in Jet Mixers Using LES under Consideration of Heat Transfer and Chemical Reaction.- Formulation and Validation of an LES Model for Ternary Mixing and Reaction Based on Joint Presumed Discrete Distributions.- Mixing Analysis and Optimization in Jet Mixer Systems by Means of Large Eddy Simulation.- Experimental Investigation of a Static Mixer for Validation of Numerical Simulations.- Simulation of Flow and Transport in a Static Mixer Using Adaptive and Higher Order Numerical Methods.- 4: Macro- and Micro-Mixing in Micro Channel Flow.- Computational Analysis of Reactive Mixing in T-Microreactors.- Experimental Analysis and Modeling of Micromixing in Microreactors.- A Numerical Approach for Simulation of Turbulent Mixing and Chemical Reaction at High Schmidt Numbers.- Theoretical and Experimental Investigations of Convective Micromixers and Microreactors for Chemical Reactions.

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