Bubbly Flows: Analysis, Modelling and CalculationMartin Sommerfeld The book summarises the outcom of a priority research programme: "Analysis, Modelling and Computation of Multiphase Flows". The results of 24 individual research projects are presented. The main objective of the research programme was to provide a better understanding of the physical basis for multiphase gas-liquid flows as they are found in numerous chemical and biochemical reactors. The research comprises steady and unsteady multiphase flows in three frequently found reactor configurations, namely bubble columns without interiors, airlift loop reactors, and aerated stirred vessels. For this purpose new and improved measurement techniques were developed. From the resulting knowledge and data, new and refined models for describing the underlying physical processes were developed, which were used for the establishment and improvement of analytic as well as numerical methods for predicting multiphase reactors. Thereby, the development, lay-out and scale-up of such processes should be possible on a more reliable basis. |
Contents
Detailed experimental studies on gasliquid bubble flow in bubble columns with and without recycle | 1 |
Basic experimental investigations on the hydrodynamics of bubble columns | 11 |
Examinination of bubble collisions and coalescence in bubbly flows | 21 |
PIVStudy on bubble interaction and wakes in multiphase flows | 37 |
Dynamics of the Flow in Bubble Column Reactors | 53 |
Improved model for the calculation of homogeneous gasliquid flows | 67 |
Experimental and theoretical investigation of bubble breakup and coalescence in bubbly flows | 85 |
Experimental investigation and modeling of airwater flows in vertical pipes | 101 |
MultiLevel Modelling of Dispersed GasLiquid TwoPhase Flows | 138 |
Analysis of bubble interactions in bidisperse bubble swarms by direct numerical simulation | 174 |
Finite Element Discretization Tools for GasLiquid Flows | 190 |
Flow fields in bubble columns with mass transfer | 216 |
Simultaneous measurement of the local liquid and the local solid velocities | 286 |
A Numerical Model of Dispersed Two Phase Flow in Aerated Stirred Vessels based on Presumed Shape Number Density Functions | 294 |
Bubble dispersion in aerated stirred vessels | 318 |