"Multiphase Flow Dynamics 4: Turbulence, Gas Adsorption and Release,..." by Nikolay Ivanov Kolev

This Volume is devoted to selected Chapters of the multiphase fluid dynamics that are important for practical applications but did not find place in the previous volumes. The state of the art of the turbulence modeling in multiphase flows is presented.

As introduction, some basics of the single phase boundary layer theory including some important scales and flow oscillation characteristics in pipes and rod bundles are presented. Then the scales characterizing the dispersed flow systems are presented. The description of the turbulence is provided at different level of complexity: simple algebraic models for eddy viscosity, simple algebraic models based on the Boussinesq hypothesis, modification of the boundary layer share due to modification of the bulk turbulence, modification of the boundary layer share due to nucleate boiling.
The role of the following forces on the mathematical description of turbulent flows is discussed: the lift force, the lubrication force in the wall boundary layer, and the dispersion force. A pragmatic generalization of the k-eps models for continuous velocity field is proposed containing flows in large volumes and flows in porous structures.
A Methods of how to derive source and sinks terms for multiphase k-eps models is presented.
A set of 13 single- and two phase benchmarks for verification of k-eps models in system computer codes are provided and reproduced with the IVA computer code as an example of the application of the theory. This methodology is intended to help other engineers and scientists to introduce this technology step-by-step in their own engineering practice.
A systematic set of internally consistent state equations for diesel fuel gas and liquid valid in broad range of changing pressure and temperature is provided.

Fundamentals of multiphase dynamics are provided.
Presents the state of the art of the turbulence modeling in multiphase flows.
Basics of the single-phase boundary layer theory including some important scales and flow oscillation characteristics in pipes and rod bundles.
Devoted to selected chapters of the multiphase fluid dynamics that are important for practical applications.

This monograph package contains theory, methods and practical experience for describing complex transient multi-phase processes in arbitrary geometrical configurations, providing a systematic presentation of the theory and practice of numerical multi-phase fluid dynamics.


Table of Contents
Summary
Some single-phase boundary layer theory basics
Introduction to turbulence of multi-phase flows
Sources for fine resolution outside the boundary layer
Source terms for k-eps models in porous structures
Influence of the interfacial forces on the turbulence structure
Particle-eddy interactions
Two group k-eps models
Set of benchmarks for verification of k-eps models in system computer codes
Simple algebraic models for eddy viscosity in bubbly flow
Large eddy simulation
Solubility of O2, N2, H2 and CO2 in water
Transient solution and dissolution ofgasses in liquid flows
Thermodynamic and transport properties of diesel fuel
Index