Book contents
- Frontmatter
- Contents
- Preface
- Nomenclature
- 1 Introduction
- 2 Theory of Isolated Droplet Vaporization, Heating, and Acceleration
- 3 Multicomponent Liquid Droplets
- 4 Droplet Arrays and Groups
- 5 Spray Equations
- 6 Computational Issues
- 7 Spray Applications
- 8 Droplet Interactions with Turbulence and Vortical Structures
- 9 Droplet Behavior at Near-Critical, Transcritical, and Supercritical Conditions
- Appendix A The Field Equations
- Appendix B Droplet-Model Summary
- Appendix C Guiding Principles for Two-Continua Formulation
- References
- Subject Index
2 - Theory of Isolated Droplet Vaporization, Heating, and Acceleration
Published online by Cambridge University Press: 13 October 2009
- Frontmatter
- Contents
- Preface
- Nomenclature
- 1 Introduction
- 2 Theory of Isolated Droplet Vaporization, Heating, and Acceleration
- 3 Multicomponent Liquid Droplets
- 4 Droplet Arrays and Groups
- 5 Spray Equations
- 6 Computational Issues
- 7 Spray Applications
- 8 Droplet Interactions with Turbulence and Vortical Structures
- 9 Droplet Behavior at Near-Critical, Transcritical, and Supercritical Conditions
- Appendix A The Field Equations
- Appendix B Droplet-Model Summary
- Appendix C Guiding Principles for Two-Continua Formulation
- References
- Subject Index
Summary
GENERAL COMMENTS
There is interest in the droplet-vaporization problem from two different aspects. First, we wish to understand the fluid-dynamic and -transport phenomena associated with the transient heating and vaporization of a droplet. Second, but just as important, we must develop models for droplet heating, vaporization, and acceleration that are sufficiently accurate and simple to use in a spray analysis involving so many droplets that each droplet's behavior cannot be distinguished; rather an average behavior of droplets in a vicinity are described. We can meet the first goal by examining both approximate analyses and finite-difference analyses of the governing Navier–Stokes equations. The second goal can be addressed at this time with only approximate analyses since the Navier–Stokes resolution for the detailed flow field around each droplet is too costly in a practical spray problem. However, correlations from Navier–Stokes solutions provide useful inputs into approximate analyses. The models discussed herein apply to droplet vaporization, heating, and acceleration and to droplet condensation, cooling, and deceleration for a droplet isolated from other droplets.
Introductory descriptions of vaporizing droplet behavior can be found in the works of Chigier (1981), Clift et al. (1978), Glassman (1987), Kanury (1975), Kuo (1986), Lefebvre (1989), and Williams (1985). Useful research reviews are given by Faeth (1983), Law (1982), and Sirignano (1983, 1993a, 1993b). The monograph by Sadhal et al. (1997) is also noteworthy.
The vaporizing-droplet problem is a challenging, multidisciplinary issue. It can involve heat and mass transport, fluid dynamics, and chemical kinetics.
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- Fluid Dynamics and Transport of Droplets and Sprays , pp. 7 - 76Publisher: Cambridge University PressPrint publication year: 1999
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