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Books > Science & Mathematics > Physics > Classical mechanics > Fluid mechanics
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Multiphase Flow Dynamics 4 - Turbulence, Gas Adsorption and Release, Diesel Fuel Properties (Paperback, 2nd ed. 2012)
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Multiphase Flow Dynamics 4 - Turbulence, Gas Adsorption and Release, Diesel Fuel Properties (Paperback, 2nd ed. 2012)
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The present Volume 4 of the successful monograh package "Multiphase
Flow Dynamics"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. In many practical application gases are
solved in liquids under given conditions, released under other
conditions and therefore affecting technical processes for good of
for bad. Useful information on the solubility of oxygen, nitrogen,
hydrogen and carbon dioxide in water under large interval of
pressures and temperatures is collected, and appropriate
mathematical approximation functions are provided. In addition
methods for the computation of the diffusion coefficients are
described. With this information solution and dissolution dynamics
in multiphase fluid flows can be analyzed. For this purpose the
non-equilibrium absorption and release on bubble, droplet and film
surfaces under different conditions is mathematically described. 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. This new second edition includes various
updates, extensions, improvements and corrections. In many
practical application gases are solved in liquids under given
conditions, released under other conditions and therefore affecting
technical processes for good of for bad. Useful information on the
solubility of oxygen, nitrogen, hydrogen and carbon dioxide in
water under large interval of pressures and temperatures is
collected, and appropriate mathematical approximation functions are
provided. In addition methods for the computation of the diffusion
coefficients are described. With this information solution and
dissolution dynamics in multiphase fluid flows can be analyzed. For
this purpose the non-equilibrium absorption and release on bubble,
droplet and film surfaces under different conditions is
mathematically described. 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. This new second
edition includes various updates, extensions, improvements and
corrections.
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