表面活性剂湍流减阻

所属分类:力学  
出版时间:2012-6   出版时间:高等教育出版社   作者:杨凤臣   页数:257   字数:430000  

内容概要

  表面活性剂湍流减阻是流体动力学领域多年来的研究热点,这一现象同时与湍流、流变学、流体动力学等多个方面密切相关,而且对其进行应用推广需要化工、机械、市政等不同领域知识的有机结合。《表面活性剂湍流减阻(英文版)》正是在这一背景下,基于表面活性剂湍流减阻流动研究领域最新的实验、数值模拟和理论分析方面的研究成果,详细阐述有关表面活性剂湍流减阻流动的湍流特性、流变学物性、理论、特殊技术以及实际应用方面的问题。
  《表面活性剂湍流减阻(英文版)》可供流体力学、工程热物理、化学工程、空调、制冷等相关专业研究生以及相关研究领域的科研人员参考使用。

书籍目录

Preface
1 Introduction
1.1 Background
1.2 Surfactant Solution
1.2.1 Anionic Surfactant
1.2.2 Cationic Surfactant
1.2.3 Nonionic Surfactant
1.2.4 Amphoteric Surfactant
1.2.5 Zwitterionic Surfactant
1.3 Mechanism and Theory of Drag Reduction by Surfactant
Additives
1.3.1 Explanations of the Turbulent DR Mechanism from the Viewpoint
of Microstructures
1.3.2 Explanations of the Turbulent DR Mechanism from the Viewpoint
of the Physics of Turbulence
1.4 Application Techniques of Drag Reduction by Surfactant
Additives
1.4.1 Heat Transfer Reduction of Surfactant Drag-reducing
Flow
1.4.2 Diameter Effect of Surfactant Drag-reducing Flow
1.4.3 Toxic Effect of Cationic Surfactant Solution
1.4.4 Chemical Stability of Surfactant Solution
1.4.5 Corrosion of Surfactant Solution
References
2 Drag Reduction and Heat Transfer Reduction Characteristics of
Drag-Reducing Surfactant Solution Flow
2.1 Fundamental Concepts of Turbulent Drag Reduction
2.2 Characteristics of Drag Reduction by Surfactant Additives and
Its Influencing Factors
2.2.1 Characteristics of Drag Reduction by Surfactant
Additives
2.2.2 Influencing Factors of Drag Reduction by Surfactant
Additives
2.3 The Diameter Effect of Surfactant Drag-reducing Flow and
Scale-up Methods
2.3.1 The Diameter Effect and Its Influence
2.3.2 Scale-up Methods
2.3.3 Evaluation of Different Scale-up Methods
2.4 Heat Transfer Characteristics of Drag-reducing Surfactant
Solution Flow and Its Enhancement Methods
2.4.1 Convective Heat Transfer Characteristics of Drag-reducing
Surfactant Solution Flow
2.4.2 Heat Transfer Enhancement Methods for Drag-reducing
Surfactant Solution Flows
References
3 Turbulence Structures in Drag-Reducing Surfactant Solution
Flow
3.1 Measurement Techniques for Turbulence Structures in
Drag-Reducing Flow
3.1.1 Laser Doppler Velocimetry
3.1.2 PIV
3.2 Statistical Characteristics of Velocity and Temperature Fields
in Drag-reducing Flow
3.2.1 Distribution of Averaged Quantities
3.2.2 Distribution of Fluctuation Intensities
3.2.3 Correlation Analyses of Fluctuating Quantities
3.2.4 Spectrum Analyses of Fluctuating Quantities
3.3 Characteristics of Turbulent Vortex Structures in Drag-reducing
Flow
3.3.1 Identification Method of Turbulent Vortex by Swirling
Strength
3.3.2 Distribution Characteristics of Turbulent Vortex in the x-y
Plane
3.3.3 Distribution Characteristics of Turbulent Vortex in the y-z
Plane
3.3.4 Distribution Characteristics of Turbulent Vortex in the x-z
Plane
3.4 Reynolds Shear Stress and Wall-Normal Turbulent Heat Flux
References
4 Numerical Simulation of Surfactant Drag Reduction
4.1 Direct Numerical Simulation of Drag-reducing Flow
4.1.1 A Mathematical Model of Drag-reducing Flow
4.1.2 The DNS Method of Drag-reducing Flow
4.2 RANS of Drag-reducing Flow
4.3 Governing Equation and DNS Method of Drag-reducing Flow
4.3.1 Governing Equation
4.3.2 Numerical Method
4.4 DNS Results and Discussion for Drag-reducing Flow and Heat
Transfer
4.4.1 The Overall Study on Surfactant Drag Reduction and Heat
Transfer by DNS
4.4.2 The Rheological Parameter Effect of DNS on Surfactant Drag
Reduction
4.4.3 DNS with the Bilayer Model of Flows with Newtonian and
Non-Newtonian Fluid Coexistence
4.5 Conclusion and Future Work
References
5 Microstructures and Rheological Properties of Surfactant
Solution
6 Application Techniques for Drag Reduction by Surfactant
Additives
Index

章节摘录

版权页:
插图:
1.3.2.4
Decoupling
of
Turbulent
Fluctuations
It
has
been
indicated
from
many
studies
that
the
effect
of
drag
reducer
on
turbulent
flows
also
appears
as
the
decreased
correlation
between
the
axial
and
radial
fluctua-tions.
This
effect
is
named
"decoupling."
The
decoupling
of
turbulent
fluctuations
can
decrease
the
Reynolds
stress.
According
to
the
quantitative
relationship
between
Reynolds
shear
stress
and
the
turbulent
contribution
to
frictional
drag
coefficient
deduced
by
Fukagata
et
al.
(i.e.,
the
FIK
equation)
(38),
a
decrease
of
Reynolds
shear
stress
directly
results
in
a
decrease
of
the
friction
factor
of
turbulent
flow,
and
so
turbulent
DR.
Actually,
a
decrease
of
Reynolds
stress
is
caused
by
twofold
effects,
that
is,
the
decoupling
of
turbulent
fluctuations
and
turbulence
suppression
(17,33,39-41
).This
postulation
is
also
correct
qualitatively.
1.3.2.5
Viscoelasticity
All
polymer
and
surfactant
solutions
with
turbulent
drag-reducing
effects
display
viscoelastic
rheological
properties.
With
the
development
of
viscoelastic
fluid
mechanics,
some
researchers
proposed
that
the
drag-reducing
effect
of
polymer
and
surfactant
solutions
is
the
result
of
the
interaction
between
viscoelasticity
and
turbulent
vortices.
The
microstructures
(polymer
molecule
chains
or
network
structures
in
surfactant
solution)
in
the
drag
reducer
solution
at
a
high-shear-rate
region
can
absorb
the
turbulent
kinetic
energy
of
small
vortices
within
the
energy-containing
range
and
store
it.
When
the
microstructures
are
diffused
or
convected
to
a
low-shear-rate
region,they
will
be
relaxed
to
a
random
threadlike
entanglement
and
the
stored
energy
will
be
released
to
the
low-wave-number
vortices
(large-scaled
vortices)
in
the
form
of
elastic
stress
waves,
which
greatly
decreases
the
dissipation
of
turbulent
kinetic
energy
and
induces
turbulent
DR.
The
viscoelastic
theory
for
the
mechanism
of
turbulent
DR
by
additives
was
proposed
by
DeGennes
(42).
The
viscoelasticity
postulation
not
only
explains
the
turbulent
DR
phenomenon
in
many
polymer
and
surfactant
solution
flows
with
viscoelasticity,
but
also
estimates
the
DR
rate
quantitatively.
It
is
also
a
powerful
tool
for
studying
the
mechanism
of
turbulent
DR
from
the
viewpoint
of
the
physics
of
turbulence
and
developing
new
quantitative
analysis
theories
for
turbulent
drag-reducing
flows.
However,
this
postulation
was
challenged
by
the
"anisotropic
stresses"hypothesis
proposed
by
Toonder
(43).

编辑推荐

《"十二五"国家重点图书:表面活性剂湍流减阻(英文版)》可供流体力学、工程热物理、化学工程、空调、制冷等相关专业研究生以及相关研究领域的科研人员参考使用。

图书封面


    表面活性剂湍流减阻下载



用户评论 (总计1条)

 
 

  •     帮导师买的,还不错~
 

自然科学类PDF下载,力学PDF下载。 PPT下载网 

PPT下载网 @ 2017