Thermal Spreading and Contact Resistance (eBook)

Fundamentals and Applications

Yuri S. Muzychka, M. Michael Yovanovich (Autoren)

eBook Download: EPUB

2023
946 Seiten
John Wiley & Sons (Verlag)
978-1-394-18754-6 (ISBN)

Infos

Thermal Spreading and Contact Resistance: Fundamentals and Applications

Single source reference on how applying thermal spreading and contact resistance can solve problems across a variety of engineering fields

Thermal Spreading and Contact Resistance: Fundamentals and Applications offers comprehensive coverage of the key information that engineers need to know to understand thermal spreading and contact resistance, including numerous predictive models for determining thermal spreading resistance and contact conductance of mechanical joints and interfaces, plus detailed examples throughout the book.

Written by two of the leading experts in the field, Thermal Spreading and Contact Resistance: Fundamentals and Applications includes information on:

• Contact conductance, mass transfer, transport from super-hydrophobic surfaces, droplet/surface phase change problems, and tribology applications such as sliding surfaces and roller bearings
• Heat transfer in micro-devices and thermal spreaders, orthotropic systems, and multi-source applications for electronics thermal management applications
• Fundamental principles, thermal spreading in isotropic half-space regions, circular flux tubes and disc spreaders, and rectangular flux channels and compound spreaders
• Systems with non-uniform sink plane conductance, transient spreading resistance, and contact resistance between both non-conforming and conforming rough surfaces

Providing comprehensive coverage of the subject, Thermal Spreading and Contact Resistance: Fundamentals and Applications is an essential resource for mechanical, aerospace, and chemical engineers working on research in the fields of heat transfer, thermal management of electronics, and tribology, as well as thermal engineers and researchers in the field of thermal physics.

Yuri S. Muzychka is a Professor of Mechanical Engineering at Memorial University of Newfoundland, Canada. He is a Fellow of ASME, CSME, and the Engineering Institute of Canada (EIC) and has published over 250 journal and conference proceedings papers, in addition to three handbook chapters.

M. Michael Yovanovich is a Distinguished Professor Emeritus at the University of Waterloo, Canada. He is a fellow of ASME, CSME, AIAA, AAAS, and RSC. He has published seven handbook chapters and over 350 journal and conference proceedings papers, and has given over 150 keynote lectures.

Textauszug

Nomenclature

linear dimensions (m)

radial dimensions (m)

semi‐axes of an ellipse or rectangle (m)

contact spot radius (m)

elastic contact spot radius (m)

elastic–plastic contact spot radius (m)

Hertz contact spot radius (m)

plastic contact spot radius (m)

contact spot radius for layer (m)

contact spot radius for substrate (m)

area ()

apparent contact area ()

contact area ()

gap area ()

real contact area ()

flux tube cross‐sectional area ()

Fourier coefficients

hydrodynamic slip length

thermal slip length

effective CLA roughness ()

modified Fourier coefficients

Biot number ()

specific heat ()

Fourier coefficients

equation coefficients

concentration ()

dimensionless contact conductance ()

Center Line Average roughness (m)

plate separation (m)

diameter of contacting sphere (m)

mass diffusivity of in ()

influence coefficient (K/W)

exponential function ()

eccentricity (m)

Gaussian error function

complementary error function

inverse complementary error function

complete elliptic integral of the second kind

modulus of elasticity (GPa)

effective modulus of elasticity (GPa)

exponential integral

elastic–plastic contact parameter

applied load (force) (N)

incomplete elliptic integral of the first kind

effective radiative surface factor

Fourier number ()

superposition functions

convection film coefficient or conductance ()

sink plane conductance ()

contact conductance ()

edge conductance ()

gap conductance ()

joint conductance ()

maximum conductance ()

equivalent elastic micro‐hardness (GPa)

elasto‐plastic micro‐hardness (GPa)

Brinell hardness (GPa)

layer hardness (GPa)

micro‐hardness of softer substrate (GPa)

Vickers micro‐hardness (GPa)

equivalent plastic micro‐hardness (GPa)

effective micro‐hardness of coated surface (GPa)

integrated complementary error function

polar second moment of area

modified Bessel functions of the first kind of order 0 and 1

gap conductance integral

gap conductance integral for line contact

gap conductance integral for point contact

mass flux in ‐direction ()

Bessel functions of the first kind of order 0 and 1

thermal conductivity ratio

modified Bessel functions of the second kind of order 0 and 1

thermal conductivities ()

gas thermal conductivity ()

polymer thermal conductivity ()

effective contact spot thermal conductivity ()

reaction rate ()

complete elliptic integral of the first kind

Kirchoff transform

Knudsen number ()

arbitrary depth (m)

arbitrary length scale (m)

length (m)

latent heat of fusion (J/kg)

indices for summations

Hertz parameters

surface slope

rarefaction parameter (m)

dimensionless rarefaction parameter ()

normal direction (m)

hyper‐ellipse shape parameter

contact spot density ()

number of contact spots

number of heat sources

number of sides of a polygon

contact pressure (MPa)

gap gas pressure (Pa)

Peclet number ()

sink plane conductance distribution parameter

thermal conductivity coefficients

constant uniform heat flux ()

heat flux ()

dimensionless heat flux ()

heat flow rate (W)

heat flow rate per unit depth (W/m)

cylindrical or spherical radial coordinate (m)

inscribed radius of a polygon

thermal resistance (K/W)

gap thermal resistance (K/W)

radiation thermal resistance (K/W)

contact thermal resistance (K/W)

joint thermal resistance (K/W)

thermal spreading resistance (K/W)

total thermal resistance (K/W)

bulk resistance thermal resistance (K/W)

dimensionless thermal spreading resistance

specific thermal resistance ( [])

shape factor (m)

material flow stress (GPa)

Stefan number ()

time (s)

integration variable

total and layer thicknesses (m)

temperature (K)

bulk material temperature (K)

contact temperature (K)

joint temperature (K)

source temperature (K)

contact plane surface temperature (K)

sink temperature (K)

velocity (m/s)

elastic displacement (m)

velocity (m/s)

Kirchoff transform variable

velocity of heat sliding heat source (m/s)

Cartesian coordinate (m)

heat source centroid (m)

mean plane separation (m)

Cartesian coordinate (m)

Bessel function of the second kind of order zero

Cartesian coordinate (m)

thermal spreading zone for circle ()

thermal spreading zone for ellipse ()

Greek Symbols

thermal diffusivity ()

dimensionless conductivity ratio

accommodation coefficient

semi‐axes of an ellipse (m)

equation coefficients

eigenvalues

eigenvalues ()

angular measurement

Beta function

orthotropic conductivity variable ()

specific heat ratio

Gamma function

eigenvalues

perpendicular (m)

local gap thickness (m)

penetration depth (m)

aspect ratio ()

relative contact area ()

surface emissivity

dimensionless contact strain

dummy variable

dimensionless length ()

temperature excess ( [K])

mean temperature excess (K)

centroidal temperature excess (K)

constant uniform temperature excess (K)

source temperature excess (K)

complementary modulus ()

relative conductivity ()

integration variable

eigenvalues

relative mean plane separation ()

mean free path (m)

heat flux shape parameter

coefficient of dynamic friction

dynamic viscosity (Pa s)

Poisson's ratio

dimensionless length ()

denotes arbitrary eigenvalue in spreading function

orthotropic coordinate transformation variable

hydrodynamic spreading factor

density ()

segment length

relative position in polar coordinates ()

radius of curvature (m)

radii of curvature of contacting bodies (m)

RMS surface roughness (m)

Stefan–Boltzmann constant ()

wall shear stress (Pa)

dimensionless wall shear ()

relative thickness ()

area contact ratio ()

thermal spreading function

reciprocal of thermal spreading function

thermal constriction (spreading) parameter

angular measurement

thermal elastoconstriction parameter

angular measurement

thermal conductivity coefficients

omega function in point source method

Subscripts

0

denotes at centroid or reference value

denotes layer number

length scale used to define dimensionless resistance

...

Produkt-Details

• Erscheint lt. Verlag: 9.8.2023
• Reihe/Serie: Wiley-ASME Press Series
• Reihe/Serie: Wiley-ASME Press Series
• Sprache: englisch
• Themenwelt: Technik ► Maschinenbau
• Schlagworte: circular flux tubes • Contact conductance • disc spreaders • droplet phase change • joint conductance • Maschinenbau • mass transfer • mechanical engineering • Mechanical Engineering Special Topics • orthtropic materials • rectangular flux channels • Spezialthemen Maschinenbau • super-hydrophobic surfaces • thermal spreading in isotropic half-space regions • thermal spreading resistance • thermodynamics • Thermodynamik • Tribology
• ISBN-10: 1-394-18754-8 / 1394187548
• ISBN-13: 978-1-394-18754-6 / 9781394187546