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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
F-correction method:
F-factor charts and equations for various heat exchanger configurations,
F-factor method:
F-type shells:
Fabrication:
Failure modes of heat exchangers,
Falling films, direct contact heat transfer in,
Falling film evaporator:
Fanno flow,
Fans in air-cooled heat exchangers:
Fatigue as failure mode of a heat exchanger
Fatigue life, of expansion bellows,
Fawcett, R
Fedor's method, for critical temperature,
Fenghour, A
Critical Constants of Pure Components
Density of Pure Fluids
Vapour Pressure, Enthalpies of Vaporisation and Boiling and Melting Points of Pure Fluids
Viscosity of Pure Fluids
Surface Tension of Pure Liquids
Phase Behaviour of Mixtures
Surface Tension of Liquid Mixtures
Critical Properties of Mixtures
Ferritic stainless steels, as material of construction,
Fick's law for diffusion,
Film boiling:
Film model, condenser design by
Film temperature, definition of for turbulent flow over flat plate,
Films in heat exchangers,
Filmwise condensation:
Fincotherm, heat transfer medium,
Finite-difference equations:
Finite difference methods:
Finite-element methods:
Fins (see also Extended surfaces):
Fire-tube boiler,
Fired heaters,
Fires, room, radiation interaction phenomena in,
Firsova, E V,
Fixed beds:
Fixed tubesheet, shell-and-tube exchangers:
Flanges, mechanical design of in heat exchangers,
Flash evaporation
Flat absorber of thermal radiation,
Flat heads:
Flat plate:
Flat reflector of thermal radiation,
Floating head designs for shell-and-tube heat exchangers:
Flooded type evaporator, in refrigeration,
Flooding phenomena:
Flow distribution:
Flow-induced vibration,
Flow regimes:
Flow stream analysis method for segmentally baffled shell and tube heat exchangers,
Flue gases, fouling by,
Fluid elastic instability as source of flow-induced vibration,
Fluid flow, lost work in,
Fluid mechanics, Eulerian formulation for,
Fluid-to-particle heat transfer in fluidized beds,
Fluidized bed dryer:
Fluidized bed gravity conveyors,
Fluidized beds:
Fluids:
Fluorine:
Fluorobenzene:
Fluoroethane (Refrigerant 161):
Fluoromethane (Refrigerant 41):
Fluted tubes:
Flux method, for modeling radiation in furnaces,
Flux relationships in heat exchangers,
Fogging in condensation
Food processing, fouling of heat exchangers in,
Forced flow reboilers:
Formaldehyde:
Formamide:
Formic acid:
Forster and Zuber correlation for nucleate boiling,
Fouling,
Foam systems, heat transfer in,
Four phase flows, examples,
Fourier law for conduction
Fourier number (Fo):
Frames for plate heat exchangers,
France, guide to national practice for mechanical design,
Free convection:
Free-fall velocity, of particles,
Free-stream turbulence, effect on flow over cylinders,
Freeze protection of air-cooled heat exchangers,
Freezing, of condensate in condensers
Fresnel relations in reflection of radiation,
Fretting corrosion,
Friction factor:
Friction multipliers in gas-liquid flow:
Friction velocity, definition,
Friedel correlation for frictional pressure gradient in straight channels,
Froude number:
Fuels, properties of,
Fuller, R K,
Furan:
Furfural:
Furnaces:
Fusion welding, of tubes into tubesheets in shell-and-tube heat exchangers,
Index
HEDH
A
B
C
D
E
F
F-correction method:
F-factor charts and equations for various heat exchanger configurations,
F-factor method:
F-type shells:
Fabrication:
Failure modes of heat exchangers,
Falling films, direct contact heat transfer in,
Falling film evaporator:
Fanno flow,
Fans in air-cooled heat exchangers:
Fatigue as failure mode of a heat exchanger
Fatigue life, of expansion bellows,
Fawcett, R
Fedor's method, for critical temperature,
Fenghour, A
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Critical Constants of Pure Components
Density of Pure Fluids
Vapour Pressure, Enthalpies of Vaporisation and Boiling and Melting Points of Pure Fluids
Viscosity of Pure Fluids
Surface Tension of Pure Liquids
Phase Behaviour of Mixtures
Surface Tension of Liquid Mixtures
Critical Properties of Mixtures
Ferritic stainless steels, as material of construction,
Fick's law for diffusion,
Film boiling:
Film model, condenser design by
Film temperature, definition of for turbulent flow over flat plate,
Films in heat exchangers,
Filmwise condensation:
Fincotherm, heat transfer medium,
Finite-difference equations:
Finite difference methods:
Finite-element methods:
Fins (see also Extended surfaces):
Fire-tube boiler,
Fired heaters,
Fires, room, radiation interaction phenomena in,
Firsova, E V,
Fixed beds:
Fixed tubesheet, shell-and-tube exchangers:
Flanges, mechanical design of in heat exchangers,
Flash evaporation
Flat absorber of thermal radiation,
Flat heads:
Flat plate:
Flat reflector of thermal radiation,
Floating head designs for shell-and-tube heat exchangers:
Flooded type evaporator, in refrigeration,
Flooding phenomena:
Flow distribution:
Flow-induced vibration,
Flow regimes:
Flow stream analysis method for segmentally baffled shell and tube heat exchangers,
Flue gases, fouling by,
Fluid elastic instability as source of flow-induced vibration,
Fluid flow, lost work in,
Fluid mechanics, Eulerian formulation for,
Fluid-to-particle heat transfer in fluidized beds,
Fluidized bed dryer:
Fluidized bed gravity conveyors,
Fluidized beds:
Fluids:
Fluorine:
Fluorobenzene:
Fluoroethane (Refrigerant 161):
Fluoromethane (Refrigerant 41):
Fluted tubes:
Flux method, for modeling radiation in furnaces,
Flux relationships in heat exchangers,
Fogging in condensation
Food processing, fouling of heat exchangers in,
Forced flow reboilers:
Formaldehyde:
Formamide:
Formic acid:
Forster and Zuber correlation for nucleate boiling,
Fouling,
Foam systems, heat transfer in,
Four phase flows, examples,
Fourier law for conduction
Fourier number (Fo):
Frames for plate heat exchangers,
France, guide to national practice for mechanical design,
Free convection:
Free-fall velocity, of particles,
Free-stream turbulence, effect on flow over cylinders,
Freeze protection of air-cooled heat exchangers,
Freezing, of condensate in condensers
Fresnel relations in reflection of radiation,
Fretting corrosion,
Friction factor:
Friction multipliers in gas-liquid flow:
Friction velocity, definition,
Friedel correlation for frictional pressure gradient in straight channels,
Froude number:
Fuels, properties of,
Fuller, R K,
Furan:
Furfural:
Furnaces:
Fusion welding, of tubes into tubesheets in shell-and-tube heat exchangers,
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Viscosity of Pure Fluids
DOI 10.1615/hedhme.a.000501
5.1.4 Viscosity of pure fluids
A. Fenghour
A. Introduction
When a shearing stress is applied to a confined fluid, a velocity gradient develops within the fluid which then starts to move. The maximum velocity occurs where the stress is applied. Viscosity is a measure of the internal friction of the fluid which opposes dynamic change in the fluid; the higher the friction the higher the viscosity. Viscosity is formally defined as the ratio of the shearing stress per unit area over the velocity gradient. The SI unit of viscosity is N·s/m2 (also Pa·s). In practice, the Non-SI poise (P) and cP (0.01 P) are widely used. 1 P is equivalent to 0.1 N·s/m2.
The ratio of viscosity to density is known as kinematic viscosity. Its SI unit is m2/s. The non-SI unit of stoke is widely used. 1 stoke is equivalent to 0.0001 m2/s.
The viscosity is independent of shear rate in Newtonian fluids which include most gases and low molar mass fluids of engineering importance. Fluids for which the viscosity depends on the shear rate are called non-Newtonian fluids and are outside the scope of this paper.
Viscosity plays a major role in the design of pumping systems, heat and mass transfer applications and the optimal selection of process equipment. A review of the viscosity correlations of practical nature is given by Poling et al. (2001).
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