Navigation by alphabet
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
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:
in boiling outside single horizontal tubes,
in boiling in horizontal tubes,
in combined free and forced convection in pipes
in combined free and forced convection around immersed bodies,
in condensation-forming immiscible liquids,
in fluidized beds
in gas-liquid flow,
in helical coils of rectangular cross section,
influence of free convection on, in horizontal pipe flow,
in liquid-liquid flow
in liquid-liquid-gas flow,
in natural convection in enclosures,
in single-phase flow in tube banks,
in single-phase flow over immersed bodies:
in single phase flow in annular channel with rotating inner surface,
in solid-gas flow,
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
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:
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
in boiling outside single horizontal tubes,
in boiling in horizontal tubes,
in combined free and forced convection in pipes
in combined free and forced convection around immersed bodies,
in condensation-forming immiscible liquids,
in fluidized beds
in gas-liquid flow,
in helical coils of rectangular cross section,
influence of free convection on, in horizontal pipe flow,
in liquid-liquid flow
in liquid-liquid-gas flow,
in natural convection in enclosures,
in single-phase flow in tube banks,
in single-phase flow over immersed bodies:
in single phase flow in annular channel with rotating inner surface,
in solid-gas flow,
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,
Download the citation in the EndNote formatOpen in a new tab.
Download the citation in the RefWorks formatOpen in a new tab.
Download the citation in the BibTex formatOpen in a new tab.
Combined Free and Forced Convection Around Immersed Bodies
DOI 10.1615/hedhme.a.000176
2.5.9 Combined free and forced convection around immersed bodies
S. W. Churchill
Heat transfer by forced convection between a fluid and an immersed body implies a temperature difference and hence a density difference. The density difference gives rise to free convection. The effect of buoyant motion in the direction of the forced flow is to increase the velocity in the boundary layer and thereby the rate of heat transfer over that for pure forced convection. Buoyant motion in opposition to the forced motion reduces the velocity and the rate of heat transfer relative to pure forced or free convection. Also, assisting flows retard and opposing flows advance the point of separation of the boundary layer on immersed bodies. Hall and Price (1970) found that the rate of heat transfer in a turbulent free convection was at first decreased and then increased by a superimposed forced flow in the same direction. They attributed the decrease to the suppression of turbulence. In view of these complexities, it is apparent that the suggestion of McAdams (1954), that the higher of the rates of heat transfer for the two pure processes be used for the combined process, can be considered only as a first-order approximation. More accurate correlating equations for various regimes are recommended below.
A. Assisting convection
(a) Thin laminar boundary-layer regime
Extensive theoretical and experimental results have been obtained for aiding free and forced convection in the laminar boundary-layer regime, and many expressions have been proposed for their correlation, generally in the form
\[\label{eq1} \mbox{Nu}^{n}=\mbox{Nu}^{n}_{F}+\mbox{Nu}^{n}_{N}\tag{1}\]
... You need a subscriptionOpen in a new tab. to view the full text of the article. If you already have the subscription, please login here
© 2024 by Begell House, Inc.