Grashof Number
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Grashof number - Wikipedia, the free encyclopedia
The Grashof number Gr is a dimensionless number in fluid dynamics and Heat ... where the L and D subscripts indicates the length scale basis for the Grashof Number. ...
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Grashof number: Definition from Answers.com
Grashof number ( ?gräs?höf ?n?mb?r ) ( fluid mechanics ) A dimensionless number used in the study of free convection of a fluid caused by a hot body,
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Grashof Number -- from Eric Weisstein's World of Physics
Grashof Number. One of the parameters which must be the same in two free ... Rayleigh Number, Reynolds Number © 1996-2007 Eric W. Weisstein ...
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Franz Grashof - Wikipedia, the free encyclopedia
Franz Grashof (July 11, 1826 in ... The Grashof Number was named after him. ... Sander, C.J.,J.P. Holman, "Franz Grashof and the Grashof Number', Int. ...
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Energy Citations Database (ECD) - - Document #5205934
... ration, Prandtl number, and Grashof number.^The gravitational acceleration vector is not ... small Grashof number, or quasi-periodic and axisymmetric ...
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Grashof number - Free Encyclopedia
... Home Page | | Index. Grashof number. From Wacklepedia - The Free Encyclopedia. The Grashof number is a dimensionless number which approximates the ratio ...
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Free and Forced Convection
The Nusselt number is based on the hot film diameter for forced ... appropriate free convection parameter is the Grashof number, ... The Grashof number. From ...
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Transient buoyancy-driven convection of water around 4 °C in a porous ...
The transient buoyancy-driven convection in a water saturated ... Calculated Grashof number for different hot wall temperatures and cold wall temperatures. ...
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Coolingzone.com - Dimensionless Numbers in Heat Transfer
The Grashof number is the ratio of buoyancy forces to the viscous forces. ... The Rayleigh number is the product of Grashof and Prandtl numbers. ...
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The Grashof number is a dimensionless number in fluid dynamics which approximates the ratio of the buoyancy to viscous force acting on a fluid. It is named after the German engineer Franz Grashof.

Gr = \frac{g \beta (T_s - T_\infty ) L^3}{\nu ^2}\,

where

g = standard gravity β = coefficient of thermal expansion Ts = source temperature T∞ = Quiescence temperature L = characteristic length ν = kinematic viscosity

The product of the Grashof number and the Prandtl number gives the Rayleigh number, a dimensionless number that characterizes convection problems in heat transfer.

There is an analogous form of the Grashof number used in cases of natural convection mass transfer problems.

Gr_c = \frac{g \beta^* (C_{a,s} - C_{a,a} ) L^3}{\nu^2}

where

\beta^* = -\frac{1}{\rho} \left ( \frac{\partial \rho}{\partial C_a} \right )_{T,p}

and

g = standard gravity Ca,s = concentration of species a at surface Ca,a = concentration of species a in ambient medium L = characteristic length ν = kinematic viscosity ρ = fluid density Ca = concentration of species a T = constant temperature p = constant pressure

See also References

• Jaluria, Yogesh. Natural Convection Heat and Mass Transfer (New York: Pergamon Press, 1980).

category:Fluid dynamics

Grashof number - Wikipedia, the free encyclopedia
The Grashof number is a dimensionless number in fluid dynamics and Heat Transfer which approximates the ratio of the buoyancy to viscous force acting on a fluid.

Hagen number - Wikipedia, the free encyclopedia
The Hagen number is a dimensionless number used in forced flow calculations. It is the forced flow equivalent of the Grashof number. It is defined as:

espace at MMU: Numerical analysis of Grashof and Darcy number effects ...
Full-text of this article is not available in this e-prints service. This article was originally published in the International journal of fluid mechanics research, published by ...

Grashof number - What does GR stand for? Acronyms and abbreviations by ...
Acronym Definition; GR: Gram(s) GR: Gabriel Richard (high school; Riverview, Michigan) GR: Gair Rhydd (student newspaper, Cardiff, Wales) GR: Galactic Republic (Star Wars)

GR
Acronym Finder: GR stands for Grashof Number ... Citations. MLA style: "GR." Acronym Finder. 2008. AcronymFinder.com 1 Aug. 2008 http://www.acronymfinder.com/Grashof-Number-(GR ...

Grashof Number -- from Eric Weisstein's World of Physics
One of the parameters which must be the same in two free convecting systems for them to be dynamically similar. It is defined by {\rm Gr} = {g\alpha\Delta TL^3\over\nu^2}, where ...

Grashof number: Definition and Much More from Answers.com
Grashof number ( ′gräs′höf ′nəmbər ) ( fluid mechanics ) A dimensionless number used in the study of free convection of a fluid caused by a hot body,

Numerical Analysis of Grashof and Darcy Number Effects on Dissipative ...
For the past 20 years, Fluid Mechanics Research (prior to 1992 Fluid Mechanics-Soviet Research) has offered broad coverage of the entire field of fluid mechanics including flow of ...

Chemistry Dictionary & Glossary
To display the dictionary, type the first letter of the term. To display the ... Grashofova znaèajka: Grashof number

INEX: Wikipedia, the free encyclopedia (Grashof number)
The Grashof number is a dimensionless number in fluid dynamics which approximates the ratio of the buoyancy force to the viscous force acting on a fluid.