Møller–Plesset perturbation theory: Difference between revisions

From formulasearchengine
Jump to navigation Jump to search
← Older edit
en>E8xE8
No edit summary
 
(One intermediate revision by one other user not shown)
Line 1: Line 1:
In [[fluid dynamics]], the '''Graetz number''' ('''Gz''') is a [[dimensionless number]] that characterizes [[laminar flow]] in a conduit. The number is defined as:<ref>Nellis, G., and Klein, S. (2009) "Heat Transfer" (Cambridge), page 663.</ref>
Hi, I am Nicholas Bogdan and I completely dig that name. He's always loved living in Delaware. In my expert lifestyle I am a [http://Www.Reddit.com/r/howto/search?q=manufacturing manufacturing] and distribution officer but quickly my spouse and I will start our own company. Horse using is the thing I adore most. See what's new on my web site here: http://sipuserscommunity.blogspot.co.uk/2012/09/10-reasons-to-switch-to-ip-pbx.html<br><br>


:<math>\mathrm{Gz} = {D_H \over L} \mathrm{Re}\, \mathrm{Pr}</math>
Feel free to surf to my [http://Photobucket.com/images/homepage homepage] [http://sipuserscommunity.blogspot.co.uk/2012/09/10-reasons-to-switch-to-ip-pbx.html nya online casinon]
 
where
 
: ''D<sub>H</sub>'' is the diameter in round tubes or [[hydraulic diameter]] in arbitrary cross-section ducts
: ''L'' is the length
: Re is the [[Reynolds number]] and
: Pr is the [[Prandtl number]].
 
This number is useful in determining the thermally developing flow entrance length in ducts. A Graetz number of approximately 1000 or less is the point at which flow would be considered thermally fully developed.<ref>Shah, R. K., and Sekulic, D. P. (2003) "Fundamentals of Heat Exchanger Design" (John Wiley and Sons), page 503.</ref> 
 
When used in connection with mass transfer the Prandtl number is replaced by the [[Schmidt number]], Sc, which expresses the ratio of the momentum diffusivity to the mass diffusivity.
 
:<math>\mathrm{Gz} = {D_H \over L} \mathrm{Re}\, \mathrm{Sc}</math>
 
The quantity is named after the physicist [[Leo Graetz]].
 
== References ==
<references/>
 
{{NonDimFluMech}}
 
{{DEFAULTSORT:Graetz Number}}
[[Category:Dimensionless numbers of fluid mechanics]]
[[Category:Fluid dynamics]]

Latest revision as of 17:22, 5 December 2014

Hi, I am Nicholas Bogdan and I completely dig that name. He's always loved living in Delaware. In my expert lifestyle I am a manufacturing and distribution officer but quickly my spouse and I will start our own company. Horse using is the thing I adore most. See what's new on my web site here: http://sipuserscommunity.blogspot.co.uk/2012/09/10-reasons-to-switch-to-ip-pbx.html

Feel free to surf to my homepage nya online casinon

Retrieved from "https://en.formulasearchengine.com/index.php?title=Møller–Plesset_perturbation_theory&oldid=240394"