Formula for Natural Convection in Calm Air
Formula for Natural Convection in Calm Air
(OP)
From Chopey (2nd and 3rd edition) I have this formula (reproduced on this web page in part two of the calculation procedure).
I'm trying to find an equivalent formula in a reference text (started with McCabe Smith & Harriott) but I can't find any support. My problem is knowing where the coefficient 0.27 came from. Is it dependent on the carbon steel pipe? Or some other property? I need to know if this formula can be applied to any situation, regardless of the piping material or whatever "air" is (maybe a pipe in a nitrogen environment or something, who knows?)
Thanks! I'm looking in Perry's now... Hopefully someone can direct me to the source of that linked equation?
Q/A = (0.27 dT^1.25)/D^0.25
Thanks!
I'm trying to find an equivalent formula in a reference text (started with McCabe Smith & Harriott) but I can't find any support. My problem is knowing where the coefficient 0.27 came from. Is it dependent on the carbon steel pipe? Or some other property? I need to know if this formula can be applied to any situation, regardless of the piping material or whatever "air" is (maybe a pipe in a nitrogen environment or something, who knows?)
Thanks! I'm looking in Perry's now... Hopefully someone can direct me to the source of that linked equation?
Q/A = (0.27 dT^1.25)/D^0.25
Thanks!





RE: Formula for Natural Convection in Calm Air
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: Formula for Natural Convection in Calm Air
RE: Formula for Natural Convection in Calm Air