STABILITY OF CONDENSATION ON HORIZONTAL SURFACES WITH NONCONDENSABLESPRESENT

Citation
Pf. Peterson et Ij. Rao, STABILITY OF CONDENSATION ON HORIZONTAL SURFACES WITH NONCONDENSABLESPRESENT, Journal of heat transfer, 117(4), 1995, pp. 1003-1010
Citations number
13
Categorie Soggetti
Engineering, Mechanical",Thermodynamics
Journal title
ISSN journal
00221481
Volume
117
Issue
4
Year of publication
1995
Pages
1003 - 1010
Database
ISI
SICI code
0022-1481(1995)117:4<1003:SOCOHS>2.0.ZU;2-B
Abstract
This work studies condensation on horizontal surfaces in the presence of noncondensable gases using linear stability analysis to determine w hen one-dimensional flow will bifurcate to a higher-order flow due to an adverse density gradient. The problem is solved for the simple sing le-diffusive case and for the double-diffusive case where the density also depends on either a temperature gradient or a second noncondensab le gas species. For the single-diffusive case critical Rayleigh number s and gas layer thicknesses are obtained for a wide range of Schmidt n umbers. Using these results, the quantity of noncondensable required t o destabilize a horizontal system can be calculated and usually will b e found to be small.