Investigation of Heat Emission during Free Convection in Application to the Closure Relations for Computational Codes

Domestic and foreign data on free convection along vertical heated plates and tubes are analyzed. It is shown that the difference between the heat-emission coefficients during free convection can reach 70%. Heat emission along vertical tubes, especially in turbulent air-flow regimes, has been little...

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Veröffentlicht in:	Atomic energy (New York, N.Y.) N.Y.), 2014-02, Vol.115 (4), p.239-245
Hauptverfasser:	Bezlepkin, V. V., Zatevakhin, M. A., Ignat’ev, A. A., Krektunov, O. P., Krylov, Yu. V., Semashko, S. E., Danin, V. V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Air flow Aluminum Closures Codes Computation Convection Cooling Emission Emission analysis Emissions Experiments Free convection Hadrons Heat conductivity Heat exchange Heat exchangers Heat transfer Heavy Ions Mathematical models Nuclear Chemistry Nuclear Energy Nuclear Physics Physics Physics and Astronomy Plates Studies Tubes Turbulent flow Yachts
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Beschreibung
Zusammenfassung:	Domestic and foreign data on free convection along vertical heated plates and tubes are analyzed. It is shown that the difference between the heat-emission coefficients during free convection can reach 70%. Heat emission along vertical tubes, especially in turbulent air-flow regimes, has been little studied. Meanwhile, a regime close to free convection complicated by heat exchange, for which a correction is made in the closure relations pertaining to heat emission for computational codes, is realized in the passive heatremoval system for the containment. Direct numerical modeling of free convection along vertical plates and tubes is performed.
ISSN:	1063-4258 1573-8205
DOI:	10.1007/s10512-014-9778-3