Freezing in turbulent flow inside tubes and channels

نویسنده

  • B. Weigand
چکیده

A simple and quite flexible numerical model is presented to predict the steady state ice-layer formation inside a cooled two dimensional channel or a tube containing a turbulent flow. The effects of arbitrary entrance velocity distributions upon the shape of the ice-layers are examined. The presented numerical scheme is verified by comparing the predicted ice-layers with measurements and generally good agreement was found. Gefrieren in turbulent durchstr~Jmten Rohren und Kan~ilen Zusammenfassung. Es wurde ein einfaches und sehr flexibles numerisches Modell entwickelt, das es erm6glicht, die stationfiren Erstarrungsfronten im turbulent durchstr6mten ebenen Kanal und im Kreisrohr zu berechnen. Der Artikel befaBt sich unter anderem mit dem Einflug des Eintrittsgeschwindigkeitsprofils auf die Kontur der erstarrten Schicht. Die Gfite des vorgestellten Modells wurde anhand von eigenen Messungen ffir die Str6mung mit Eisbildung im ebenen Kanal fiberpriift. Es zeigte sich eine sehr gute Obereinstimmung zwischen Theorie und Experiment.

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تاریخ انتشار 2005