Transient freezing of liquids in forced laminar flow inside a parallel plate channel

نویسنده

  • B. Weigand
چکیده

A simple analytical approximative solution was given for calculating the time dependent development of the ice-layers at the cooled walls inside a parallel plate channel. By ignoring the effect of acceleration, resulting from converging ice-layers in the axial direction, an analytical solution for the variation of the ice-layer thickness with time and axial position could be obtained. The approximative solution was checked by numerical calculations and good agreement was found. Die zeitliche Entwicklung der Erstarrungsfronten in einem ebenen, gekiihlten Kanal mit laminater Durchstriimung Zusammenfassung. Es wurde ein analytisches N/iherungsverfahren entwickett, das es erm6glicht, die zeittiche Entwicktung der Erstarrungsfronten im gekiihlten, ebenen Kanal zu bestimmen. Die Methode liefert unter Vernachl~issigung der Beschleunigungsterme durch die konvergenten Eisschichten eine exakte L6sung der Phasengrenzbeziehung. Das Nfiherungsverfahren wurde mittels numerischer Berechnungen iiberpr/ift und stimmt bis zu Wandunterkiihlungsverh/iltnissen yon B = 10 sehr gut mit der numerischen L6sung fiberein.

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تاریخ انتشار 2005