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	Anomaly of spontaneous transition to instability of liquid-vapour front in a porous medium
	Khan, Zafar Hayat ; Pritchard, David
	2015
关键词	Geothermal system Liquid-vapour front Spontaneous transition Rayleigh-Taylor instability GEOTHERMAL SYSTEMS INTERFACE STABILITY STEAM WATER STATE
英文摘要	In this article, we have investigated the instability of the liquid-vapour front in a geothermal system with isothermal boundaries. A two-dimensional linear stability analysis of the isothermal basic state shows that the Rayleigh-Taylor mechanism is the dominant contributor to instability. A conditional expression for the critical modified Rayleigh number for different heat transport processes has been found. It has been shown that the spontaneous transition to instability is an artefact of neglecting thermal advection and the imposition of the phase change front to be equidistant from the liquid and vapour boundaries. (C) 2015 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000351799000044&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Thermodynamics; Engineering, Mechanical; Mechanics; SCI(E); EI; 0; ARTICLE; zafarhayyatkhan@gmail.com; 448-455; 84
语种	英语
出处	SCI ; EI
出版者	国际传热与传质杂志
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/157274]
专题	数学科学学院
推荐引用方式 GB/T 7714	Khan, Zafar Hayat,Pritchard, David. Anomaly of spontaneous transition to instability of liquid-vapour front in a porous medium. 2015-01-01.

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