Penetrative convection in a partially open enclosure

Abdulkarim H. Abib, Yogesh Jaluria

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The penetrative convection induced by a localized heat source at the bottom of a partially open enclosure, while the background ambient medium is stably and thermally stratified, is considered. A rectangular cavity with a partially open side is assumed to be adjacent to a long corridor which is stably stratified. The stable thermal stratification that is of interest is a two-layered one or a linear temperature stratification. A control-volume finite-difference method, in stream function and vorticity formulation, is employed for the solution. The influence of the stratification parameter is examined in the laminar flow regime by considering a range of stratification levels. Heat transfer results, mass outflow rate, penetration distance, velocity and temperature distributions are presented to quantify the penetrative convection. It is found that, for a step ambient temperature profils, the convective motion occurring in the lower unstable layer penetrates significantly into the stable upper layer only for a week stratification. Small penetration occurs at large stratification levels. The flow field reveals a multi-cellular pattern. Furthermore, it is observed that the penetrative motion occurs in the form of nearly horizontal motion in the lowest part of the stable upper-layer. The thermal field is studied in detail. Other important details on this penetrative transport are brought out.

Original languageEnglish (US)
Title of host publicationNatural Convection in Enclosures - 1992
PublisherPubl by ASME
Pages73-81
Number of pages9
ISBN (Print)0791809242
StatePublished - 1992
Event28th National Heat Transfer Conference and Exhibition - San Diego, CA, USA
Duration: Aug 9 1992Aug 12 1992

Publication series

NameAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume198
ISSN (Print)0272-5673

Other

Other28th National Heat Transfer Conference and Exhibition
CitySan Diego, CA, USA
Period8/9/928/12/92

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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