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UNSTABLE ANISOTHERMAL MULTICOMPONENT CONVECTIVE FLOW: FROM SMALL TO LARGE SCALES

卷 4, 册 6, 2012, pp. 549-566
DOI: 10.1615/ComputThermalScien.2012006451
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摘要

The present document covers fundamental, academic, and practical topics. Indeed, the mixed convection in channels heated and cooled differentially has been studied in relation to several practical applications. Most interest in these flows are encountered in several domains to explain certain geological phenomena and atmospheric flows, and intervene in many industrial applications such as cooling of electronic appliances, plastics manufacturing, building sciences, moisture transfer, or in the chemical vapor deposition and other crystal growth techniques. It either permits simulation of pollution problems or storage of different fluid mixtures either in natural storage (traps structures) or in industrial tanks. Being bound by any such applications, the subject is currently open for exploration in order to enrich our knowledge of this complicated problem. We consider three-dimensional thermosolutal mixed convection with flow confined between two parallel and horizontal planes where the lower and upper surfaces are hot and cold, respectively. Such a configuration of convective flows is referred to as Poiseuille−Rayleigh−Benard, (PRB) which is based on the famous Rayleigh−Benard problem. In such a PRB configuration, the flow results from the superposition of two convective sources; i.e., the horizontal pressure gradient that causes the main flow within the duct and a vertical temperature and/or concentration gradient, which are the cause of thermoconvective structure formations. The stability diagram and the effect of the entrance domain on the exchanges are presented. We classify the different behaviors and we complete the classical stability analysis by linear stability on a bounded domain. The numerical results demonstrate explicitly the important effect of the entrance domain on the obtained solution and also on the resulting exchange (heat and mass).

对本文的引用
  1. Buonomo Bernardo, Ferraro Giuseppe, Manca Oronzio, Marinelli Lorenzo, Nardini Sergio, Mixed convection in horizontal channels partially filled with aluminium foam heated from below and with external heat losses on upper plate, Journal of Physics: Conference Series, 501, 2014. Crossref

  2. Buonomo Bernardo, Fardella Vincenzo, Manca Oronzio, Nardini Sergio, Vigna Silvio, Investigation on Thermal and Fluid Dynamic Behaviors in Mixed Convection in Horizontal Channels with Aluminum Foam and Heated from Below, E3S Web of Conferences, 197, 2020. Crossref

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