ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Natural convection in a series of thermally interacting cavities with wall mounted heaters

Gavara, Madhusudhana (2012) Natural convection in a series of thermally interacting cavities with wall mounted heaters. In: Numerical Heat Transfer, Part A, 62 (11). pp. 861-883.

[img] PDF
Num_hea_Tran_62-11_861_2012.pdf - Published Version
Restricted to Registered users only

Download (1MB) | Request a copy
Official URL: http://dx.doi.org/10.1080/10407782.2012.703085

Abstract

Laminar natural convection in a series of thermally interacting cavities is numerically studied. Each cavity consists of a conducting bottom wall with a surface mounted heater. The side walls of the cavities are isothermally cooled. Each cavity thermally interacts with its adjacent cavities through the conducting walls. Flow and heat transfer characteristics are studied in detail for various Rayleigh numbers. The convection characteristics in multiple cavities are compared with those in single independent cavity. The thermal interaction between the cavities results in lower temperatures compared with those in independent cavities. While heat is rejected into the adjacent upper cavity through some portion of the conducting wall, heat is received from the adjacent cavity through the remaining portion of the wall. The influence of substrate conductivity on heat exchange between adjacent cavities are examined. Substrate conductivity shows strong effect on temperature distribution. When cooling at both vertical sides is changed to one side cooling, the heat transfer characteristics are changed drastically and many interesting flow features are observed. Effects of cavity aspect ratio is studied and higher heat transfer rates are observed at higher aspect ratios. Correlations for dimensionless temperature maximum and average Nusselt number are presented in terms of Rayleigh number.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Taylor and Francis Ltd.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 26 Feb 2013 12:23
Last Modified: 26 Feb 2013 12:23
URI: http://eprints.iisc.ac.in/id/eprint/45418

Actions (login required)

View Item View Item