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On the use of stimulated thermocapillary currents and virtual walls as computational tools for natural convection simulation in enclosed spaces

Arias, FJ and Parks, GT (2015) On the use of stimulated thermocapillary currents and virtual walls as computational tools for natural convection simulation in enclosed spaces. International Journal of Thermal Sciences, 95. pp. 47-52. ISSN 1290-0729

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Abstract

© 2015 Elsevier Masson SAS. All rights reserved. A new, alternative approach is proposed for natural convection simulation by means of stimulated thermocapillary currents created by virtual walls. In contrast to the well-known effective thermal conductivity model, in the proposed approach it is the mass motion due to the convective currents which is intended to be simulated and the heat flux is a consequence of such flows. As a result, no a priori knowledge of the Nusselt number is needed and thus the approach is more suitable for complex geometries. Utilizing a simplified physical model and the definition of hydraulic diameter, a generalized expression for enclosed geometries is derived which offers thermal engineers a powerful analysis tool that can use virtual walls with an associated fictitious Marangoni stress for pre-screening and estimation of Nusselt numbers.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:42
Last Modified: 03 Aug 2017 03:13
DOI: