Title

Modeling of a reacting nanofilm on a composite substrate

Authors

Authors

N. Amini-Manesh; S. Basu;R. Kumar

Comments

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Abbreviated Journal Title

Energy

Keywords

Nanoenergetic material; Heat transfer in composites; Flame speed; MULTILAYER THIN-FILMS; PROPAGATION; COMBUSTION; FOILS; Thermodynamics; Energy & Fuels

Abstract

This article provides a detailed computational analysis of the reaction of dense nanofilms and the heat transfer characteristics on a composite substrate. Although traditional energetic compounds based on organic materials have similar energy per unit weight, non-organic material in nanofilm configuration offers much higher energy density and higher flame speed. The reaction of a multilayer thin film of aluminum and copper oxide has been studied by varying the substrate material and thicknesses. The numerical analysis of the thermal transport of the reacting film deposited on the substrate combined a hybrid approach in which a traditional two-dimensional black box theory was used in conjunction with the sandwich model to estimate the appropriate heat flux on the substrate accounting for the heat loss to the surroundings. A procedure to estimate this heat flux using stoichiometric calculations is provided. This work highlights two important findings. One is that there is very little difference in the temperature profiles between a single substrate of silica and a composite substrate of silicon silica. Secondly, with increase in substrate thickness, the quenching effect is progressively diminished at a given speed. These findings show that the composite substrate is effective and that the average speed and quenching of flames depend on the thickness of the silica substrate, and can be controlled by a careful choice of the substrate configuration. (C) 2011 Elsevier Ltd. All rights reserved.

Journal Title

Energy

Volume

36

Issue/Number

3

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

1688

Last Page

1697

WOS Identifier

WOS:000289337600034

ISSN

0360-5442

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