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Modeling of a reacting nanofilm on a composite substrate

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  • Amini-Manesh, Navid
  • Basu, Saptarshi
  • Kumar, Ranganathan

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.

Suggested Citation

  • Amini-Manesh, Navid & Basu, Saptarshi & Kumar, Ranganathan, 2011. "Modeling of a reacting nanofilm on a composite substrate," Energy, Elsevier, vol. 36(3), pages 1688-1697.
  • Handle: RePEc:eee:energy:v:36:y:2011:i:3:p:1688-1697
    DOI: 10.1016/j.energy.2010.12.061
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    References listed on IDEAS

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    1. Song, Guolin & Ma, Sude & Tang, Guoyi & Yin, Zhansong & Wang, Xiaowei, 2010. "Preparation and characterization of flame retardant form-stable phase change materials composed by EPDM, paraffin and nano magnesium hydroxide," Energy, Elsevier, vol. 35(5), pages 2179-2183.
    2. Chen, Y. & Kim, H., 2010. "Preparation and application of sodium borohydride composites for portable hydrogen production," Energy, Elsevier, vol. 35(2), pages 960-963.
    3. Fang, Guiyin & Li, Hui & Chen, Zhi & Liu, Xu, 2010. "Preparation and characterization of stearic acid/expanded graphite composites as thermal energy storage materials," Energy, Elsevier, vol. 35(12), pages 4622-4626.
    4. Saulov, Dmitry N. & Plumb, Ovid A. & Klimenko, A.Y., 2010. "Flame propagation in a gasification channel," Energy, Elsevier, vol. 35(3), pages 1264-1273.
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    Cited by:

    1. Torabi, Mohsen & Zhang, Kaili, 2014. "Temperature distribution and classical entropy generation analyses in an asymmetric cooling composite hollow cylinder with temperature-dependent thermal conductivity and internal heat generation," Energy, Elsevier, vol. 73(C), pages 484-496.

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