Self-Propagating Reactive Fronts in Compacts of Multilayered Particles
Joint Authors
Sraj, Ihab
Vohra, Manav
Alawieh, Leen
Weihs, Timothy P.
Knio, Omar M.
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-03-24
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Reactive multilayered foils in the form of thin films have gained interest in various applications such as joining, welding, and ignition.
Typically, thin film multilayers support self-propagating reaction fronts with speeds ranging from 1 to 20 m/s.
In some applications, however, reaction fronts with much smaller velocities are required.
This recently motivated Fritz et al.
(2011) to fabricate compacts of regular sized/shaped multilayered particles and demonstrate self-sustained reaction fronts having much smaller velocities than thin films with similar layering.
In this work, we develop a simplified numerical model to simulate the self-propagation of reactive fronts in an idealized compact, comprising identical Ni/Al multilayered particles in thermal contact.
The evolution of the reaction in the compact is simulated using a two-dimensional transient model, based on a reduced description of mixing, heat release, and thermal transport.
Computed results reveal that an advancing reaction front can be substantially delayed as it crosses from one particle to a neighboring particle, which results in a reduced mean propagation velocity.
A quantitative analysis is thus conducted on the dependence of these phenomena on the contact area between the particles, the thermal contact resistance, and the arrangement of the multilayered particles.
American Psychological Association (APA)
Sraj, Ihab& Vohra, Manav& Alawieh, Leen& Weihs, Timothy P.& Knio, Omar M.. 2013. Self-Propagating Reactive Fronts in Compacts of Multilayered Particles. Journal of Nanomaterials،Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-1007354
Modern Language Association (MLA)
Sraj, Ihab…[et al.]. Self-Propagating Reactive Fronts in Compacts of Multilayered Particles. Journal of Nanomaterials No. 2013 (2013), pp.1-11.
https://search.emarefa.net/detail/BIM-1007354
American Medical Association (AMA)
Sraj, Ihab& Vohra, Manav& Alawieh, Leen& Weihs, Timothy P.& Knio, Omar M.. Self-Propagating Reactive Fronts in Compacts of Multilayered Particles. Journal of Nanomaterials. 2013. Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-1007354
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1007354