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Stability and stabilization of garnissage on surface in cylindrical channel
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
2019 (English)In: International journal of thermal sciences, ISSN 1290-0729, E-ISSN 1778-4166, Vol. 140, p. 442-454Article in journal (Refereed) Published
Abstract [en]

The developed mathematical models of parametric oscillations on the phase change boundaries in a cylindrical channel are presented in a continuation of the previously published paper, which made an introduction to the subject. Analysis of the advanced models and processes described by them, together with the computer simulations, revealed a number of important features of the complex systems with dynamical boundaries of the phase change. Influence of the diverse factors and parameters with their interconnections is investigated in detail: the Peclet number, Bio number, modified Bio number (for the heat flux control system), the ratios of physical properties for the liquid and solid phases, a thickness of a solid layer, and the wave numbers of oscillations. Parameters of a garnissage on the internal surface of a cylindrical channel and the regularities of its instability are discussed for the linear and nonlinear cases. A possibility for the system's stabilization against unstable perturbations is examined using the automatic heat flux control. The control parameters are estimated in computer simulation for a wide range of the variable parameters. The results may be useful for the wall's protection against destruction with the artificially controlled garnissage in the metallurgical machines, as well as in some other applications.

Place, publisher, year, edition, pages
Elsevier Masson SAS , 2019. Vol. 140, p. 442-454
Keywords [en]
Garnissage, Heat flux control, Liquid-solid interface, Melt, Solidification, Stabilization, Wall protection, Melting, Phase interfaces, Flux control, Liquid-solid interfaces, Metallurgical machines, Parametric oscillations, Stability and stabilizations, Variable parameters, Heat flux
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-252479DOI: 10.1016/j.ijthermalsci.2019.03.012ISI: 000470680300036Scopus ID: 2-s2.0-85063079250OAI: oai:DiVA.org:kth-252479DiVA, id: diva2:1337230
Note

QC 20190712

Available from: 2019-07-12 Created: 2019-07-12 Last updated: 2019-07-12Bibliographically approved

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Kazachkov, Ivan

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