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Heat Transfer Research
インパクトファクター: 1.199 5年インパクトファクター: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2018019605
pages 369-384

DUAL-PHASE-LAG HEAT CONDUCTION IN AN FG HOLLOW SPHERE: EFFECT OF THERMAL PULSE TYPE AND LOCATION OF A HEAT SOURCE

Majid Bakhtiari
Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16844, Iran
Kamran Daneshjou
Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16844, Iran
Hossein Parsania
Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16844, Iran

要約

The purpose of this paper is to introduce a new mathematical model to solve the heat conduction equation based on the Dual-Phase-Lag (DPL) theory for investigation of temperature field affected by thermal pulse and heat source location on an FG hollow sphere. This new model, named augmented state space method, based on the laminate approximation theory in the Laplace domain, can obtain a transient solution, and then the results obtained are converted into the time domain by applying the numerical Laplace transform inversion with consideration of Gibb's phenomenon. Numerical analyses show the effects of thermal pulse and heat source location and phase lags ratio as boundary conditions on the distribution of temperature on an FG sphere. It is clear that the thermal pulse functions and location of a heat source have different effects on the temperature distribution. In addition, by changing the phase lags ratios, the temperature distribution on a radius and in time history are obtained. Eventually, the results obtained by this method are verified by using some problems available in the literature.


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