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作者:

Liu, Hui (Liu, Hui.) | Lei, Jun (Lei, Jun.) | Xu, Yanjie (Xu, Yanjie.)

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EI Scopus

摘要:

In this paper, the single-domain enthalpy model is adopted for heat transfer analysis of phase change during solidification processes. The resulting second-order parabolic partial differential equations (PDEs) with varying thermophysical coefficients is numerically solved by a hybrid generalized finite difference method (GFDM) under mixed boundary conditions. The spatial derivatives in the PDEs are approximated by the Taylor series expansions combining with the moving-least squares technique. The temporal derivative is evaluated with a six-point symmetric difference by the classical Crank-Nicholson technique. The Newton-Raphson iteration method is used to solve the resulting nonlinear algebraic equations. Finally, the transient temperature field and the moving phase-change interface are obtained by analysing the nodal temperature distribution. Several examples are presented for verify the stability and effectiveness of this meshless method. © Published under licence by IOP Publishing Ltd.

关键词:

Algebra Boundary conditions Finite difference method Heat conduction Iterative methods Laminated composites Nonlinear equations Partial differential equations Solidification Taylor series Temperature

作者机构:

  • [ 1 ] [Liu, Hui]Department of Engineering Mechanics, Beijing University of Technology, Beijing; 100124, China
  • [ 2 ] [Lei, Jun]Department of Engineering Mechanics, Beijing University of Technology, Beijing; 100124, China
  • [ 3 ] [Xu, Yanjie]Department of Engineering Mechanics, Beijing University of Technology, Beijing; 100124, China

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ISSN: 1757-8981

年份: 2019

期: 1

卷: 531

语种: 英文

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