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[2880] Artykuł:

The XFEM for nonlinear thermal and phase change problems

Czasopismo: International Journal of Numerical Methods for Heat & Fluid Flow   Tom: 25, Zeszyt: 2, Strony: 400-421
ISSN:  0961-5539
Wydawca:  EMERALD GROUP PUBLISHING LIMITED, HOWARD HOUSE, WAGON LANE, BINGLEY BD16 1WA, W YORKSHIRE, ENGLAND
Opublikowano: 2015
 
  Autorzy / Redaktorzy / Twórcy
Imię i nazwisko Wydział Katedra Procent
udziału
Liczba
punktów
Paweł Stąpór orcid logoWZiMKKatedra Informatyki i Matematyki Stosowanej**10025.00  

Grupa MNiSW:  Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A)
Punkty MNiSW: 25
Klasyfikacja Web of Science: Article


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Keywords:

XFEM  Newton-Raphson method  Stefan-like problem 



Abstract:

Purpose
Of particular interest is the ability of the extended finite element method (XFEM) to capture transient solution and motion of phase boundaries without adaptive re-meshing or moving-mesh algorithms for a physically non-linear phase change problem.

Design/methodology/approach
The extended finite element method (XFEM) is applied to solve nonlinear transient problems with a phase change. Thermal conductivity and volumetric heat capacity are assumed to be dependent on temperature. The nonlinearities in the governing equations make it necessary to employ an effective iterative approach to solve the problem. The Newton-Raphson method is used and the incremental discrete XFEM equations are derived.

Findings
The robustness and utility of the method are demonstrated on several one-dimensional benchmark problems.

Originality/value
The novel procedure based on the XFEM is developed to solve physically non-linear phase change problems.