A Finite Element Analysis of Thermal Convection Problems with the Joule Heat

Daisuke Tagami, Hajime Itoh

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Error estimates are introduced in a finite element approximation to thermal convection problems with the Joule heat. From the Joule heat, a nonlinear source term arises in the convection-diffusion part of problems. The derivation of the estimates is based on the fact that a finite element approximation to the electric potential appearing in such a nonlinear term is uniformly bounded in the cubic summable norm with derivatives up to the first order. The error estimates are optimal, and do not require any stability conditions. Numerical results show that the numerical convergence rates agree well with the theoretical ones, and that phenomena in a simplified electric glass furnace are influenced by the electric potential distributions associated with the location of electrodes.

Original languageEnglish
Pages (from-to)193-210
Number of pages18
JournalJapan Journal of Industrial and Applied Mathematics
Volume20
Issue number2
Publication statusPublished - Jun 2003

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Thermal Convection
Electric Potential
Finite Element Approximation
Error Estimates
Heat
Finite Element
Finite element method
Nonlinear Source
Convection-diffusion
Furnace
Source Terms
Stability Condition
Electrode
Glass furnaces
Convergence Rate
Electric furnaces
Electric potential
First-order
Norm
Derivative

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Applied Mathematics

Cite this

A Finite Element Analysis of Thermal Convection Problems with the Joule Heat. / Tagami, Daisuke; Itoh, Hajime.

In: Japan Journal of Industrial and Applied Mathematics, Vol. 20, No. 2, 06.2003, p. 193-210.

Research output: Contribution to journalArticle

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