WIT Press


A Time-domain Precise BEM For Solving Transient Heat Conduction Problems With Variable Heat Conductivities

Price

Free (open access)

Paper DOI

10.2495/BEM360231

Volume

56

Pages

12

Page Range

273 - 284

Published

2014

Size

404 kb

Author(s)

Bo Yu, Wei-An Yao & Xiao-Wei Gao

Abstract

In this paper, the Green’s function for the Laplace equation is adopted to derive the boundary integral equation for solving transient heat conduction problems with variable heat conductivities and heat sources. As a result, domain integrals are involved in the derived integral equations. Firstly, the radial integration method is used to convert the domain integrals into equivalent boundary integrals. Then, by expanding variables at a discrete time interval, the recursive formulation of the governing equation is derived. Finally, the recursive equation is solved by the radial integration boundary element method. A self-adaptive check technique is carried out to estimate how many expansion terms are needed in a time step size. Numerical results show satisfactory performance. Keywords: time-domain precise algorithm, radial integration method, boundary element method, self-adaptive check, variable heat conductivity, heat source.

Keywords

time-domain precise algorithm, radial integration method, boundary element method, self-adaptive check, variable heat conductivity, heat source