Dual reciprocity BEM–BDIM technique for conjugate heat transfer computations

Abstract

Numerical simulation of conjugate heat transfer problems by methods based on the boundary element method (BEM) promises great flexibility of the computational model. A combination of dual reciprocity BEM for computation of heat conduction in solid regions with boundary domain integral method for computation of heat transfer and fluid flow in fluid regions represents a promising way in numerical simulation of conjugate heat transfer. It combines boundary-only discretisation of solid parts and boundary and internal discretisation of fluid regions. In order to efficiently apply iterative solvers, the subdomain technique is used both in solid and in fluid parts of the computational domain. The results are compared with those of a thermal shock problem achieved by a pure boundary domain integral formulation and is verified on the test case of conjugate natural convection in a cavity with conducting side wall.