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Indexed by:期刊论文

Date of Publication:2011-04-01

Journal:CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES

Included Journals:Scopus、SCIE、EI

Volume:74

Issue:2

Page Number:139-159

ISSN No.:1526-1492

Key Words:convection-diffusion; heat transfer; adaptive algorithm; time domain; FEM

Abstract:A piecewised adaptive algorithm in the time domain is presented to solve the transient convection-diffusion heat transfer problem. By expanding all variables at a time interval, an initial and boundary value problem is decoupled into a series of recursive boundary value problems which can be solved by FEM or other well developed numerical schemes to deal with boundary value problems. A steady computing accuracy can be adaptively maintained via the power increase of the expansion, particularly when the step size varies in the whole computing process. Additionally for the nonlinear cases, there is no requirement of iteration and additional assumption for the proposed algorithm. Three numerical examples are provided to verify the presented algorithm,and satisfactory results have been achieved.