Heat transfer original studies –Theory and applications

Abstract

Abstract Thermal stresses, thermal fatigue, materials’ constants variation with the temperature, residual stresses and micro-structure of the parts after the solidification process are heat transfer phenomenon related problems. The calculation instrument of a given age of science and technology has a great influence on the mathematical solutions and the according applications in engineering. The paper presents a synthesis, including the authors’ contributions in the heat transfer problems, which may be regarded in a broader context of the distinct branches of engineering that are the fields of expertise of the authors. The first step is to analyse the theoretical aspects to be mastered in order to wisely apply them in concrete engineering problems. In this way, there are presented the basic equations used by the authors in their analytical studies and the background of the numerical methods used in engineering, i.e. the finite difference method and the finite element method. In the following case studies are presented the influences of the heat transfer in an internal combustion engine related phenomena, the connections with the casting manufacturing process and some interesting aspects regarding the connections between the melt temperature with the residual stresses. To conclude, the distinct fields of expertize of the authors are useful to present the various facets of the heat transfer problem which is one of their long run concerns in research.