STABILITY OF MIXED TIME INTEGRATION SCHEMES FOR TRANSIENT THERMAL ANALYSIS

Abstract

A current research topic in coupled-field problems is the development of effective transient algorithms that permit different time integration methods with different time steps to he used simultaneously in various regions of the problems. The implicit-explicit approach seems to be very successful in structural, fluid, and fluid-structure problems. This paper summarizes this research direction. A family of mixed time integration schemes, with the capabilities mentioned above, is also introduced for transient thermal analysis. A stability analysis and the computer implementation of this technique are also presented. In particular, it is shown that the mixed time implicit-explicit methods provide a natural framework for the further development of efficient, clean, modularized computer codes.