Determination of Unsteady Container Temperatures during Freezing of Three-dimensional Organs with Constrained Thermal Stresses

Abstract

A fully automatic procedure for maximizing the minimal local freezing rate in an organ while maintaining the local thermal stresses below a specified level throughout the arbitrarily shaped and sized three-dimensional organ made of different materials has been developed. This was achieved by determining correct variation of unsteady temperature distribution on the walls of the three-dimensional freezing container. A time-accurate finite element computer program was used to predict unsteady heat conduction with phase change and thermal stresses within the realistically shaped organs. A micro-genetic algorithm was then used to achieve nonlinear constrained optimization of time-varying container wall temperature distribution so that the prescribed maximum allowable thermal stress levels are never exceeded throughout the organ.

12 Figures and Tables

Cite this paper

@inproceedings{DennisDeterminationOU, title={Determination of Unsteady Container Temperatures during Freezing of Three-dimensional Organs with Constrained Thermal Stresses}, author={Brian H. Dennis} }