Hierarchical Optimization in Isogeometric Analysis : Application to Thermal Conduction

A multi-level parametrization approach for a shape optimization problem is developed in the framework of Isogeometric Analysis for a thermal conduction problem. The Isogeometric Analysis approach proposed by T. Hughes, consists in integrating Finite Element Analysis (FEA) into conventional Computational Aided Design (CAD) tools using a single software entity. We propose two multi-levels parametrization strategies to improve the convergence rate of a thermal conduction optimization problem. Some numerical experiments are carried out using a two dimensional test-case, to demonstrate the efficiency of the proposed strategies.