Search

The new HLRS flagship system Hazel Hen (a Cray XC40) is Europe's fastest system in the High Performance Conjugate Gradients (HPCG) benchmarking list. Designed to provide maximum sustainable performance to the users of HLRS - ignoring both peak and Linpack performance numbers - it has even climbed to number 8 in the TOP500 list and is one of the fastest systems in the world used both by research and industry. This paper will present insight into the strategy that was at the heart of the HLRS decision. It will further show how Hazel Hen can and has already impacted research and industry by providing high sustained performance for real world applications. In this paper we will show two applications and discuss the industrial uptake of the system. [ABSTRACT FROM AUTHOR]

Abstract: We consider the second order wave equation in an unbounded domain and propose an advanced perfectly matched layer (PML) technique for its efficient and reliable simulation. In doing so, we concentrate on the time domain case and use the finite-element (FE) method for the space discretization. Our un-split-PML formulation requires four auxiliary variables within the PML region in three space dimensions. For a reduced version (rPML), we present a long time stability proof based on an energy analysis. The numerical case studies and an application example demonstrate the good performance and long time stability of our formulation for treating open domain problems. [Copyright &y& Elsevier]