文章基本信息

标题：First Steps Toward a Parallel, Flexible, and Configurable Mesh Database for Unstructured Mesh Applications
本地全文：下载
作者：Juan P. Saldía ; Sergio A. Elaskar
期刊名称：Mecánica Computacional
印刷版ISSN：2591-3522
出版年度：2016
卷号：34
期号：20
页码：1267-1267
语种：English
出版社：CIMEC-INTEC-CONICET-UNL
其他摘要：Unstructured mesh-based methods, have certain features which make them very attractive when geometric ﬂexibility and/or solution-adaptive techniques are considered, as is common in numerical simulations in different domains of engineering. Unstructured mesh oriented systems require the maintaining of a data structure, generally known as mesh database, which main purpose is the management of general information regarding the topology, geometry and the (discrete) ﬁelds which are deﬁned on the elements of the mesh. In general, this requirement impacts in the form of an exponential increment of software complexity of these systems in comparison to their structured mesh oriented counterpart, where the information regarding the mesh and ﬁelds is almost trivially obtained. The complexity of the mesh database is even more pronounced when parallel functionality is required and/or ﬂexible and conﬁgurable capabilities are considered. Most scientiﬁc-computing oriented solutions in the literature relies on application-tailored mesh databases (libMesh, deal.II), which are not directly adaptable to general applications, or in more generic mesh databases (FMDB, ParFUM, DUNE), which neverthless are not ﬂexible enough in how the information stored in the mesh database is conﬁgured. In this work, we present our ﬁrst steps towards the development of an open-source library with the aim of providing a mesh database with the following design goals in mind: generality, efﬁciency, freedom of conﬁguration, ease of use, and complete functionality in parallel systems. In particular, we describe details of data structures and generic algorithms, which in combination with C++ template meta-programming techniques aims to provide efﬁciency, generality and freedom of conﬁguration by the user. Some details of how the library achieves functionality on parallel systems through the MPI Standard, are also discussed. An object oriented interface which hides the details of the library implementation to the user and provides ease of access from current C++ codes and modern Fortran codes is brieﬂy described, and a generic demonstration of the library usage is shown. Finally, we present an example of the incorporation of the library in an already functional in-house developed parallel unstructured mesh ﬂuid dynamic solver for hypersonic nonequilibrium ﬂows.