New Capabilities for the Enzo Community Code in the Petascale Era

AST-0808184 NormanEnzo是由加州大学圣地亚哥分校计算天体物理实验室(LCA)开发的三维并行自适应网格加密混合(流体+粒子)开源社区代码，用于天体物理和宇宙模拟。恩佐支持了许多天文学家在不同领域的研究，如原始恒星形成、星系形成、星际介质、星系团、星际湍流和银河系恒星形成。千万亿级计算平台的到来将把这些和其他研究带入物理实在论的新领域，但不会没有适当的并行应用软件，其开发需要领域科学家、应用数学家和计算机科学家组成的跨学科团队的努力，例如已经在LCA组装的团队。本项目将在为千万亿级平台设计的一个新的平行框架内增加Enzo的辐射磁流体力学能力，并将包括三个年度软件版本和两个用户讲习班。这些能力将在宇宙结构形成、星际湍流和恒星形成方面实现更大范围和更高动态范围的模拟，并在需要复杂物理和高空间动态范围的地方开辟新的可能性。除了直接的研究影响外，这项工作将成为跨部门合作的跳板，将数学、物理和计算机科学的研究生聚集到一个协调的项目中。根据加州大学圣地亚哥分校版权下的广泛访问政策分发的Enzo的社区代码性质，以及作为该项目一部分的用户友好的打包和支持，将使天体物理学和其他学科中的广泛多尺度应用程序能够利用拍级计算。

AST-0808184NormanEnzo is a three-dimensional parallel adaptive mesh refinement hybrid (fluid plus particle) open-source community code for astrophysical and cosmological simulations developed at the Laboratory for Computational Astrophysics (LCA) at the University of California-San Diego. Enzo underpins the research of many astronomers in areas as diverse as primordial star formation, galaxy formation, the intergalactic medium, galaxy clusters, interstellar turbulence, and Galactic star formation. The arrival of petascale computing platforms will take these and other researches into a new realm of physical realism, but not without appropriate parallel application software, whose development requires effort by an interdisciplinary team of domain scientists, applied mathematicians, and computer scientists, such as has been assembled at the LCA. The present project will add radiation magnetohydrodynamics capabilities to Enzo within a new parallel framework designed for petascale platforms, and will include three annual software releases and two user workshops. These capabilities will enable larger-scale and higher dynamic range simulations in cosmological structure formation, interstellar turbulence, and star formation, as well as open up new possibilities wherever complex physics and high spatial dynamic range are needed.In addition to direct research impacts, this work will serve as a springboard for inter-departmental collaborations, bringing together graduate students from mathematics, physics and computer science into a coordinated program. The community-code nature of Enzo, distributed under UCSD policies for wide access under copyright, and with the user-friendly packaging and support which are part of this project, will enable a wide range of multiscale applications throughout astrophysics and other disciplines to harness petascale computing.