Brian Fix

Stony Brook University

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James Glimm

Stony Brook University

Roman Samulyak

Stony Brook University

Lingling Wu

University of South China

Lori Freitag Diachin

Lawrence Livermore National Laboratory

T. Tautges

Argonne National Laboratory

Yuan-hua Li

Changchun University

Mark S. Shephard

Rensselaer Polytechnic Institute

Carl Ollivier‐Gooch

University of British Columbia

Jason A. Kraftcheck

University of Wisconsin–Madison

Harold E. Trease

Pacific Northwest National Laboratory

Cooperative Institutions

Stony Brook University

Rensselaer Polytechnic Institute

Chinese Academy of Sciences

Brookhaven National Laboratory

Lawrence Livermore National Laboratory

Argonne National Laboratory

Sandia National Laboratories

Los Alamos National Laboratory

Shanghai Jiao Tong University

University of Wisconsin–Madison

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FronTier and applications to scientific and engineering problems

PAMM (2007)

Wurigen Bo Brian Fix James Glimm Xiaolin Li Xingtao Liu

Abstract We report significant developments of the FronTier code and applications in science and engineering. The progress includes the extraction of an independent software library from the front tracking code, robust and accurate locally grid based method, applications to fluid mixing problem, fuel injection jet and fusion pellet injection in a magnetically confined plasma, among other problems. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Code (set theory)

10.1002/pamm.200700668

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Citations (3)

Interoperable mesh and geometry tools for advanced petascale simulations

Journal of Physics Conference Series (2007)

Lori Freitag Diachin Andy Bauer Brian Fix Jason A. Kraftcheck Kenneth E. Jansen

SciDAC applications have a demonstrated need for advanced software tools to manage the complexities associated with sophisticated geometry, mesh, and field manipulation tasks, particularly as computer architectures move toward the petascale. The Center for Interoperable Technologies for Advanced Petascale Simulations (ITAPS) will deliver interoperable and interchangeable mesh, geometry, and field manipulation services that are of direct use to SciDAC applications. The premise of our technology development goal is to provide such services as libraries that can be used with minimal intrusion into application codes. To develop these technologies, we focus on defining a common data model and data-structure neutral interfaces that unify a number of different services such as mesh generation and improvement, front tracking, adaptive mesh refinement, shape optimization, and solution transfer operations. We highlight the use of several ITAPS services in SciDAC applications.

Petascale computing

10.1088/1742-6596/78/1/012015

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Citations (9)

Front Tracking under TSTT

James Glimm Brian Fix Xin-Ran Li J. Liu X. Liu

We report several important developments of the front tracking method and applications in science and engineering under the TSTT project. The progress includes the extraction of an independent software library from the front tracking code, conservative front tracking, applications of front tracking to the simulation of fusion pellet injection in a magnetically confined plasma, the study of a fuel injection jet, and the study of fluid chaotic mixing, among other problems.

Tracking (education)

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A TSTT integrated FronTier code and its applications in computational fluid physics

Journal of Physics Conference Series (2005)

Brian Fix James Glimm Xiaolin Li Yuan-hua Li Xinfeng Liu

We introduce the FronTier-Lite software package and its adaptation to the TSTT geometry and mesh entity data interface. This package is extracted from the original front tracking code for general purpose scientific and engineering applications. The package contains a static interface library and a dynamic front propagation library. It can be used in research of different scientific problems. We demonstrate the application of FronTier in the simulations of fuel injection jet, the fusion pellet injection and fluid mixing problems.

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Interface (matter)

Software package

Code (set theory)

10.1088/1742-6596/16/1/064

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Citations (8)

Tighter tolerances at lower costs

D.C. Thompson Brian Fix

The national laboratories, the National Bureau of Standards, and private industry have all played critical roles in developing the standards that have established precision engineering in the United States. In this article, the author discusses some of the areas where technology transfer has taken place between these groups.

Technology Transfer

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A simple package for front tracking

Journal of Computational Physics (2005)

Jian Du Brian Fix James Glimm Xicheng Jia Xiaolin Li

Robustness

Tracking (education)

Code (set theory)

10.1016/j.jcp.2005.08.034

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Citations (155)

Verification and validation of FronTier code and application to fluid interfacial instabilities

Physica Scripta (2008)

Brian Fix James Glimm Ryan Kaufman Xiaolin Li Lingling Wu

Study of fluid instabilities such as Rayleigh?Taylor and Richtmyer?Meshkov instabilities requires accurate computational modeling of dynamically moving fronts. This paper reports the verification and validation of the FronTier code and its applications to the fluid mixing problem. We show that the Lagrangian front tracking method provides high resolution to the front and the tracked solution gives significant enhancement of buoyancy acceleration in Rayleigh?Taylor instability and enstrophy generation in the shock-driven Richtmyer?Meshkov instability.

Frontier

Code (set theory)

10.1088/0031-8949/2008/t132/014049

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Citations (2)

Front Tracking and Adaptive Mesh Refinement

Brian Fix

Tracking (education)

Adaptive Mesh Refinement

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The TSTT Mesh Interface

45th AIAA Aerospace Sciences Meeting and Exhibit (2006)

Carl Ollivier‐Gooch Kyle Chand Tamara L. Dahlgren Lori Freitag Diachin Brian Fix

PDE-based numerical simulation applications commonly use basic software infrastructure to manage mesh, geometry, and discretization data. The commonality of this infrastructure implies the software is theoretically amenable to re-use. However, the traditional reliance on library-based implementations of these functionalities hampers experimentation with different software instances that provide similar functionality. This is especially true for meshing and geometry libraries where applications often directly access the underlying data structures, which can be quite different from implementation to implementation. Thus, using different libraries interchangeably or interoperably for this functionality has proven difficult at best and has hampered the wide spread use of advanced meshing and geometry tools developed by the research community. To address these issues, the Terascale Simulation Tools and Technologies center is working to develop standard interfaces to enable the creation of interoperable and interchangeable simulation tools. In this paper, we focus on a languageand data-structure-independent interface supporting query and modification of mesh data conforming to a general abstract data model. We describe the model and interface, and provide programming “best practices” recommendations based on early experience implementing and using the interface.

Interface (matter)

10.2514/6.2006-529

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Citations (6)