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Team for Advanced Flow Simulation and Modeling



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AHPCRC Bulletin: Winter/Spring 1996 - Volume 6 Number 1-2

AHPCRC NEWS BRIEFS

Anita Anderson (AHPCRC-UM)

Harold Breaux Retires from the Army Research Laboratory

Harold Breaux, formerly Chief, High Performance Computing Division, Army Research Laboratory, retired from civil service on 31 March 1996. Harold has played a prominent role in establishing the Army Research Laboratory (and formerly Ballistic Research Laboratory) as a major player in high performance computing. Harold's efforts have resulted in a succession of high performance computing acquisitions starting with a CDC 7600 and continuing with a CRAY X-MP and CRAY-2.

As the DoD HPC Modernization Program unfolded, Harold was there taking a leading role in the process that has led to the Army Research Laboratory being designated as a site for a Major Shared Resource Center.

In earlier days, Harold was an active researcher in mathematical modeling and has a long list of technical publications and accomplishments. Harold has given the Army, the Department of Defense, and all of us not only a legacy of past successes, but the blueprint for excellence in the future.


Harold Breaux (left) and Paul Muzio (AHPCRC) who presented Harold with poster representing the ARL/AHPCRC Partnership and recognizing Harold's many contributions to the success of that partnership
In appreciation of Harold's friendship, assistance and guidance, we, on behalf of the Army High Performance Computing Research Center, extend to Harold and his wife, Priscilla, our wishes for a long and active and exceedingly happy retirement.

Short Course in Finite Element Flow Simulations Held at AHPCRC

During the week of December 18, a short course in Finite Element Flow Simulations took place at the AHPCRC. The course was organized by the University of Minnesota Aerospace Engineering and Mechanics (AEM) Finite Element Group of Tayfun Tezduyar, and its purpose was to introduce the new group members and the collaborative researchers from the Natick Research, Development and Engineering Center (RDEC) to some of the computational techniques in use by the AEM Finite Element Group at the AHPCRC. The course material centered on the finite element methodology applied to compressible and incompressible flow problems. Participants included Ismail Guler, Matt Litke and Chris Waters, all AHPCRC researchers and students in AEM, and Earl Steeves and Keith Stein from Natick RDEC.

A class on parallel programming was taught by Marek Behr (AHPCRC-UM). The session covered Thinking Machines CM-5 and CRAY T3D programming techniques, using the Connection Machine Fortran paradigm for the CM-5, and both the data-parallel CRAFT and the message-passing PVM approaches for the T3D. Behr introduced basic scalable finite element implementation and scientific visualization concepts, and also conducted a demonstration of various visualization packages, including Visual3 and Ensight, in the AHPCRC graphics and visualization lab.

Andrew Johnson (AHPCRC-UM) spoke to the participants about 3D surface modeling and automatic mesh generation. His session was devoted to mesh moving implementation, as well as fluid-body interaction implementation. Shahrouz Aliabadi (AHPCRC-UM) talked about compressible flow streamline-upwind/Petrov-Galerkin implementation and his experiences with large-scale computations on the T3D. Aliabadi also discussed the computational aspects of modeling moving mechanical components, and combustion and hypersonic flow. Vinay Kalro (AHPCRC-UM) presented material on programming of workstation clusters and matrix-free iterative solution techniques for large, coupled, nonlinear equation systems. Stephen Ray (AHPCRC-UM) explained his notes on fluid-structure interaction implementation.

One day of the course was devoted entirely to one-on-one training sessions, with the participants gaining hands-on experience with the finite element CM-5 and T3D codes used by the Tezduyar research group.

AIAA Technical Committee Visits the AHPCRC

During the month of May, the AIAA (American Institute of Aeronautics and Astronautics) Technical Committee on Aerodynamic Decelerator Systems, visited the AHPCRC. The Committee's responsibilities are to plan for conferences and short courses, and to develop other technical activities in the area of aerodynamic decelerators (primarily parachutes). The Committee is made up of individuals from universities, industry, government, and national labs and meets semi-annually at various locations.

Minneapolis, Minnesota was chosen as the site for the May meeting in order to afford the committee an opportunity to visit the AHPCRC. Tayfun Tezduyar, the AHPCRC Director, briefed the group on the mission and goals of the Center. They were also given a tour of the high performance computing systems available at the Center as well as the Center's graphics and visualization laboratory and classroom facilities.