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Exceptional Service in the National Interest

 

Personal Information
Name: Dr. Daniel W. Barnette
Work address:

MS 1110
Sandia National Laboratories
Albuquerque, NM 87185-1110
Work phone/fax: (505) 845-7874
E-mail: dwbarne@sandia.gov

 

Professional Experience
1977-present: Sandia National Laboratories
Current title: Senior Member Technical Staff
Current Assignment: Scalable Systems Integration Dept. 9224
Previous Assignment: Parallel Computational Sciences Department;
Aerodynamics Division

 

Education
June, 1984 Ph.D., Dept. of Aeronautics and Astronautics, Stanford University, Stanford, California Dissertation title: "Numerical Investigations into the Parabolized Navier-Stokes Equations"
June, 1977 M.S., Dept. of Aerospace Engineering, University of Texas, Austin, Texas Thesis title: "The Effects of Massive Blowby on the Initial Trajectory of a Free-flight Rocket"
June, 1976 B.S., Dept. of Aerospace Engineering, University of Texas, Austin, Texas Under-graduate project and report: "Experimental Investigation of Supersonic Flow Past a Wedge-Cylinder Configuration"
May, 1973 Associates Degree, Texarkana Jr. College, Texarkana, Texas  

 

Technical Areas of Expertise at Sandia National Labs
2003-present

My work with ASCI Red Supercomputer over this FY has involved:

  1. Ongoing improvement of evaluation test codes including:
    1. Debugging test code as needed
    2. Improving run scripts for eval tests
    3. Documenting significant changes re: eval tasks/procedures in web pages
  2. Being assigned the task to rewrite a major eval-test run script called Munops/IO-Munops, which involved changing the script that ran previously only as root to:
    1. as root, setup the run, partition the test machine, stop services, etc.;
    2. as user, run the test submission; and
    3. as root, stop the run, remove partitions, restart services, and/or reboot.

The purpose of above assignment was to allow Computer Associates personnel in San Diego to run these tests as user and without the need for having root privileges. This task was completed and several eval tests have been run with the new scripts.

  1. Ongoing maintenance, updates, and page creation for extensive eval test web sight at Sandia
  2. Participating in weekly teleconferences with the ASCI Red team
  3. Documenting eval test results, including
    1. a summary report that documents each test suite’s passes and failures
    2. placing relevant eval notes and documents on the eval web site
  4. Archiving eval test results on Sandia’s SMSS mass storage system
  5. Writing test plan procedures for Janus eval tests
  6. Tracking certain test runs to document sub-test failure patterns
  7. Working closely with the Tflops OS team to resolve each eval test failure, if failures occur
  8. Updating the eval CVS directory when changes are made to any eval test suite
  9. Working closely with Computer Associates personnel up until contract end date of Dec 31 2003; work involved running eval tests to help CA search for OS problems
  10. Being solely responsible for building new Tflops OS versions and installing OS patches on eval machines for testing (task taken over from Sue Kelly when she moved to Red Storm full time)
  11. Being solely responsible for running extensive eval tests on all new OS versions, taking approximately 1 week to complete while running tests on 4 mini-Tflops machines, most simultaneously
  12. Being solely responsible for running eval test on Janus as final assurance a new OS version is ready for production
  13. Being assigned the task of installing and testing new PGI compilers for Tflops; compilers are due to be delivered to Sandia soon
2000-2003 With Sue Kelly and others, ongoing evaluation of operating system software integrity of Intel's Teraflops Supercomputer at Sandia; maintain and improve evaluation software suite (500MBytes of source code); improve Intel's evaluation web pages; develop and maintain Sandia's version of evaluation web pages; also involved in developing test and evaluation software for the Cray Red Storm Supercomputer to be delivered in 2004.
1998-2000 With Brian Jones and Erich Bender, Lockheed Tactical Aircraft Systems, Ft. Worth, on Sandia's Shared Vision program, ported Lockheed's production Computational Fluid Dynamics code, written in Fortran using MPI, to Sandia's parallel compute clusters; obtained scaling and speed-up data; helped test and debug operating system software on parallel compute clusters using this code; report in progress.

With Rich Pryor, modified his genetic algorithms computer code, written in C, for use on Sandia's parallel compute cluster; with John Feddema, wrote controlling program to implement the resulting algorithm on Sandia's RATLER all-terrain mobile robotic vehicles; field tested robotic vehicles with genetic algorithm controlling program; developed and wrote visualization software using Mathematica; documented in SAND2000-2846.

With George Reis, retired, revised and improved Sandia's internal ballistics code ONEGUN; report in progress.
1996-1998 With Curt Ober, developed techniques for applying parallel overset grid methods to climate and aerospace applications; documented in SAND98-0701. Awarded patent #6,356,860.

With LDRD funding, worked on developing a theory for coupling computational flow solvers with grid generation techniques so that the grid is generated simultaneously with the flow solver with very little user interaction required; documented in SAND97-2382. Awarded patent #6,519,553.
1993-1996 Oceanography and aerospace applications and code development for massively parallel and cluster parallel computers; part of work documented in SAND99-2780C.
1993 Applied and developed porous media flow codes for applications on parallel computers. With Julie Swisshelm, worked in area of ocean basin modeling and oil spill modeling, with goal of implementing current/updated models on parallel computers; work documented in SAND93-2871.
1991-1993 Continued work in area of computing the flow around spinning bodies, including finned reentry vehicles and wind turbines.

 Performed aerodynamic analyses on missile configurations, including an earth penetrator and the Multiple Launch Rocket System.
1990-1991 Worked with EAGLE surface and grid generation codes; wrote EAGLET, an EAGLE post-processing code that allows the user to extensively manipulate and prepare grids for other codes.

Worked with F3D Navier-Stokes code using multiblock grids generated by EAGLE and post-processed by the PEGSUS block-to-block interpolation code; and used TECPLOT for graphics.

Worked on spinning finned/non-finned reentry vehicles, flat-nose cone-cylinders, and two-dimensional rigid parachute shapes using Navier-Stokes flow field codes and grid generation.

Worked with Al Hodapp on cables in tow; documented in SAND91-0878C.
1988-1990 Began study of the different sublayer models in the Parabolized Navier-Stokes code used at Sandia. Implemented an improved sublayer model and global iteration in the code. 

Utilized thin-layer Navier-Stokes codes to generate solutions over flight vehicles with large separation regions, both as continuation and stand-alone codes. 

Analyzed several grid generation codes obtained from various sources to determine which codes will be of most use to Sandia-related projects.
1987 Documented improved version of a code which calculates the dynamic response of vehicles subjected to blast waves. Derived analytical test cases to compare with computational results for code verification. With John Yio and Robert Isidoro, implemented this version of the code on the Test Data Reduction Division's Data General computer.
1986-1988 With Mary Walker, worked on improving the parabolized Navier-Stokes (PNS) code used at Sandia. This work focused on stability of smoothing terms, the turbulence model, and the wall boundary conditions; documented in SAND87-2077J, SAND88-2424A, and SAND88-2425A.

Also worked on improved six-degree-of-freedom code for vehicles subjected to blast waves, as an extension of previous work.
1983-1985 Together with Glen Whiting and John Andersen, both from Sandia, was involved in the preliminary design phase of two bombs; documented in SAND85-0797.

With John Kraabel, Sandia Livermore, have analyzed blast effects on the trajectories of reentry vehicles using explosively-driven shock tubes, wrote a six-degree-of-freedom computer code to take measured pressures from the vehicle subjected to the blast and calculate its trajectory; documented in SAND report.
1981-1983 Attended Stanford University after working part-time on doctoral degree at Sandia Labs. Together with Prof. Joseph Steger, arrived at an iterative method of computing flow fields using the parabolized Navier-Stokes equations which render the equations less susceptible to instabilities induced by refining the computational grid. Wrote dissertation.
1981 Together with Dwayne Bennett of Sandia, performed a Monte Carlo dispersion analysis for the B61 bomb. Analysis indicated that the bomb was well within the requirements specified by the military; documented in SAND81-1896.
1979-80 Together with Charles Karnes of Sandia Labs, wrote a trajectory code for analyzing the dynamics of non-rigid vehicles. Application for the code involved an 80-ft seabed corer dropped from a height of 200 ft off the ocean floor; documented in SAND81-0267J.
1977-1978 Together with Ron Greene, et al. from Sandia Labs, extensively analyzed wind tunnel data on the ERB (Extended Range Bomb) and Tiger II missiles. Examined the effects of free-floating rollerons on the rolling moments of Tiger II; documented in SAND report.