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Robert Byron Lowrie

Robert Lowrie

Email
Phone (505) 667-2121

Capabilities

  • Computational Physics and Applied Mathematics
  • Coupled multi-physics simulations
  • Computational fluid dynamics (CFD)
  • Monte Carlo methods
  • High-energy multi-material compressible radiation hydrodynamics
  • Applied Math
  • Deterministic Transport
  • Weapons Science and Engineering
  • High energy density physics
  • Shock physics
  • Multi-physics codes

Expertise

  • Numerical Methods
  • Radiation Hydrodynamics
  • Shock Hydrodynamics
  • Radiation Transport
  • Software Development for High-Performance Computing

Education

  • 1996 Ph.D. University of Michigan, Aerospace Engineering and Scientific Computing
  • 1986 M.S. Ohio State University, Aerospace Engineering
  • 1984 B. S. Ohio State University, Aerospace Engineering
 

LANL Positions

  • 2012-Present Transport Methods Project Leader, Advanced Simulation & Computing Program (ASC)
  • 2010-2012 Thermal Hydraulics Focus Area Leader, Consortium for Advanced Simulation of Light Water Reactors (CASL)
  • 2004-2010 Hydrodynamics Project Leader, ASC
  • 2003-2004 Marmot Co-project Leader, ASC
  • 2002-2003 Software Components Co-project Leader, ASC
  • 1996-1997 Post-doctoral Researcher

Other Experience

  • 1986-1990, Aeronautical Engineer, McDonnell Aircraft Co., St. Louis 
 

Publications

  1. [1]  J.M. Ferguson, J.E. Morel, and R. Lowrie. The equilibrium-diffusion limit for radiation hydrodynamics. Journal of Quantitative Spectroscopy and Radiative Transfer, 202:176–186, 2017.

    [2]  S R Bolding, J Hansel, J D Edwards, J E Morel, and R B Lowrie. Second-Order Discretization in Space and Time for Radiation-Hydrodynamics. Journal of Computational Physics, 338:511–526, 2017.

    [3]  A. B. Wollaber, H. Park, R. B. Lowrie, R. M. Rauenzahn, and M. A. Cleveland. Multigroup Radiation Hydrodynamics with a High-Order Low-Order Method. Nuclear Science and Engineering, 185(1), January 2017.

    [4]  T.S. Haut, C. Ahrens, A. Jonko, R. Lowrie, and A. Till. A new multigroup method for cross-sections that vary rapidly in energy. Journal of Quantitative Spectroscopy and Radiative Transfer, 2016.

    [5]  J. M. Ferguson, J. E. Morel, and R. B. Lowrie. Nonrelativistic radiative shock solutions with grey Sn-transport. High Energy Density Physics, 23:95– 114, 2017.

    [6]  D. Lee, R. Lowrie, M. Petersen, T. Ringler, and M. Hecht. A high order characteristic discontinuous Galerkin scheme for advection on unstructured meshes. Journal of Computational Physics, 324:289–302, 2016.

    [7]  A B Wollaber, H Park, R B Lowrie, R M Rauenzahn, and M A Cleveland. Radiation-Hydrodynamics with a High-Order, Low-Order Method. Proceedings of the ANS Joint International Topical Meeting on Math and Computations + Supercomputing in Nuclear Applications, Nashville, TN, April 2015.

    [8]  M A Cleveland, A B Wollaber, R B Lowrie, K G Thompson, and G M Rockefeller. Momentum Deposition in Curvilinear Coordinates. Proceedings of the ANS Joint International Topical Meeting on Math and Computations + Supercomputing in Nuclear Applications, Nashville, TN, April 2015.

    [9]  T. S. Haut, R. B. Lowrie, H. Park, R. M. Rauenzahn, and A. B. Wollaber. A Linear Stability Analysis of the Multigroup High-Order Low-Order (HOLO) Method. Proceedings of the ANS Joint International Topical Meet- ing on Math and Computations + Supercomputing in Nuclear Applications, Nashville, TN, April 2015.

    [10] R B Lowrie and T S Haut. Reconstructing opacities for multigroup thermal radiative transport (u). Technical Report LA-UR-14-24608, Los Alamos National Laboratory, 2014. NECDC Conference.

    [11] H Park, D A Knoll, R M Rauenzahn, A B Wollaber, and R B Lowrie. Moment-Based Accleration of Monte Carlo Solution for Multifrequency Thermal Radiative Transfer Problems. Journal of Computational and Theoretical Transport, 2014.

    [12] R B Lowrie and A B Wollaber. Simple material-motion corrections for thermal radiative transport. Transport Theory and Statistical Physics, 2014. DOI:10.1080/00411450.2014.910232.

    [13] J. D. Edwards, J. E. Morel, and R. B. Lowrie. Second-order discretization in space and time for radiation hydrodynamics. Technical Report LA-UR-13-20583, Los Alamos National Laboratory, 2013. International Conference on Mathematics and Computational Methods Applied to Nuclear Science & Engineering, American Nuclear Society.

    [14] J. Bakosi, M. A. Christon, R. B. Lowrie, L. A. Pritchett-Sheats, and R. R. Nourgaliev. Nuclear Engineering and Design. Nuclear Engineering and De- sign, 262:544–561, September 2013.

    [15] T O Masser, J G Wohlbier, and R B Lowrie. Shock wave structure for a fully ionized plasma. Shock Waves, 21(4):367–381, 2011.

    [16] S Y Kadioglu, D A Knoll, R B Lowrie, and R M Rauenzahn. A second order self-consistent IMEX method for radiation hydrodynamics. Journal of Computational Physics, 229:8313–8332, 2010.

    [17] C D Hauck and R B Lowrie. Temporal regularization of the PN equations. SIAM Journal on Multiscale Modeling and Simuation, 7:1497–1524, 2009.

    [18] S P Schofield, M A Christon, V Dyadechko, R V Garimella, R B Lowrie, and B K Swartz. Multi-material incompressible flow simulation using the moment-of-fluid method. International journal for numerical methods in fluids, DOI: 10.1002/fld.2108, 2009.

    [19] J D Densmore, J S Warsa, and R B Lowrie. Stability analysis of a semi-implicit Fokker-Planck approximation for Compton scattering. Journal of Computational Physics, 228:5933–5960, 2009.

    [20] J D Densmore, J S Warsa, and R B Lowrie. Time-step limits for Monte Carlo Compton-scattering method. In Proceedings of the International Conference on Mathematics, Computational Methods & Reactor Physics (M&C 2009). American Nuclear Society, 2009.

    [21] R G McClarren and R B Lowrie. The effects of slope limiting on asymptotic preserving numerical methods for hyperbolic conservations laws. Journal of Computational Physics, 227:9711–9726, 2008.

    [22] R B Lowrie and J D Edwards. Radiative shock solutions with grey nonequilibrium diffusion. Shock Waves, 18(2):129–143, 2008.

    [23] M M Francois, R B Lowrie, and E Dendy. A material interface transition algorithm for multiphase flow. In Proceedings of FEDSM08 ASME Fluids Engineering Division Summer Conference Meeting, 2008.

    [24] R B Lowrie, J E Morel, and K G Budge. Discretization of Lagrangian Radiation Hydrodynamics. Technical Report CCS-2:08-63(U), Los Alamos National Laboratory, 2008.

    [25] R G McClarren and R B Lowrie. Manufactured solutions for the P1 radiation-hydrodynamics equations. Journal of Quantitative Spectroscopy and Radiative Transfer, 109:2590–2602, 2008.

    [26] R B Lowrie and J D Edwards. Shock wave solutions for radiation hydrodynamics. In Proceedings of the ANS Joint International Topical Meeting on Math and Computations + Supercomputing in Nuclear Applications, Monterey, CA. American Nuclear Society, 2007.

    [27] D A Knoll, R B Lowrie, and J E Morel. Numerical analysis of time integration errors for nonequilibrium radiation diffusion. Journal of Computational Physics, 226:1332–1347, 2007.

    [28] J Fung, M Francois, E Dendy, M Kenamond, and R Lowrie. Calculations of the Rayleigh-Taylor instability: RAGE and FLAG hydrocode comparisons. In Proceedings of the 2006 NECDC, 2006.

    [29] R B Lowrie and R M Rauenzahn. Radiative shock solutions in the equilibrium-diffusion limit. Shock Waves, 16(6):445–453, 2007.

    [30] R B Lowrie. A comparison of implicit time integration methods for nonlinear relaxation and diffusion. Journal of Computational Physics, 196(2):566– 590, 2004.

    [31] J E Morel, T A Wareing, R B Lowrie, and D K Parsons. Analysis of ray-effect mitigation techniques. Nuclear Science and Engineering, 144(1):1–22, May 2003.

    [32] R B Lowrie and J E Morel. Methods for hyperbolic systems with stiff relaxation. International journal for numerical methods in fluids, 40(3/4):413– 423, 2002.

    [33] W J Rider and R B Lowrie. The use of classical Lax-Friedrichs Riemann solvers with discontinuous Galerkin methods. International journal for numerical methods in fluids, 40:479–486, 2002.

    [34] R B Lowrie, D Mihalas, and J E Morel. Comoving-frame radiation transport for nonrelativistic fluid velocities. Journal of Quantitative Spectroscopy and Radiative Transfer, 69(3):291–304, 2001.

    [35] R B Lowrie and J E Morel. Issues with high-resolution Godunov methods for radiation hydrodynamics. Journal of Quantitative Spectroscopy and Radiative Transfer, 69(4):475–489, 2001.

    [36] J W Bates, D A Knoll, W J Rider, R B Lowrie, and V A Mousseau. On consistent time-integration methods for radiation hydrodynamics in the equilibrium diffusion limit: Low-energy-density regime. Journal of Compu- tational Physics, 167(1):99–130, 2001.

    [37] R B Lowrie and J E Morel. Discontinuous Galerkin for hyperbolic systems with stiff relaxation. In B Cockburn and G E Karniadakis, editors, Discontinuous Galerkin Methods: Theory, Computation and Applications, pages 385–390. Springer, 2000.

    [38] L H Auer and R B Lowrie. Dispersion analysis of radiation/thermal fronts with fully resolved spectral opacity variation. In Proceedings of the Nuclear Explosives Code Developers Conference, 2000.

    [39] R B Lowrie, J E Morel, and J A Hittinger. The coupling of radiation and hydrodynamics. Astrophysical Journal, 521(1):432–450, 1999.

    [40] R B Lowrie and J E Morel. Coupling issues for radiation hydrodynamics. In Proceedings of the Nuclear Explosives Code Developers Conference (also Los Alamos Report LA-UR-98-5332), 1998.

    [41] R B Lowrie, P L Roe, and B van Leer. Space-time methods for hyperbolic conservation laws. In Barriers and Challenges in Computational Fluid Dynamics, pages 79–98. Kluwer, 1998.

    [42] R B Lowrie, P L Roe, and B van Leer. Properties of space-time discontinuous Galerkin. Technical report, 1998.

    [43] R B Lowrie. Compact higher-order numerical methods for hyperbolic conservation laws. PhD thesis, University of Michigan, 1996.

    [44] R B Lowrie, P L Roe, and B van Leer. A space-time discontinuous Galerkin method for the time-accurate numerical solution of hyperbolic conservation laws. In Proceedings of the 12th AIAA Computational Fluid Dynamics Con- ference. AIAA, 1995.

    [45] R B Lowrie and P L Roe. On the numerical solution of conservation laws by minimizing residuals. Journal of Computational Physics, 113(2):304–308, 1994.

    [46] S Agrawal, S F Creasman, and R B Lowrie. Evaluation of Euler solvers for transonic wing-fuselage geometries. Journal of Aircraft, 28(12):885–891, 1991.

    [47] S Agrawal, R B Lowrie, and S F Creasman. An evaluation of Euler solers for transonic wing-fuselage geometries. In Proceedings of the AIAA 8th Applied Aerodynamics Conference, 1990.

    [48] S Agrawal, A Verhoff, R B Lowrie, and R E Vermeland. Euler transonic solutions over finite wings. In Proceedings of the AIAA 26th Aerospace Sciences Meeting, 1988.