Los Alamos National Laboratory
Profile Pages
Robert Byron Lowrie
Email
Phone (505) 6672121
Capabilities
 Computational Physics and Applied Mathematics
 Coupled multiphysics simulations
 Computational fluid dynamics (CFD)
 Monte Carlo methods
 Highenergy multimaterial compressible radiation hydrodynamics
 Applied Math
 Deterministic Transport
 Weapons Science and Engineering
 High energy density physics
 Shock physics
 Multiphysics codes
Expertise
 Numerical Methods
 Radiation Hydrodynamics
 Shock Hydrodynamics
 Radiation Transport
 Software Development for HighPerformance 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

 2018Present Integrated Codes Program Manager, Advanced Simulation & Computing Program (ASC)
 20122018 Transport Methods Project Leader, ASC
 20102012 Thermal Hydraulics Focus Area Leader, Consortium for Advanced Simulation of Light Water Reactors (CASL)
 20042010 Hydrodynamics Project Leader, ASC
 20032004 Marmot Coproject Leader, ASC
 20022003 Software Components Coproject Leader, ASC
 19961997 Postdoctoral Researcher
Other Experience
 19861990, Aeronautical Engineer, McDonnell Aircraft Co., St. Louis
Publications

[1] J.M. Ferguson, J.E. Morel, and R. Lowrie. The equilibriumdiffusion 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. SecondOrder Discretization in Space and Time for RadiationHydrodynamics. 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 HighOrder LowOrder 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 crosssections 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 Sntransport. 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. RadiationHydrodynamics with a HighOrder, LowOrder 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 HighOrder LowOrder (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 LAUR1424608, Los Alamos National Laboratory, 2014. NECDC Conference.
[11] H Park, D A Knoll, R M Rauenzahn, A B Wollaber, and R B Lowrie. MomentBased 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 materialmotion 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. Secondorder discretization in space and time for radiation hydrodynamics. Technical Report LAUR1320583, 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. PritchettSheats, 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 selfconsistent 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. Multimaterial incompressible flow simulation using the momentoffluid 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 semiimplicit FokkerPlanck approximation for Compton scattering. Journal of Computational Physics, 228:5933–5960, 2009.
[20] J D Densmore, J S Warsa, and R B Lowrie. Timestep limits for Monte Carlo Comptonscattering 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 CCS2:0863(U), Los Alamos National Laboratory, 2008.
[25] R G McClarren and R B Lowrie. Manufactured solutions for the P1 radiationhydrodynamics 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 RayleighTaylor 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 equilibriumdiffusion 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 rayeffect 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 LaxFriedrichs 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. Comovingframe 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 highresolution 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 timeintegration methods for radiation hydrodynamics in the equilibrium diffusion limit: Lowenergydensity 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 LAUR985332), 1998.
[41] R B Lowrie, P L Roe, and B van Leer. Spacetime 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 spacetime discontinuous Galerkin. Technical report, 1998.
[43] R B Lowrie. Compact higherorder numerical methods for hyperbolic conservation laws. PhD thesis, University of Michigan, 1996.
[44] R B Lowrie, P L Roe, and B van Leer. A spacetime discontinuous Galerkin method for the timeaccurate 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 wingfuselage 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 wingfuselage 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.