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Ann S. Almgren

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Ann S. Almgren
Group Lead/ Senior Scientist
Phone: +1 510 486 5758
Mobile: +1 510 486 6900

Ann Almgren is a senior scientist and the Group Lead of the Center for Computational Sciences and Engineering in the Applied Math Department. Her primary research interest is in computational algorithms for solving PDE’s for fluid dynamics in a variety of application areas. Her current projects include the development and implementation of new multiphysics algorithms in high-resolution adaptive mesh codes that are designed for the latest multicore architectures.  She is a SIAM Fellow and serves on the editorial boards of CAMCoS and SIREV.  Prior to coming to LBL she worked at the Institute for Advanced Study in Princeton, NJ, and at Lawrence LIvermore National Lab.

Research Interests

  • Low Mach number modeling of Type Ia Supernovae (see MAESTRO)
  • Development of an adaptive-grid Eulerian solver for compressible astrophysical flows (see CASTRO)
  • Development of a new N-body hydro cosmology code (see NYX)
  • And more generally, adaptive projection methods for incompressible and low Mach number flows (see IAMR)

» Visit Ann Almgren's personal web page.

» Visit Ann Almgren's Google Scholar Entry

Journal Articles

Weiqun Zhang, Ann Almgren, Marcus Day, Tan Nguyen, John Shalf, Didem Unat, "BoxLib with Tiling: An AMR Software Framework", SIAM Journal on Scientific Computing, 2016,

Zarija Lukić, Casey Stark, Peter Nugent, Martin White, Avery Meiksin, Ann Almgren, "The Lyman α forest in optically thin hydrodynamical simulations", Monthly Notices of the Royal Astronomical Society, 2015, 446:3697,

M. Zingale, C. M. Malone, A. Nonaka, A. S. Almgren, and J. B. Bell, "Comparisons of Two- and Three-Dimensional Convection in Type I X-ray Bursts", submitted for publication, 2015,

Max Duarte, Ann Almgren, John Bell, "A Low Mach Number Model for Moist Atmospheric Flows", Journal of Atmospheric Sciences, to appear, 2015,

Anshu Dubey, Ann Almgren, John Bell, Martin Berzins, Steve Brandt, Greg Bryan, Phillip Colella, Daniel Graves, Michael Lijewski, Frank L\ offler, others, "A survey of high level frameworks in block-structured adaptive mesh refinement packages", Journal of Parallel and Distributed Computing, 2014, 74:3217--3227, doi: 10.1016/j.jpdc.2014.07.001

Max Duarte, Ann S Almgren, Kaushik Balakrishnan, John B. Bell, David M. Romps, "A Numerical Study of Methods for Moist Atmospheric Flows: Compressible Equations", Monthly Weather Review, 2014, 142:4269-4283,

W. Schmidt, J. Schulz, L. Iapichino, A.S. Almgren,, "Influence of adaptive mesh refinement and the hydro solver on shear-induced mass stripping in a minor merger scenario,", Astronomy and Computing, 2014,

H. Braun, W. Schmidt, J.C. Niemeyer, and A.S. Almgren, "Large-eddy simulations of isolated disk galaxies with thermal and turbulent feedback", Monthly Notices of the Royal Astronomical Society, January 2014, 442:3407-3426,

C. M. Malone, M. Zingale, A. Nonaka, A. S. Almgren, and J. B. Bell, "Multidimensional Modeling of Type I X-ray Bursts. II. Two-Dimensional Convection in a Mixed H/He Accretor", Astrophysical Journal, 2014, 788:115,

W. Schmidt, A.S. Almgren, H. Braun, J.F. Engels, J.C. Niemeyer, R.R. Mekuria, A.J. Aspden, J.B. Bell, "Cosmological Fluid Mechanics with Adaptively Refined Large Eddy Simulations", Monthly Notices of the Royal Astronomical Society, 2014, 440:3051-3077,

C. M. Malone, A. Nonaka, S. E. Woosley, A. S. Almgren, J. B. Bell, S. Dong, and M. Zingale, "The Deflagration Stage of Chandrasekhar Mass Models for Type Ia Supernovae: I. Early Evolution", Astrophysical Journal, 2014, 782:11,

Ke-Jung Chen, Alexander Heger, Stan Woosley, Ann Almgren, and Daniel Whalen, "Pair Instability Supernovae of Very Massive Population III Stars", Astrophysical Journal, January 2014, 792:44,

Ke-Jung Chen, Alexander Heger, S.E. Woosley, Ann S. Almgren, and Daniel J. Whalen, "Two-Dimensional Simulations of Pulsational Pair-Instability Supernova", Astrophysical Journal, 2014, 792:28,

Ke-Jung Chen, Alexander Heger, S.E. Woosley, Ann Almgren, and Daniel J. Whalen, and Jarrett L. Johnson, "The General Relativitistic Instability Supernova of a Supermassive Population III Star", Astrophysical Journal, 2014, 790:162,

A. S. Almgren, J. B. Bell, M.J. Lijewski, Z. Lukić, E. Van Andel, "Nyx: A Massively Parallel AMR Code for Computational Cosmology", The Astrophysical Journal, 2013, 765:39,

A.S. Almgren, A.J. Aspden, J. B. Bell, and M. L. Minion, "On the Use of Higher-Order Projection Methods for Incompressible Turbulent Flow", SIAM J. Sci. Comput., 2013, 35(1):B35-B42,

Weiqun Zhang, L. Howell, A. Almgren, A. Burrows, J. Dolence, and J. Bell., "CASTRO: A New Compressible Astrophysical Solver. III. Multigroup Radiation Hydrodynamics", Astrophysical Journal Supplement Series, 2013, 204:7,

M. Zingale, A. Nonaka, A. S. Almgren, J. B. Bell, C. Malone, and R. Orvedahl, "Low Mach Number Modeling of Convection in Helium Shells on Sub-Chandrasekhar White Dwarfs. I. Methodology", Astrophysical Journal, 2013, 764:97,

Haitao Ma, Stan Woosley, Chris Malone, Ann Almgren, and J.B. Bell, "Carbon Deflagration in Type Ia Supernovae: I. Centrally Ignited Models", Astrophysical Journal, 2013, 771:58,

C. Gilet, A.S. Almgren, J.B. Bell, A. Nonaka, S.E. Woosley and M. Zingale, "Low-Mach Number Modeling of Core Convection in Massive Stars", Astrophysical Journal, 2013, 773:137,

K. Chen, A. Heger, S. Woosley, A. Almgren, and W. Zhang, "The Most Powerful Stellar Explosion", Bulletin of the American Physical Society, 2013, 58(4),

Ke-Jung Chen, Alexander Heger, and Ann S. Almgren, "Numerical Approaches for Multidimensional Simulations of Stellar Explosions", Astronomy and Computing, January 2013, 3-4:70-78,

J. Nordhaus, T.D. Brandt, A. Burrows, A. Almgren, "The Hydrodynamic Origin of Neutron Star Kicks", Monthly Notices of the Royal Astronomical Society, 2012, 423:2,

A. Nonaka, J. B. Bell, M. S. Day, C. Gilet, A. S. Almgren, and M. L. Minion, "A Deferred Correction Coupling Strategy for Low Mach Number Flow with Complex Chemistry", Combustion Theory and Modelling, 2012, 16(6):1053-1088,

A. Nonaka, A. J. Aspden, M. Zingale, A. S. Almgren, J. B. Bell, and S. E. Woosley, "High-Resolution Simulations of Convection Preceding Ignition in Type Ia Supernovae Using Adaptive Mesh Refinement", Astrophysical Journal, 745, 73, 2012,

R. Tiron, A.S. Almgren, R. Camassa, "Shear Instability of Internal Solitary Waves in Euler Fluids with Thin Pycnoclines", Journal of Fluid Mechanics, 2012, 710:324-361,

G. S. H. Pau, J. B. Bell, A. S. Almgren, K. M. Fagnan and M. J. Lijewski, "An Adaptive Mesh Refinement Algorithm for Compressible Two-Phase Flow In Porous Media", Computational Geosciences, 2012, 16:577-592,

C. M. Malone, A. Nonaka, A. S. Almgren, J. B. Bell, and M. Zingale, "Multidimensional Modeling of Type I X-ray Bursts. I. Two-Dimensional Convection Prior to the Outburst of a pure 4He Accretor", Astrophysical Journal, 728, 118, February 2011,

  • Download File: xrb.pdf (pdf: 6.6 MB)

W. Zhang, L. Howell, A. Almgren, A. Burrows, and J. Bell, "CASTRO: A New Compressible Astrophysical Solver. II. Gray Radiation Hydrodynamics", Astrophysical Journal Supplement Series, 2011, 196:20,

M. Zingale, A. Nonaka, A. S. Almgren, J. B. Bell, C. M. Malone, and S. E. Woosley, "The Convective Phase Preceding Type Ia Supernovae", Astrophysical Journal, 740, 8, 2011,

A. Nonaka, S. May, A. S. Almgren, and J. B. Bell, "A Three-Dimensional, Unsplit Godunov Method for Scalar Conservation Laws", SIAM J. Sci. Comput., vol. 33, no. 4, 2011,

S. May, A. Nonaka, A. S. Almgren, and J. B. Bell, "An Unsplit, Higher-Order Godunov Method Using Quadratic Reconstruction for Advection in Two Dimensions", Comm. App. Math. and Comp. Sci., vol. 6, no. 1, 2011,

Ke-Jung Chen, Alexander Heger, and Ann Almgren, "Multi-Dimensional Simulations of Pair-Instability Supernovae", Computer Physics Communications, 182:1, 254-256, January 2011,

Emmanouela Rantsiou, Adam Burrows, Jason Nordhaus, Ann Almgren, "Induced Rotation in Three-Dimensional Simulations of Core-Collapse Supernovae: Implications for Pulsar Spins", Astrophysical Journal, 732, 57, 2011,

C. C. Joggerst, A. Almgren, and S. E. Woosley, "Three-Dimensional Simulations of Rayleigh-Taylor Mixing in Core Collapse Supernovae with CASTRO", Astrophysical Journal, 723, 353, October 2010,

J. Nordhaus, A. Burrows, A. Almgren, and J. Bell, "Dimension as a Key to the Neutrino Mechanism of Core-Collapse Supernova Explosions", Astrophysical Journal, 720, 694, September 2010,

A. Nonaka, A.S. Almgren, J. B. Bell, M. J. Lijewski, C. M. Malone, and M. Zingale, "MAESTRO: An Adaptive Low Mach Number Hydrodynamics Algorithm for Stellar Flows", Astrophysical Journal Supplement Series, 188, 358-383, June 2010,

A. S. Almgren, V.E. Beckner, J.B. Bell, M.S. Day, L.H. Howell, C.C. Joggerst, M.J. Lijewski, A. Nonaka, M. Singer, M. Zingale, "CASTRO: A New Compressible Astrophysical Solver. I. Hydrodynamics and Self-Gravity", Astrophysical Journal, 715, 1221-1238, June 2010,

G. S. H. Pau, J. B. Bell, K. Pruess, A. S. Almgren, M. J. Lijewski, K. Zhang, "High Resolution Simulation and Characterization of Density-Driven Flow in CO2 Storage in Saline Aquifers", Advances in Water Resources, 33(4):443-455, 2010,

C. C. Joggerst, A. Almgren, J. Bell, Alexander Heger, Daniel Whalen, and S. E. Woosley, "Primordial Core-Collapse Supernovae and the Chemical Abundances of Metal-Poor Stars", Astrophysical Journal, 709, 11-26, January 2010,

S.E. Woosley, A.S. Almgren, A.J. Aspden, J.B. Bell, D. Kasen, A.R. Kerstein, H. Ma, A. Nonaka and M. Zingale, "Type Ia Supernovae: Advances in Large Scale Simulation", SciDAC 2009, J. of Physics: Conference Series, 180, July 2009,

M. Zingale, A. S. Almgren, J. B. Bell, A. Nonaka, and S. E. Woosley, "Low Mach Number Modeling of Type Ia Supernovae. IV. White Dwarf Convection", Astrophysical Journal, 704, 196-210, 2009,

A. S. Almgren, J. B. Bell, A. Nonaka, M. Zingale, "A New Low Mach Number Approach in Astrophysics", Computing in Science and Engineering, vol. 11, no. 2, pp. 24-33, March/April, 2009,

A. S. Almgren, J. B. Bell, A. Nonaka, and M. Zingale, "Low Mach Number Modeling of Type Ia Supernovae. III. Reactions", Astrophysical Journal, 684, 449-470, 2008, LBNL 58673,

J. Bell, M. Day, A. Almgren, M. Lijewski, C. Rendleman, R. Cheng, I. Shepherd, "Simulation of Lean Premixed Turbulent Combustion", SciDAC 2006, J. of Physics: Conference Series, (William Tang, Ed.), 46, 1-15, 2006, 2006, LBNL 63091,

M. Zingale, A.S. Almgren, J.B. Bell, M.S. Day, C.A. Rendleman, and S.E. Woosley, "New Approaches for Modeling Type Ia Supernovae", SciDAC 2006, J. of Physics: Conference Series, (William Tang, Ed.), 46, 385-392, 2006, LBNL 63087,

A. S. Almgren, J. B. Bell, C. A. Rendleman, and M. Zingale, "Low Mach Number Modeling of Type Ia Supernovae. II. Energy Evolution", Astrophysical Journal, 649, 927-938, 2006, LBNL 58673,

A. S. Almgren, J. B. Bell, C. A. Rendleman, and M. Zingale, "Low Mach Number Modeling of Type Ia Supernovae. I. Hydrodynamics", Astrophysical Journal, 637, 922-936.(revised), 2006, LBNL 58673,

J.B. Bell, M.S. Day, A.S. Almgren, M.J. Lijewski, and C.A. Rendleman, "A Parallel Adaptive Projection Method for Low Mach Number Flows", International Journal for Numerical Methods in Fluids, 40:209-216, 2002. Also Appears in Numerical Methods for Fluid Dynamics VII, Proceedings of the 7th International Conference on Numerical Methods for Fluid Dynamics (ICFD 2001), March 2001,

A.S. Almgren, "A New Look at the Pseudo-Incompressible Solution to Lamb's Problem of Hydrostatic Adjustment", J. Atmos. Sci., 57:7, pp. 995-998, April 2000,

David E. Stevens, John B. Bell, Ann S. Almgren, Vincent E. Beckner, and Charles A. Rendleman, "Small Scale Processes and Entrainment in a Stratocumulus Marine Boundry Layer", J. Atmos. Sci., 57:4, pp. 567-581, February 2000,

A.S. Almgren, J.B. Bell, and W.Y. Crutchfield, "Approximate Projection Methods: Part I. Inviscid Analysis", SIAM J. Sci. Comput., 22:4, pp. 1139-59, 2000, LBNL 43374,

Sussman, M.M., Almgren, A.S., Bell, J.B., Colella, P., Howell, L.H., Welcome, M., "An Adaptive Level Set Approach for Incompressible Two-Phase Flows", J. Comp. Phys. Vol.148, pp. 81-124, 1999, LBNL 40327,

Almgren, A.S., Bell, J.B., Colella, P., Howell, L.H., Welcome, M.L., "A Conservative Adaptive Projection Method for the Variable Density Incompressible Navier-Stokes Equations", J. Comp. Phys., 1998, 142:1-46, LBNL 39075,

Almgren, A.S., Bell, J.B., Colella, P., Marthaler, T., "A Cartesian Grid Projection Method for the Incompressible Euler Equations in Complex Geometries", SIAM J. Sci. Comp., 1997, 18(5):1289-1309,

E. Gerry Puckett, Ann S. Almgren, John B. Bell, Daniel L. Marcus, William J. Rider, "A Higher-Order Projection Method for Tracking Fluid Interfaces in Variable Density Incompressible Flows", J. Comp. Phys., 130, pp. 269-282, 1997,

Ann S. Almgren, John B. Bell, William G. Szymczak, "A Numerical Method for the Incompressible Navier-Stokes Equaions Based on an Approximate Projection", SIAM J. Sci Comput., 17:2, March 1996,

Almgren, A.S., Buttke, T., Colella, P., "A Fast Adaptive Vortex Method In Three Dimensions", J. Comp. Phys., Vol.113 No.2, pp. 177-200, 1994,

Conference Papers

Muhammad Nufail Farooqi, Didem Unat, Tan Nguyen, Weiqun Zhang, Ann Almgren and John Shalf, "Nonintrusive AMR Asynchrony for Communication Optimization", EURO-PAR 2017, August 30, 2017,

Cy Chan, John Bachan, Joseph Kenny, Jeremiah Wilke, Vincent Beckner, Ann Almgren, John Bell, "Topology-Aware Performance Optimization and Modeling of Adaptive Mesh Refinement Codes for Exascale", (BEST PAPER AWARD) COMHPC 2016 - SC16 Workshop on Communication Optimization in High Performance Computing, Salt Lake City, UT, November 18, 2016,

Best Paper Award

T. Nguyen, D. Unat, W. Zhang, A. Almgren, N. Farooqi, and J. Shalf, "Perilla: Metadata-based Optimizations of an Asynchronous Runtime for Adaptive Mesh Refinement", Proceedings of the International Conference on High Performance Computing, Networking, Storage and Analysis (SC16), November 17, 2016,

Didem Unat, Tan Nguyen, Weiqun Zhang, Muhammed Nufail Farooqi, Burak Bastem, George Michelogiannakis, Ann Almgren, John Shalf, "TiDA: High-Level Programming Abstractions for Data Locality Management", ISC 2016: International Supercomputing conference, June 2016,

Samuel Williams, Mike Lijewski, Ann Almgren, Brian Van Straalen, Erin Carson, Nicholas Knight, James Demmel, "s-step Krylov subspace methods as bottom solvers for geometric multigrid", Parallel and Distributed Processing Symposium, 2014 IEEE 28th International, January 2014, 1149--1158, doi: 10.1109/IPDPS.2014.119

S. Williams, D. Kalamkar, A. Singh, A. Deshpande, B. Van Straalen, M. Smelyanskiy, A. Almgren, P. Dubey, J. Shalf, L. Oliker, "Optimization of Geometric Multigrid for Emerging Multi- and Manycore Processors", Proceedings of the International Conference on High Performance Computing, Networking, Storage and Analysis (SC), November 2012, doi: 10.1109/SC.2012.85

A. Nonaka, A. S. Almgren, J. B. Bell, H. Ma, S. E. Woosley, and M. Zingale, "From Convection to Explosion: End-to-End Simulation of Type Ia Supernovae", Proceedings of SciDAC 2011, Denver, Colorado, July 2011,

A. Almgren, J. Bell, D. Kasen, M. Lijewski, A. Nonaka, P. Nugent, C. Rendleman, R. Thomas, and M. Zingale, "MAESTRO, CASTRO and SEDONA -- Petascale Codes for Astrophysical Applications", Proceedings of SciDAC 2010, Chattanooga, Tennessee, July 2010,

H. Ma, M. Zingale, S. E. Woosley, A. J. Aspden, J. B. Bell, A. S. Almgren, A. Nonaka, and S. Dong, "Type Ia Supernovae: Advances in Large Scale Simulation", Proceedings of SciDAC 2010, Chattanooga, Tennessee, July 2010,

Ke-Jung Chen, Alexander Heger, and Ann Almgren, "Two Dimensional Simulations of Pair-Instability Supernovae", Conference on The First Stars and Galaxies: Challenges for the Next Decade, Conference Proceedings, published by the American Institute of Physics, Austin, Texas, March 2010,

George S. H. Pau, John B. Bell, Karsten Pruess, Ann S. Almgren, Michael J. Lijewski, Keni Zhang, "Numerical Studies of Density-Driven Flow in CO2 Storage in Saline Aquifers", Proceedings of TOUGH Symposium, September 14-16 2009, Berkeley, California, USA, 2009,

George S. H. Pau, Ann S. Almgren, John B. Bell, Michael J. Lijewski, Eric Sonnenthal, Nic Spycher, Tianfu Xu, Guoxiang Zhang, "A Parallel Second-Order Adaptive Mesh Algorithm for Reactive Flow in Geochemical Systems", Proceedings of TOUGH Symposium, September 14-16 2009, Berkeley, California, USA, 2009,

M. Zingale, A. S. Almgren, J. B. Bell, C. M. Malone and A. Nonaka, "Astrophysical Applications of the MAESTRO Code", SciDAC 2008, J. of Physics: Conference Series, 125, Seattle Washington, July 2008,

A.S. Almgren, J.B. Bell, and M. Zingale, "MAESTRO: A Low Mach Number Steller Hydrodynamics Code", SciDAC 2007, J. of Physics: Conference Series, Boston, Massachusetts, July 2007,

S. E. Woosley, "Type Ia supernovae", Journal of Physics Conference Series, Boston, Massachusetts, January 2007, 012081, doi: 10.1088/1742-6596/78/1/012081

J.B. Bell, M.S. Day, A.S Almgren, R.K. Cheng, and I.G. Shepherd, "Numerical Simulation of Premixed Turbulent Methane Combustion", Proceedings of the Second MIT Conference on Computational Fluid and Solid Mechanics, June 17-20, 2003,

J.B. Bell, M.S. Day, A.S. Almgren, M.J. Lijewski, and C.A. Rendleman, "Adaptive Numerical Simulation of Turbulent Premixed Combustion", Proceedings of the First MIT Conference on Computational Fluid and Solid Mechanics, June 11-15, 2001,

N. Botta, R. Klein, and A. Almgren, "Multiple Scales Analysis of Atmospheric Motions: Impact on Modeling and Computation", Proceedings of the ENUMATH99 Conference, July 1999,

R. Klein, N. Botta, and A. Almgren, "Asymptotic Analysis of a Dry Atmosphere", Proceedings of the Workshop on Stochastic Climate Models, May 30-June 2, Chorin (Brandenburg), Germany, 1999,

Robert F. Almgren and Ann S. Almgren, "Phase Field Instabilities and Adaptive Mesh Refinement", Modern Methods for Modeling Microstructure in Materials, TMS/SIAM,1996 (Proceedings of TMS Meeting), Cleveland, OH, 1996,

Mark. M. Sussman, Ann S. Almgren, John B. Bell, Phillip Colella, Louis H. Howell, Michael Welcome, "An Adaptive Level Set Approach for Incompressible Two-Phase Flows", Proceedings of the ASME Fluids Engineering Summer Meeting: Forum on Advances in Numerical Modeling of Free Surface and Interface Fluid Dynamics, July 1996,

Pember, R.B., Almgren, A.S., Bell, J.B., Colella, P., Howell, L., Lai, M., "A Higher-Order Projection Method for the Simulation of Unsteady Turbulent Nonpremixed Combustion in an Industrial Burner", Proceedings of the 8th International Symposium on Transport Phenomena in Combustion, San Francisco, CA, July 1995,

Almgren, A.S., Bell, J.B., Colella, P., Marthaler, T., "A Cell-Centered Cartesian Grid Projection Method for the Incompressible Euler Equations in Complex Geometries", AIAA paper 95-1924, Proceedings, AIAA 12th Computational Fluid Dynamics Conference, San Diego, CA, June 1995,

Ann S. Almgren, John B. Bell, Phillip Colella, Louis H. Howell, Michael Welcome, "A High-Resolution Adaptive Projection Method for Regional Atmospheric Modeling", Proceedings of the NGEMCOM Conference sponsored by the U.S. EPA, August 7-9, Bay City, MI, 1995,

Richard B. Pember, Ann S. Almgren, John B. Bell, Phillip Colella, Louis Howell, and Mindy Lai, "A Higher-Order Projection Method for the Simulation of Unsteady Turbulent Nonpremixed Combustion in an Industrial Burner", Proceedings of the 8th International Symposium on Transport Phenomena in Combustion, July 16-20, San Francisco, CA, 1995,

R.B. Pember, A.S. Almgren, W.Y. Crutchfield, L.H. Howell, J.B. Bell, P. Colella, and V.E. Beckner, "An Embedded Boundry Method for the Modeling of Unsteady Combustion in an Industrial Gas-Fired Furnace", WSS/CI 95F-165, 1995 Fall Meeting of the Western united States Section of the Comustion Institute, Stanford University, October 30-31, 1995,

Ann S. Almgren, John B. Bell, Louis H. Howell and Phillip Colella, "An Adaptive Projection Method for the Incompressible Navier-Stokes Equations", Proceedings of the 14th IMACS World Congress, July 11-15, pp. 537-540, Atlanta, Georgia, 1994,

Almgren, A.S., Bell, J.B., Colella, P., Howell, L.H., "An Adaptive Projection Method for the Incompressible Euler Equations", Proceedings of the AIAA 11th Computational Fluid Dynamics Conference, Orlando, FL, July 1993,

Ann S. Almgren, John B. Bell,Phillip Colella, Louis H. Howell, "An Adaptive Projection Method for the Incompressible Euler Equations", Proceedings of the AIAA 11th Computational Fluid Dynamics Conference, July 6-9, Orlando, FL, 1993,

Book Chapters

Ann Almgren, John Bell, Andy Nonaka and Michael Zingale, "Low Mach Number Modeling of Stratified Flows", Finite Volumes for Complex Applications VII -- Methods and Theoretical Apsects, Springer Proceedings in Mathematics and Statistics, edited by J. Fuhrmann, M. Ohlberger, C. Rohde, ( 2014)

Reports

S. Habib, R. Roser, R. Gerber, K. Antypas, K. Riley, T. Williams, J. Wells, T. Straatsma, A. Almgren, J. Amundson, S. Bailey, D. Bard, K. Bloom, B. Bockelman, A. Borgland, J. Borrill, R. Boughezal, R. Brower, B. Cowan, H. Finkel, N. Frontiere, S. Fuess, L. Ge, N. Gnedin, S. Gottlieb, O. Gutsche, T. Han, K. Heitmann, S. Hoeche, K. Ko, O. Kononenko, T. LeCompte, Z. Li, Z. Lukic, W. Mori, P. Nugent, C.-K. Ng, G. Oleynik, B. O'Shea, N. Padmanabhan, D. Petravick, F.J. Petriello, J. Power, J. Qiang, L. Reina, T.J. Rizzo, R. Ryne, M. Schram, P. Spentzouris, D. Toussaint, J.-L. Vay, B. Viren, F. Wurthwein, L. Xiao, "ASCR/HEP Exascale Requirements Review Report", arXiv:1603.09303, 2016,

Samuel Williams, Dhiraj D. Kalamkar, Amik Singh, Anand M. Deshpande, Brian Van Straalen, Mikhail Smelyanskiy,
Ann Almgren, Pradeep Dubey, John Shalf, Leonid Oliker,
"Implementation and Optimization of miniGMG - a Compact Geometric Multigrid Benchmark", December 2012, LBNL 6676E,

G. S. H. Pau, A. S. Almgren, J. B. Bell, and M. J. Lijewski, "A Parallel Second-Order Adaptive Mesh Algorithm for Incompressible Flow in Porous Media", Phil. Trans. R. Soc. A 367, 4633-4654, 200, 2009, LBNL 176E,

Sarah A. Williams, Ann S. Almgren, and E. Gerry Puckett, "On Using a Fast Multipole Method-based Poisson Solver in an Approximate Projection Method", March 2006, LBNL 59934,

  • Download File: FMM.pdf (pdf: 224 KB)

D.S. Nolan, A.S. Almgren, and J.B. Bell, "Studies of the Relationship Between Environmental Forcing and the Structure and Dynamics oof Tornado-Like Vortices", September 2000, LBNL 47554,

N. Botta, R. Klein, and A. Almgren, "Dry Atmosphere Asymptotics", PIK (Potsdam Institute for Climate Impact Research) Report, September 1999,

D.S. Nolan, A.S. Almgren, and J.B. Bell, "High Reynolds Number Simulations of Axisymmetric Tornado-Like Vortices with Adaptive Mesh Refinement", 1999, LBNL 42860,

Sussman, M.M., Almgren, A.S., Bell, J.B., Colella, P., Howell, L.H., Welcome, M., "An Adaptive Level Set Approach for Incompressible Two-Phase Flows", April 1997, LBNL 40327,

R.B. Pember, P. Colella, L.H. Howell, A.S. Almgren, J.B. Bell, W.Y. Crutchfield, V.E. Beckner, K.C. Kaufman, W.A. Fiveland, and J.P. Jessee, "The Modeling of a Laboratory Natural Gas-Fired Furnace with a Higher-Order Projection Method for Unsteady Combustion", UCRL-JC123244, February 1996,

Thesis/Dissertations

A Fast Adaptive Vortex Method Using Local Corrections, Almgren, A.S., 1991,