Publications
 

Highlighted Publications


(Please check out Google Scholar or my ORCID page for a more complete and up-to-date list of publications.)


  1. J. Pratt, A. Busse, W.-C. Mueller (2022). Reynolds number dependence of Lagrangian dispersion in direct numerical simulations of anisotropic magnetohydrodynamic turbulence. Journal of Fluid Mechanics, 944, A36. doi:10.1017/jfm.2022.434
  2. J. Pratt, A. Busse, W.-C. Mueller "Lagrangian Statistics for Dispersion in Magnetohydrodynamic Turbulence'' Journal of Geophysical Research - Space Physics, special issue "Solar and Heliospheric Plasma Structures: Waves, Turbulence, and Dissipation" 125, e2020JA028245(2020).
  3. J. Pratt, A. Busse, W.-C. Mueller."Intermittency of many-particle dispersion in anisotropic magnetohydrodynamic turbulence" IOP conferencce proceedings, 19th Annual International Astrophysics Conference.
  4. J. Pratt, A. Busse, W.-C. Mueller"Lagrangian statistics of heat transfer in homogeneousturbulence driven by Boussinesq convection." Fluids, Special Issue: Lagrangian Transport in Geophysical Fluid Flows, Fluids 5.3 (2020): 127.
  5. J. Pratt, I. Baraffe, T. Goffrey, C. Geroux, T. Constantino, D. Folini, R. Walder. "Comparison of 2D and 3D compressible convection in a pre-main sequence star." Astronomy & Astrophysics 638 (2020): A15.
  6. M. V. Popov, R. Walder, D. Folini, T. Goffrey, I. Baraffe, T. Constantino, C. Geroux, J. Pratt, M. Viallet, and R. Kaeppeli."A well-balanced scheme for the simulation tool-kit A-MaZe : implementation, tests, and first applications to stellar structure.'' Astronomy and Astrophysics, 630 A129 (2019).
  7. I. Baraffe, J. Pratt, T. Goffrey, T. Constantino, D. Folini, M.V. Popov, R. Walder, M. Viallet. "Lithium depletion in solar-like stars: effect of overshooting based on realistic multi-dimensional simulations.'' ApJ Lett, 2017.
  8. J. Pratt, I. Baraffe, T. Goffrey, T. Constantino, M. Viallet, M.V. Popov, R. Walder, and D. Folini. "Extreme value statistics for two-dimensional convective penetration in a pre-Main Sequence star." Astronomy & Astrophysics, 604 A125, 2017.
  9. J. Pratt, A. Busse, W. -C. Mueller, S.C. Chapman, N.W. Watkins. Extreme-value statistics from Lagrangian convex hull analysis for homogeneous turbulent Boussinesq convection and MHD convection. New Journal of Physics, 19(6), 065006, 2017.
  10. J. Pratt, G.T.A Huismans, E. Westerhof. Early evolution of electron cyclotron driven current during suppression of tearing modes in a circular tokamak. Physics of Plasmas, 23(10), 102507, 2016.
  11. T. Goffrey, J. Pratt, M. Viallet, I. Baraffe, M. V. Popov, R. Walder, D. Folini, C. Geroux, T. Constantino. Benchmarking the Multi-dimensional Stellar Implicit Code MUSIC. Astronomy and Astrophysics, 2017.
  12. J.W. Haverkort, H.J. de Blank, G.T.A. Huysmans, J. Pratt, B. Koren. Implementation of the full viscoresistive magnetohydrodynamic equations in a nonlinear finite element code. Journal of Computational Physics, April 2016.
  13. J. Pratt, I. Baraffe, T. Goffrey, C. Geroux, M. Viallet, D. Folini, T. Constantino, M.V. Popov, R. Walder. Spherical-shell boundaries for two-dimensional compressible convection in a star. Astronomy and Astrophysics, 2016.
  14. E. Westerhof, H.J. de Blank, J. Pratt. New insights into the generalized Rutherford equation for nonlinear neoclassical tearing mode growth from 2D reduced MHD simulations. Volume 56, Number 3, Nuclear Fusion, February 2016.
  15. C. Geroux, I. Baraffe, M. Viallet, T. Goffrey, J. Pratt, T. Constantino, R. Walder, D. Folini, and M. V. Popov. Multi-dimensional structure of accreting young stars. Astronomy and Astrophysics, March 2016.
  16. M. Viallet, T. Goffrey, I. Baraffe, D. Folini, C. Geroux, M. V. Popov, J. Pratt, and R.Walder. A Jacobian-free Newton-Krylov method for time-implicit multidimensional hydrodynamics. Astronomy and Astrophysics, February 2016.
  17. J. Pratt, A. Busse, W.-C. Mueller. A Lagrangian Perspective on Anisotropy in Turbulent Flows. Forschung im HLRN-Verbund Dec. 2015 (Project Book of the Northern German Computing Alliance)
  18. J. Pratt, A. Busse, W.-C. Mueller, S.C. Chapman, N.W. Watkins. Anomalous dispersion of Lagrangian particles in local regions of turbulent flows revealed by convex hull analysis.
  19. E. Westerhof and J. Pratt. "Closure of the single fluid magnetohydrodynamic equations in presence of electron cyclotron current drive." Physics of Plasmas 21.10 (2014): 102516.
  20. J. Pratt, A. Busse, W.-C. Mueller. Fluctuation dynamo amplified by intermittent shear-bursts in convectively-driven magnetohydrodynamic turbulence. A&A 557 A76 (2013).
  21. R. Moll, J. Pietarila-Graham, J. Pratt, R.H. Cameron, W.-C. Mueller, and M. Schuessler. Universality of the Small-Scale Dynamo Mechanism. The Astrophysical Journal, 736(1), p36. July 2011.

Selected Recent Presentations of Note:




  1. J. Pratt. "The Physics of Stellar Interiors." Space Science and Security Summer Seminar Series at Lawrence Livermore National Laboratory. August 9 2022.https://doi.org/10.6084/m9.figshare.20564718.v1
  2. J. Pratt. "Magnetic Islands under the influence of heating and current" (invited talk) UKMHD Meeting 2017 at the University of Durham, 20 April 2017. https://doi.org/10.6084/m9.figshare.4906460.v1
  3. J. Pratt, et al. "MHD modeling of solar wind turbulence and convection in sunspots" AstroChat Astrophysics Seminar at the University of Glasgow, 5 November 2015.
  4. J. Pratt, A. Busse, W.-C. Mueller. "Lagrangian statistics of heat transfer in homogeneous hydrodynamic turbulence driven by Boussinesq convection" UK Turbulence Consortium Annual Meeting. 3-4 September 2015.
  5. J. Pratt and E. Westerhof. "Current evolution during suppression of tearing modes with ECCD." (invited talk) JOREK General Meeting. Garching, Germany, 27 May 2015. https://dx.doi.org/10.6084/m9.figshare.2750659.v1
  6. J. Pratt. "Time-implicit compressible simulations of deep convection in a young sun." Astrophysics Seminar, Georg-August-Universitaet oettingen, Germany, 5 Feb 2015.
  7. J. Pratt, et al. "Fluctuation dynamo amplified by intermittent shear bursts." (invited talk) Dynamics Days Europe, Mini-symposium on Nonlinear Problems in Plasma Astrophysics, 8-12 September 2014, Bayreuth, Germany https://dx.doi.org/10.6084/m9.figshare.2749897.v1
  8. J. Pratt, E. Westerhof. "Tutorial: Incorporating kinetic aspects of RF current drive in MHD simulation with a focus on ECCD stabilization of tearing modes." (invited talk) Lorentz Workshop: Modeling Kinetic Aspects of Global MHD Modes, Leiden, Netherlands, Dec 4 2013. https://dx.doi.org/10.6084/m9.figshare.2750392.v1
  9. J. Pratt, E. Westerhof. "Simulation of suppression of neoclassical tearing modes with ECCD." (contributed talk) 54th APS Division of Plasma Physics, November 1, 2012, Providence, Rhode Island.
  10. J. Pratt, W.-C. Mueller. "The Role of Magnetic Structures in Dynamo Action." (contributed talk) 53rd APS Division of Plasma Physics, 17 Nov 2011, Salt Lake City, Utah.
  11. J. Pratt, W.-C. Mueller. "Solar Dynamo Action: Lagrangian statistics and other characteristics of 3D MHD conveection." (invited talk) Institute for Fusion Studies VIP Seminar. University of Texas at Austin, Dec. 2010.
  12. J. Pratt, W. Horton, H.L. Berk "GAMMA-10 Simulation Results and Implications for a Tandem Mirror Effort." (invited talk) Fusion Power Associates Symposium, Lawrence Livermore National Laboratory. December 3-4, 2008.