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Jonathan David Pietarila Graham

Jonathan Pietarila Graham

Phone (505) 665-2482


  • Computational Physics and Applied Mathematics
  • Numerical modeling
  • Computational fluid dynamics (CFD)
  • Direct numerical simulations of fluid turbulence
  • Computational fluid dynamics applications in astrophysics
  • Lagrangian-Averaged Navier Stokes (LANS-alpha) closures
  • Applied Math
  • Direct Numerical Simulations (DNS)
  • Computer and Computational Sciences
  • High performance computing
  • Earth and Space Sciences
  • Solar and heliospheric physics
  • High Energy Density Plasmas and Fluids
  • Computational fluid dynamics (CFD)
  • Direct numerical simulations
  • Earth and Space Sciences
  • Inverse modeling
  • Oil and gas reservoir simulations


Computational scientist with a background in solar astrophysics, hydrodynamic and magnetohydrodynamic turbulence, large eddy simulations, and geophysics.


Released codes

  1. Conversion of MPI Lagrangian hydrodynamics code into Legion (task-based parallelism):

Legion SPMD implementation of Pennant proxy application


University of Colorado, Applied Mathematics Department, Boulder, CO USA

Ph.D. in Applied Mathematics, 2007
Masters of Science in Applied Mathematics, 2005

Oklahoma State University, Department of Physics, Stillwater, OK USA

Bachelor of Science in Physics with Honors, 1993

LANL Positions

Applied Computer Science (CCS-7) Scientist, 2016 -

Solid Mechanics and Fluid Dynamics (T-3) & Center for Nonlinear Studies (CNLS) CNLS Postdoctoral Research Associate, 2011 - 2012


Professional Societies

Society for Industrial and Applied Mathematics (SIAM)



1. A framework for the evaluation of turbulence closures used in mesoscale ocean large-eddy simulations; Graham, Jonathan Pietarila; Ringler, Todd; Ocean Modelling Volume: 65 Pages: 25-39 (2013) DOI: 10.1016/j.ocemod.2013.01.004 webofknowledge arXiv:1207.5852 ADS

2. Instrumental and Observational Artifacts in Quiet Sun Magnetic Flux Cancellation Functions; Pietarila, A.; Graham, J. Pietarila; Solar Physics Volume: 282 Issue: 2 Pages: 389-404 (2013) DOI: 10.1007/s11207-012-0140-4 webofknowledge       

3. Not much helicity is needed to drive large-scale dynamos; Graham, Jonathan Pietarila; Blackman, Eric G.; Mininni, Pablo D.; Pouquet, A.; Physical Review E Volume: 85 Issue: 6 Pages: 066406 (2012) DOI: 10.1103/PhysRevE.85.066406 webofknowledge arXiv:1108.3039 ADS

4. High Reynolds number magnetohydrodynamic turbulence using a Lagrangian model; Graham, J. Pietarila; Mininni, P. D.; Pouquet, A.; Physical Review E Volume: 84 Issue: 1 Pages: 016314 (2011) DOI: 10.1103/PhysRevE.84.016314 webofknowledge arXiv:1102.5581 ADS

5. The Effect of Subfilter-Scale Physics on Regularization Models; Graham, Jonathan Pietarila; Holm, Darryl D.; Mininni, Pablo; Pouquet, A.; Journal of Scientific Computing Volume: 49 Issue: 1 Pages: 21-34 (2011) DOI: 10.1007/s10915-010-9428-4 webofknowledge arXiv:1003.0335 ADS

6. Universality of the small-scale dynamo mechanism; Moll, R.; Graham, J. Pietarila; Pratt, J.; Cameron, R.H., Müller, W.-C.; Schüssler, M.; Astrophysical Journal Volume: 736 Issue: 1 Pages: 36 (2011) DOI: 10.1088/0004-637X/736/1/36 webofknowledge arXiv:1105.0546 ADS

7. Turbulent small-scale dynamo action in solar surface simulations; Graham, JP; Cameron, R; Schüssler, M; Astrophysical Journal Volume: 714 Issue: 2 Pages: 1606-1616 (2010) DOI: 10.1088/0004-637X/714/2/1606 webofknowledge arXiv:1002.2750 ADS

8. Lagrangian-averaged model for magnetohydrodynamic turbulence and the absence of bottlenecks; Graham, JP; Mininni, PD; Pouquet, A; Physical Review E Volume: 80 Issue: 1 Pages: 016313 (2009) DOI: 10.1103/PhysRevE.80.016313 webofknowledge arXiv:0806.2054 ADS

9. The Small-Scale Solar Surface Dynamo (Keynote); Graham, J.P.; Danilovic, S.; Schüssler, M.; Second Hinode Science Meeting: Beyond Discovery-Toward Understanding Volume: 415 Pages: 43-50 (2009) ISBN: 978-1-58381-710-0 webofknowledge arXiv:1003.0347 ADS

10. Turbulent magnetic fields in the quiet sun: implications of Hinode observations and small-scale dynamo simulations; Graham, JP; Danilovic, S; Schüssler, M; Astrophysical Journal Volume: 693 Issue: 2 Pages: 1728-1735 (2009) DOI: 10.1088/0004-637X/693/2/1728 webofknowledge arXiv:0812.2125 ADS

11. Three regularization models of the Navier-Stokes equations; Graham, JP; Holm, DD; Mininni, PD; Pouquet, A.; Physics of Fluids Volume: 20 Issue: 3 Pages: 035107 (2008) DOI: 10.1063/1.2880275 webofknowledge arXiv:0709.0208 ADS

12. Highly turbulent solutions of the Lagrangian-averaged Navier-Stokes alpha model and their large-eddy-simulation potential; Graham, JP; Holm, DD; Mininni, PD; Pouquet, A.; Physical Review E Volume: 76 Issue: 5 Pages: 056310 (2007) DOI: 10.1103/PhysRevE.76.056310 webofknowledge  arXiv:0704.1928 ADS

13. Inertial range scaling, Kármán-Howarth theorem, and intermittency for forced and decaying Lagrangian averaged magnetohydrodynamic equations in two dimensions; Graham, JP; Holm, DD; Mininni, P; Pouquet, A.; Physics of Fluids Volume: 18 Issue: 4 Pages: 045106 (2006) DOI: 10.1063/1.2194966 webofknowledge arXiv:physics/0508173 ADS

14. Spectral line selection for HMI: A comparison of FeI 6173 angstrom and NiI 6768 angstrom; Norton, AA; Graham, JP; Ulrich, RK; . Schou, J.; Tomczyk, S.; Liu, Y.; Lites, B.W.; López Ariste, A.; Bush, R.I.; Socas-Navarro, H.; P. H. Scherrer, P.H.; Solar Physics Volume: 239 Issue: 1-2 Pages: 69-91 (2006) DOI: 10.1007/s11207-006-0279-y webofknowledge arXiv:astro-ph/0608124 ADS

15. Cancellation exponent and multifractal structure in two-dimensional magnetohydrodynamics: Direct numerical simulations and Lagrangian averaged modeling; Graham, JP; Mininni, PD; Pouquet, A; Physical Review E Volume: 72 Issue: 4 Pages: 045301(R) (2005) DOI: 10.1103/PhysRevE.72.045301 webofknowledge arXiv:physics/0506088 ADS

16. Inference of solar magnetic field parameters from data with limited wavelength sampling; Graham, JD; López Ariste, A.; Socas-Navarro, H; Tomczyk, S.; Solar Physics Volume: 208 Issue: 2 Pages: 211-232 (2002)  DOI: 10.1023/A:1020577605073 webofknowledge ADS

17. Multistabilities in a thin layer semiconductor laser with an inclined external cavity; Protsenko, IE; Oraevsky, AN; Graham, JD; Bandy, D.K.; Laser Physics Volume: 6 Issue: 2 Pages: 380-387 (1996)  webofknowledge

18. Dynamics of a monovelocity-atomic-beam maser framed in a semiclassical model; Bandy, D.K.; Graham, J.D.; Jones, D.J.; Oraevsky, A.N.; Sarkisyan, T.; Physical Review A Volume: 50 Pages: 685-697 (1994) DOI: 10.1103/PhysRevA.50.685 webofknowledge ADS