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Pencil Code school and 2025 user meeting

20–31 Oct 2025
CERN
Europe/Zurich timezone

TH workshop secretariat

Contribution List

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  1. 2. Welcome to Pencil Code school
    Alberto Roper Pol, Axel Brandenburg (Nordita)
    20/10/2025, 09:30

    Welcome to the school on Pencil Code!
    Introduction to the school. History and scientific summary of Pencil Code.

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  2. 3. Introduce yourself
    Alberto Roper Pol
    20/10/2025, 10:30

    Session to introduce yourself! We want to hear about your research interests, background and expectations from the school!

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  3. 4. Basics of Pencil Code
    Philippe Bourdin (University of Graz)
    20/10/2025, 11:30
  4. 5. Practice session. Getting familiar with the code
    Alberto Roper Pol
    20/10/2025, 15:00

    Installation and getting familiar with the code. Running your first sample(s).

    Go on into the Pencil Code website (https://pencil-code.nordita.org/), download the code and install libraries (you can see the quick starter guide attached here) and documentation available on Pencil Code's website.

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  5. 8. Practice session. Sound and Alfven waves
    Alberto Roper Pol, Antonino Salvino Midiri (Universite de Geneve (CH)), Deepen Garg (University of Bonn)
    20/10/2025, 16:30
  6. 9. Numerical schemes for differential equations
    Antonino Salvino Midiri (Universite de Geneve (CH)), Philippe Bourdin (University of Graz)
    21/10/2025, 09:30
  7. 31. Numerical schemes for differential equations
    Philippe Bourdin (University of Graz)
    21/10/2025, 11:30
  8. 11. Discrete Fourier transform. Power spectra
    Isak Stomberg (IFIC Instituto de Física Corpuscular)
    21/10/2025, 12:30
  9. 12. Post-processing and visualization
    Axel Brandenburg (Nordita), Philippe Bourdin (University of Graz)
    21/10/2025, 14:00
  10. 32. Post-processing and visualization
    Philippe Bourdin (University of Graz), Simon Candelaresi (University of Augsburg)
    21/10/2025, 16:00
  11. 13. Practice session. Forced helical turbulence
    Alberto Roper Pol, Antonino Salvino Midiri (Universite de Geneve (CH)), Deepen Garg (University of Bonn)
    21/10/2025, 16:30
  12. 10. Running on multiple CPUs. Parallelization
    Matthias Rheinhardt (Aalto University)
    22/10/2025, 09:30
  13. 7. Data handling and I/O approaches
    Philippe Bourdin (University of Graz)
    22/10/2025, 10:30
  14. 16. Contributing to the code. SVN and Github. Pencil Code autotests
    Alberto Roper Pol
    22/10/2025, 11:30
  15. 15. Accelerating Pencil Code on GPUs
    Matthias Rheinhardt (Aalto University)
    22/10/2025, 12:00
  16. 17. TH Colloquium: Dynamos versus magnetogenesis: astrophysics versus cosmology
    Axel Brandenburg (Nordita)
    22/10/2025, 14:00

    Magnetic fields occur spontaneously both in astrophysics and in the early universe. Their energy sources are rather different: kinetic energy of the plasma in astrophysics and a variety of other forms of energy including axions, scalar fields, and chiral fermions in the cosmological settings. However, both areas have in common that the magnetic field is amplified by a long wavelength...

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  17. 18. Free hands-on session. Projects definition
    Alberto Roper Pol
    22/10/2025, 16:00
  18. 19. Magnetohydrodynamics in the early Universe
    Alberto Roper Pol
    23/10/2025, 09:30
  19. 20. Primordial magnetic fields
    Alberto Roper Pol, Axel Brandenburg
    23/10/2025, 11:30
  20. 21. Chiral MHD
    Deepen Garg (University of Bonn)
    23/10/2025, 12:30
  21. 24. Gravitational waves
    Chiara Caprini (CERN)
    23/10/2025, 14:00
  22. 27. Inflation
    Ramkishor Sharma (University of Hyderabad)
    23/10/2025, 16:00
  23. 22. Practice session. Decaying MHD turbulence
    Alberto Roper Pol, Antonino Salvino Midiri (Universite de Geneve (CH)), Deepen Garg (University of Bonn)
    24/10/2025, 09:30
  24. 23. First-order phase transitions
    Antonino Salvino Midiri (Universite de Geneve (CH)), Isak Stomberg (IFIC Instituto de Física Corpuscular)
    24/10/2025, 11:30
  25. 25. Practice session. Gravitational waves
    Alberto Roper Pol
    24/10/2025, 14:00
  26. 26. CosmoGW
    Alberto Roper Pol
    24/10/2025, 15:00
  27. 28. Open practice session
    Alberto Roper Pol
    24/10/2025, 16:00
  28. 29. Concluding the school
    Alberto Roper Pol
    24/10/2025, 17:30
  29. 33. Introduction
    Alberto Roper Pol, Axel Brandenburg, Philippe-André Bourdin
    27/10/2025, 10:00

    Reports from steering committee (P. Bourdin), scientific usage of Pencil Code (A. Brandenburg), Pencil Code school (A. Roper Pol)

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  30. 34. Discussion session: coding sessions agenda setup
    Alberto Roper Pol
    27/10/2025, 11:30

    Discussion of relevant topics to be addressed during the week, preparation of the agenda and distribution of the coding sessions.

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  31. 35. Coding session: GPU accelerated code
    Matthias Rheinhardt
    27/10/2025, 14:00

    Checking samples running with GPUs. Stable versions and future applications.

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  32. 36. Coding session: Dark Matter applications
    Axel Brandenburg
    27/10/2025, 16:00

    Dark Matter and N-body simulations with expansion. PIC simulations.

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  33. 37. Diffusion and heat conduction in simulations of convection and solar atmosphere
    Philippe-André Bourdin
    28/10/2025, 10:00
  34. 43. Primordial magnetic field from chiral plasma instability with sourcing
    Murman Gurgenidze
    28/10/2025, 10:30
  35. 39. Discussion: documentation of Pencil Code
    Illa Rivero Losada
    28/10/2025, 11:30
  36. 40. Discussion: documentation (contd)
    Alberto Roper Pol
    28/10/2025, 14:00
  37. 41. Coding session: Python tools + MacOS tests + unique input file
    Alberto Roper Pol
    28/10/2025, 16:00

    Part 1: python visualization, unifying Jupyter notebooks, extending documentation, GW turbulence postprocessing in Python, pip installation of Python packages.

    Part 2: MacOS tests, docker.

    Part 3: unique input file, restructuring the run directory.

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  38. 42. The inverse magnetic cascade from radiation to matter domination
    Axel Brandenburg (Nordita)
    29/10/2025, 10:00
  39. 38. Using the Pencil Code to study Red giant stars
    Carolina Ortiz Rodríguez
    29/10/2025, 10:30
  40. 44. Discussion: distribution version control (Git and SVN), branches and breaking autotests
    29/10/2025, 11:30
  41. 45. Relativistic magnetohydrodynamics in the early Universe
    Antonino Salvino Midiri (Universite de Geneve (CH))
    29/10/2025, 15:30
  42. 46. Coding session: Relativistic hydrodynamics and high frequency problem
    Alberto Roper Pol
    29/10/2025, 16:15
  43. 47. Coding session: AI applications for sub-grid modeling of non-linear physics + missing slices in Dardel
    Matthias Rheinhardt
    29/10/2025, 17:30
  44. 54. Discussion session: output of relevant papers for developments of Pencil Code when compiling the code
    Axel Brandenburg (Nordita)
    30/10/2025, 10:00
  45. 50. Discussion: Minimizing data load of huge simulations
    Matthias Rheinhardt
    30/10/2025, 11:20
  46. 51. Discussion session: coding standards
    Philippe-André Bourdin
    30/10/2025, 11:50
  47. 52. Coding session: reheating simulations and issue on gaussian noise initial conditions + scalar-induced GWs
    30/10/2025, 14:00

    Reheating simulations and issue on gaussian noise initial conditions for the logarithm of density.
    Scalar-induced gravitational waves, studying scalar perturbations.

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  48. 53. Coding session: Special modules + Initialization from external file
    30/10/2025, 16:00

    Dealing with multiple special modules: rename special by the name, fix the input list, rename variables.
    Initialization of fields from an external file (e. g. with hdf5 external file).

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  49. 48. Axion-USR model
    Alireza Talebian Ashkezari
    31/10/2025, 10:00
  50. 55. Discussion: Numerical Dissipation in the Pencil Code
    Simon Candelaresi
    31/10/2025, 11:30
  51. 56. Coding session: merging backreact_infl and klein_gordon modules + adding scalar/fluid coupling
    31/10/2025, 14:00
  52. 57. PCUM25 closure
    Alberto Roper Pol
    31/10/2025, 16:00
  53. 14. Contributing to the code. SVN and Github
    Alberto Roper Pol
  54. 49. Lattice simulation of axion-U(1) inflation
    Ramkishor Sharma (University of Hyderabad)