[hpc-announce] 15th LANL Co-Design Summer School

[Loiseau, Julien]

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15th LOS ALAMOS NATIONAL LABORATORY CO-DESIGN SUMMER SCHOOL

LANLCoD 2025 Summer School

Los Alamos National Laboratory, Los Alamos, New Mexico, USA.

10 weeks between May to August.

https://urldefense.us/v3/__https://codesign.lanl.gov/__;!!G_uCfscf7eWS!cDUai5C7RTF4jOjcOpi4PHZ9OGQjkrz7UBsCvKRD42UbMpWJO7BMKs8i442I7CWwKEaxC71Md6Kne4IqtXtWz9vlJw$ 

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Organized by CCS-7, Co-Design group, at LANL.
Contacts: jloiseau at lanl.gov and hyunlim at lanl.gov

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Early registration until: January 10, 2025

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SCOPE:  Model implosion dynamics at scale on Venado using FleCSI-HARD

Predictions of the implosion dynamics and the level of shell distortion induced by hydrodynamic instabilities such as Richtmyer-Meshkov are essential to model contemporary inertial confinement fusion (ICF) experiments. Radiation also plays a key role in these phenomena. Therefore, detailed radiation hydrodynamics simulations are crucial to understand these phenomena properly. In the Co-Design Summer School (CDSS) 2025, we propose using the FleCSI Hydrodynamics and Radiative Diffusion (FleCSI-HARD) framework to model various implosion dynamics and simulate the instabilities associated with these phenomena. FleCSI-HARD is an open-source radiation hydrodynamics code that was developed from FleCSI-SP by the students of CDSS 2024. This code implements a basic flux limited diffusion (FLD) model and a multigrid solver. CDSS 2025 will focus on updating the FleCSI-HARD code and testing it at scale. Details are as follows.
- More complex radiation hydrodynamics schemes will be implemented for the current code with the addition of different possible closures: radiation energy-pressure relation called Pn, variable Eddington factor, Larsen-FLD, etc.
- A better set of solvers will be implemented through the use of FleCSolve, a FleCSI-based code supporting Algebraic Multigrid methods.
- Variable opacity and a time-stepping/integration scheme will be added for better performance and accuracy.
- The code will then be tested with verification and validation problem setups such as the ExactPack project (https://urldefense.us/v3/__https://github.com/lanl/ExactPack__;!!G_uCfscf7eWS!cDUai5C7RTF4jOjcOpi4PHZ9OGQjkrz7UBsCvKRD42UbMpWJO7BMKs8i442I7CWwKEaxC71Md6Kne4IqtXup6O_LCQ$ ). The school will model large-scale three-dimensional single and double shell implosion problems with multi-mode instabilities that can be used in ICF studies.


ADDRESSED TO:

Graduate students, Ph.D. students in Computer Science, Applied Mathematics, and Physics.
- Computer Scientists: Specializations in HPC with expertise in MPI, benchmarking, GPU programming, optimization, and performance analysis.
- Applied Mathematicians: Focus on numerical methods, including experience with implicit solvers, preconditioners, and developing or using linear algebra libraries.
- Physicists: Strong background in hydrodynamics, radiation physics, and shock physics with an interest in applying these areas to computational simulations.

VENUE:

LANL Co-Design 2025 Summer School will take place at Los Alamos National Laboratory, Los Alamos, New Mexico, with a sunny climate throughout the year.
Few hours from the main USA National Parks of Grand Canyons, Zion or Arches, the laboratory is ideally located to discover and visit the south-west of the USA.

STRUCTURE:

The Los Alamos National Laboratory Co-Design Summer School was created to train future scientists to work on the kinds of interdisciplinary teams that are demanded by today’s scientific challenges. Launched in 2011, the summer school recruits top candidates in a range of fields spanning domain sciences, applied mathematics, computational and computer sciences, and computer architecture. Participants work together to solve a focused problem that is designed to build the skills needed to tackle the grand challenges of the future. Foremost among the skills on which we focus is the ability of students to work across disciplines with other team members, while employing their own unique expertise. This is the heart of Co-Design.

Co-Design is the social and technical equivalent of a multiple-constraint optimization problem. The rapid evolution of computing architectures and the expanding space between specializations in domain science and computer architecture means that it is virtually impossible for a single individual to cover all of the skills needed to solve current-day computational science challenges. Co-Design bridges this space through interactions between members of an interdisciplinary team. With the right amount of overlap, team members can communicate with each other effectively to solve a problem.

REGISTRATION:

All the information for application and the application form can be found at: https://urldefense.us/v3/__https://lanl.github.io/cdss/apply.html__;!!G_uCfscf7eWS!cDUai5C7RTF4jOjcOpi4PHZ9OGQjkrz7UBsCvKRD42UbMpWJO7BMKs8i442I7CWwKEaxC71Md6Kne4IqtXsu0YnZEQ$ 


ACCOMMODATION:

10 week salary of $9-15K (based on education and experience)
LANL can handle VISA (J1) for international students for the duration of the school.