Asynchronous Navier-Stokes Solver on 3D Unstructured Grids for the Exascale Era

Technical Report · Tue Sep 24 00:00:00 EDT 2019

DOI:https://doi.org/10.2172/1569577· OSTI ID:1569577

Bakosi, Jozsef  ^[1]; Bird, Robert Francis  ^[1]; Junghans, Christoph  ^[1]; Pandare, Aditya Kiran  ^[1]; Pavel, Robert Stephen  ^[1]; Waltz, Jacob I.  ^[1]; Li, Weizhao ^[2]; Luo, Hong ^[2]; Bohm, Eric ^[3]; Kale, Laxmikant ^[3]; Mikida, Eric ^[3]; Ramos, Evan ^[3]; Barnett, Joshua ^[4]; Collins, Gary ^[5]; Pakki, Aditya ^[6]

---

1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
2. North Carolina State University, Raleigh, NC (United States)
3. Charmworks, Inc., Champaign, IL (United States)
4. Georgia Institute of Technology, Atlanta, GA (United States)
5. Univ. of Tennessee, Knoxville, TN (United States)
6. Univ. of Utah, Salt Lake City, UT (United States)

This project has developed multiple fluid dynamics solvers for complex 3D flows using fully asynchronous distributed-memory task-parallel algorithms on top of the Charm++ runtime system. The algorithms solve the Euler or Navier-Stokes equations of compressible flows using unstructured tetrahedron meshes with optional solution-adaptive mesh-, and polynomial-order refinement. We have demonstrated excellent strong scaling up 50K compute cores and the benefits of Charm++’s automatic load balancing.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: 89233218CNA000001
• OSTI ID: 1569577
• Report Number(s): LA-UR-19-29712
• Country of Publication: United States
• Language: English

Related Subjects

Hydrodynamics
Finite Element Methods
Charm++
Load Balancing