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nekbone

NEK5000 emulation software called NEKbone

Nekbone captures the basic structure and user interface of the ex- tensive Nek5000 software. Nek5000 is a high order, incompressible Navier-Stokes solver based on the spectral element method. It has a wide range of applications and intricate customizations available to users. Nekbone, on the other hand, solves a Helmholtz equation in a box, using the spectral element method. It is pared down to include only the necessary features to compile, run, and solve the applications found in the test/ directory. Since almost all prac- tical applications are in the three dimensional space, the solver is set to work with three dimensional geometries as default. Nekbone solves a standard Poisson equation using a conjugate gradient it- eration with a simple or spectral element multigrid preconditioner on a block or linear geometry (parameters are set within the test directory of the simulation). Nekbone exposes the principal compu- tational kernel to reveal the essential elements of the algorithmic- architectural coupling that is pertinent to Nek5000.

More information about nekbone can be found on the CESAR web- site: https://cesar.mcs.anl.gov/content/software/thermal hydraulics or by contacting one of the developers. Paul Fischer : [email protected] Katherine Heisey: [email protected] This document contains the quick start guide, an overview of the more detailed parameters available to the user, a more detailed basis of the representation of nekbone and Nek5000, and an overview of the provided examples

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