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Quinoa v0.3

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@jbakosi jbakosi released this 09 Oct 15:24
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Quinoa_v0.3
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jbakosi Jozsef Bakosi
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jbakosi Jozsef Bakosi
GPG key ID: 2E9FD0B6D5A375C6
Learn about vigilant mode.

Quinoa v0.3, C-20072

Quinoa is a set of computational tools that enables research and numerical analysis in fluid dynamics. Using the Charm++ runtime system, we employ asynchronous (or non-blocking) parallel programming and decompose computational problems into a large number of work units (that may be more than the available number of processors) enabling arbitrary overlap of parallel computation, communication, input, and output. Then the runtime system dynamically and automatically homogenizes computational load across the simulation distributed across many computers.

Quinoa consists of the following tools:

  • Walker, a mathematical tool to analyze and design the behavior of stochastic differential equations. Solving a multivariate Fokker-Planck equation, it allows the estimation of arbitrary coupled statistics and probability distributions as they evolve in time and is used for the design of statistical moment approximations for turbulent flows in engineering.

  • Inciter, is a distributed-memory-parallel fluid solver for complex 3D engineering geometries. Inciter can solve the Euler equations, modeling ideal single-material compressible flow, using continuous and discontinuous Galerkin finite element methods, with solution-adaptive mesh-, and polynomial-degree refinement, enabling dynamically concentrating compute resources to regions with interesting physics. Compared to the previous release (LA-CC-17-087) current development continues in the following directions: (A) a new solver for multi-material flows (single velocity, multiple densities, multiple mass fractions, and multiple internal energies) solving the Euler equations for simple ideal gases, (B) polynomial adaptation for both single-, and multi-material flows, (C) productize the solvers (i.e., increase robustness, user-friendliness, and add practicality features), and (D) prototype implementation of 3D parallel mesh-to-mesh solution transfer to enable fluid-structure interaction problems, coupling compressible flow with the kinematics of rigid body motion of objects embedded in a fluid flow, allowing the computation of body motion in response to aerodynamic forces.

  • RNGTest, a test harness to subject random number generators to stringent statistical tests enabling quantitative ranking with respect to their quality and computational cost.

  • UnitTest, a unit test harness, running hundreds of tests per second, capable of testing serial, synchronous, and asynchronous functions.

  • MeshConv, a mesh file converter that can be used to convert 3D tetrahedron meshes to and from the following formats: Gmsh, Netgen, ExodusII/SEACAS, HyperMesh, ASC, Omega_h, UGRID, RDGFLO.

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