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- W2765702557 abstract "We present a new block-based preconditioner for simulating all-speed compressible flow with phase change. The conservation equations are discretized with a reconstructed Discontinuous Galerkin method and integrated in time with fully implicit time discretization schemes. The resulting set of non-linear equations is converged using a robust Newton-Krylov framework. Due to the stiffness of the underlying physics associated with stiff acoustic waves and viscous material strength effects, we solve for the primitive-variables (pressure, velocity, and temperature). To enable convergence of the highly ill-conditioned linearized systems, we develop a physics-based preconditioner, utilizing approximate block factorization techniques to reduce the fully-coupled 3 × 3 system to a pair of reduced 2 × 2 systems. We demonstrate that our preconditioned Newton-Krylov framework converges on very stiff multi-physics problems with excellent algorithmic and parallel scalability. Results are shown for the classic lid-driven cavity flow problem as well as for 3D laser-induced phase change." @default.
- W2765702557 created "2017-11-10" @default.
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- W2765702557 date "2017-07-30" @default.
- W2765702557 modified "2023-09-24" @default.
- W2765702557 title "Preconditioning for the All-Speed Compressible Navier-Stokes Equations With Laser-Induced Phase Change" @default.
- W2765702557 doi "https://doi.org/10.1115/fedsm2017-69100" @default.
- W2765702557 hasPublicationYear "2017" @default.
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