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- Xiangyu Hu, Nikolaus A. Adams, Gianluca Iaccarino
- J. Comput. Physics
- 2009

Keywords: Multi-fluid flow Compressible flow Riemann solver Roe approximation a b s t r a c t In this work, the HLLC Riemann solver, which is much more robust, simpler and faster than iterative Riemann solvers, is extended to obtain interface conditions in sharp-interface methods for compressible multi-fluid flows. For interactions with general equations of… (More)

The application of the Immersed Boundary ͑IB͒ method to simulate incompressible, turbulent flows around complex configurations is illustrated; the IB is based on the use of non-body conformal grids, and the effect of the presence of a body in the flow is accounted for by modifying the governing equations. Turbulence is modeled using standard… (More)

- By Krishnan, Mahesh, +4 authors P. Moin
- 2001

1. Motivation and objectives This report discusses our progress towards developing a numerical algorithm, and solver capable of performing large-eddy simulation in geometries as complex as the combustor of a gas-turbine engine. LES is considered a particularly attractive approach for combustor simulation because of its demonstrated superiority over RANS in… (More)

- Alireza Doostan, Gianluca Iaccarino
- J. Comput. Physics
- 2009

Keywords: Uncertainty quantification Separated representation Alternating least-squares Curse of dimensionality Stochastic partial differential equations a b s t r a c t Uncertainty quantification schemes based on stochastic Galerkin projections, with global or local basis functions, and also stochastic collocation methods in their conventional form, suffer… (More)

- Ken Mattsson, Frank E. Ham, Gianluca Iaccarino
- J. Sci. Comput.
- 2009

A stable and accurate boundary treatment is derived for the second-order wave equation. The domain is discretized using narrow-diagonal summation by parts operators and the boundary conditions are imposed using a penalty method, leading to fully explicit time integration. This discretization yields a stable and efficient scheme. The analysis is verified by… (More)

- Marco D. de Tullio, Pietro De Palma, Gianluca Iaccarino, Giuseppe Pascazio, Michele Napolitano
- J. Comput. Physics
- 2007

This paper combines a state-of-the-art method for solving the three-dimensional preconditioned Navier–Stokes equations for compressible flows with an immersed boundary approach, to provide a Cartesian-grid method for computing complex flows over a wide range of the Mach number. Moreover, a flexible local grid refinement technique is employed to achieve high… (More)

- Per Pettersson, Gianluca Iaccarino, Jan Nordström
- J. Comput. Physics
- 2009

The Burgers' equation with uncertain initial and boundary conditions is investigated using a polynomial chaos (PC) expansion approach where the solution is represented as a truncated series of stochastic, orthogonal polynomials. The analysis of well-posedness for the system resulting after Galerkin projection is presented and follows the pattern of the… (More)

- Seongwon Kang, Gianluca Iaccarino, Frank E. Ham
- J. Comput. Physics
- 2009

Keywords: Immersed boundary Conjugate heat transfer Turbulent flow Bluff body Buoyancy a b s t r a c t A novel immersed boundary (IB) method has been developed for simulating multi-material heat transfer problem – a cylinder in a channel heated from below with mixed convection. The method is based on a second-order velocity/scalar reconstruction near the… (More)

- Seongwon Kang, Gianluca Iaccarino, Frank E. Ham, Parviz Moin
- J. Comput. Physics
- 2009