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Showing 1 to 16 of 16 for “"upwind scheme"”.
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Development of an improved multi-dimensional upwind scheme for Euler/Navier-Stokes computations
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:55:07Z Item is restricted indefinitely.
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Higher order numerical schemes for propagation of wind wave spectra
… coarse grids in all four dimensions. Propagation schemes used in these models, typically the 1st order upwind scheme, encounter difficulty arising from the poor directional resolution (typically 30 degrees) in regions of varying depth and current where wave energy is refracted and concentrated …
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Mathematical modelling of evaporation mechanisms and instabilities in cryogenic liquids
… for the main model were solved using an explicit upwind scheme for the vorticity-transport, temperature and concentration equations and the multigrid method for the Poisson equation. From plots of the evolution of the system, it is found that convection becomes stronger when preferential …
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Two-phase two-fluid model solver based on a high-resolution total variation diminishing scheme
… Total Variation Diminishing (TVD) scheme. The new scheme is derived first for scalar hyperbolic problems using the method of flux limiters, then extended to the two-phase two-fluid model. A hybridization of the monotone 1st-order upwind scheme and the Quadratic Upstream …
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Unstructured staggered mesh discretisation methods for computational fluid dynamics
… cell centres. The very well known pressure based scheme SIMPLE is employed for pressure and velocity coupling. Three different approaches on unstructured staggered meshes are proposed. The first method solves for normal velocity component and interpolates the tangential velocity component, the …
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Solar Wind-Magnetosphere Coupling: A Global Perspective of Reconnection in the Magnetotail
… Framework/Block Adaptive Tree Solar-wind Roe Upwind Scheme (SWMF/BATS-R-US) model from NASA’s Community Coordinated Modeling Center (CCMC) with a special, high resolution grid. The results of this work will be highly relevant to future solar wind observation missions, global-scale …
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Methodological Developments for an Improved Evaluation of Climate Change Impact on Flow Hydrodynamics in Estuaries
… a well-balanced positivity preserving central-upwind method is developed for the unstructured quadrilateral grids. The quadrilateral grid can effectively simulate complex domains and is shown to have advantages over the triangular grids. The proposed central-upwind scheme is well-balanced and …
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Multiphase CFD modelling of stirred tanks
… steady state and a transient approach. The QUICK scheme was used for the discretisation of the volume fraction and momentum and the first order upwind scheme for the discretisation of the turbulent kinetic energy and dissipation rate. The standard k - E turbulence model was used to account for the …
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Experimental and Numerical Investigations of the Effects of Incident Turbulence on the Flow Over a Surface-Mounted Prism
… inflow, are performed. The use of a fifth-order scheme (CUD-II-5), which is a member of a family of Compact Upwind Difference schemes, in large eddy simulations of this flow is assessed. The performance of this scheme is validated by comparing the rate of temporal decay of isotropic turbulence …
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Three-dimensional upward scheme for solving the Euler equations on unstructured tetrahedral grids
A new upwind scheme is developed for solving the three-dimensional Euler equations on unstructured tetrahedral meshes. The method yields solution accuracy and efficiency comparable to that currently available from similar structured-grid codes. The key to achieving this result is a novel cell …
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One-dimensional positive displacement pump description in cavitating conditions
… speed of sound variation. The adopted solutionscheme is a finite volume method with a Monotonic Upwind Scheme forConservational Law (MUSCL). This algorithm is second-order accurate intime and space, with a total variation diminishing (TVD) scheme to preventspurious oscillation. In order to …
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Turbulence Modelling of Tidal Currents in Rectangular Harbours
… Likewise, the Alternating Direction Implicit scheme has again been used for solving the discretized turbulence equations. In the hydrodynamic equations the advective acceleration terms have been treated using the third-order upwind scheme, whereas the counterpart terms in the turbulence …
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Numerical studies of unsteady flow past bluff bodies
Unsteady flow past prismatic two dimensional bodies have been numerically studied by solving the full Navier-Stokes equations at Reynolds numbers up to 1000 to study onset of vortex shedding and early stages of flow evolution. Loads have been calculated for the trapezoid section by solving Poisson …
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Fast Marching Methods - parallel implementation and analysis
… and on algorithm ability to preserve the upwind structure of the numerical scheme during execution. To address these problems, I develop several parallel strategies which allow fast convergence. The strengths of these approaches are illustrated on a series of benchmarks which include the …
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New efficient contact discontinuity capturing techniques in supersonic flow simulations
… approaches: a kinetic fluctuation splitting scheme and a discontinuity confinement scheme based on an antidiffusion approach. In both approaches cell-vertex fluctuation-splitting methods are used in order to generate a multi-dimensional procedure. The kinetic fluctuation-splitting scheme …