Publication type: Conference paper
Type of review: Not specified
Title: A finite-volume gas-kinetic method for the solution of the Navier-Stokes equations
Authors: Righi, Marcello
Proceedings: Proceedings of the RAeS Applied Aerodynamics Conference
Conference details: RAeS Applied Aerodynamics Conference, Bristol, United Kingdom, 17-19 July 2012
Issue Date: 2012
Publisher / Ed. Institution: Royal Aeronautical Society
Publisher / Ed. Institution: London
Language: English
Subjects: Turbulence Modelling; Gas-kinetic scheme; Compressible Flow
Subject (DDC): 530: Physics
Abstract: Gas-kinetic theory is also valid in the continuum regime: the Euler and Navier-Stokes equations can be obtained as projection of the Boltzmann equation on to the physical space (x, t). The numerical schemes derived from gas-kinetic theory are computationally more expensive than Navier-Stokes based ones, but offer advantages which have been attracting a growing level of attention: they can (i) accommodate discontinuities at cells interface, (ii) provide high-resolution fluxes, (iii) provide advantages in the simulation of turbulence, (iv) handle hypersonic and / or rarefied flows. This study extends the validation of gas-kinetic schemes investigating a few turbulent flow cases. At a slightly higher computational cost, gas-kinetic schemes provide results comparable to those obtained with well-validated Navier-Stokes schemes using the same turbulence model, grid and reconstruction order. In the case of shock-separated flows, the results obtained with the gas-kinetic scheme are even closer to experimental data. These findings are consistent with the idea that gas-kinetic theory is a physically more consistent framework for investigating the mechanics of fluids.
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Institute of Mechanical Systems (IMES)
Appears in collections:Publikationen School of Engineering

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