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Direct numerical simulation of isotropic turbulence interacting with a weak shock wave
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In this paper, the interaction of isotropic quasi-incompressible turbulence with a weak shock wave is investigated, and a linear analysis of the interaction is conducted for comparison with the simulations.Abstract:
Direct numerical simulations are used to investigate the interaction of isotropic quasi-incompressible turbulence with a weak shock wave. A linear analysis of the interaction is conducted for comparison with the simulations. Both the simulations and the analysis show that turbulence is enhanced during the interaction. Turbulent kinetic energy and transverse vorticity components are amplified, and turbulent lengthscales are decreased. It is suggested that the amplification mechanism is primarily linear. Simulations also showed a rapid evolution of turbulent kinetic energy just downstream of the shock, a behavior not reproduced by the linear analysis. Analysis of the budget of the turbulent kinetic energy transport equation shows that this behavior can be attributed to the pressure transport term. Multiple compression peaks were found along the mean streamlines at locations where the local shock thickness had increased significantly.read more
Citations
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DIRECT NUMERICAL SIMULATION: A Tool in Turbulence Research
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TL;DR: In this article, direct numerical simulation (DNS) of turbulent flows has been reviewed and the complementary nature of experiments and computations in turbulence research has been illustrated, as well as how DNS has impacted turbulence modeling and provided further insight into the structure of turbulent boundary layers.
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Large-Eddy Simulation of the Shock/Turbulence Interaction
TL;DR: In this article, the authors derive a shock capturing tool able to treat turbulence with minimum dissipation out of the shock for a large-eddy simulation (LES) of the interaction.
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Computational aeroacoustics: progress on nonlinear problems of sound generation
Tim Colonius,Sanjiva K. Lele +1 more
TL;DR: A hierarchy of computational approaches that range from semi-empirical schemes that estimate the noise sources using mean-flow and turbulence statistics, to high-fidelity unsteady flow simulations that resolve the sound generation process by direct application of the fundamental conservation principles is discussed in this paper.
Journal ArticleDOI
Conservative Hybrid Compact-WENO Schemes for Shock-Turbulence Interaction
TL;DR: In this paper, an efficient hybrid compact-WENO scheme is proposed to obtain high resolution in shock-turbulence interaction problems, which is based on a fifth-order compact upwind algorithm in conservation form to solve for the smooth part of the flow field.
Journal ArticleDOI
Magnetic field amplification by shocks in turbulent fluids
Joe Giacalone,J. R. Jokipii +1 more
TL;DR: In this article, the authors consider the effect of preexisting, large-scale, broadband turbulent density fluctuations on propagating hydromagnetic shock waves and find that the density fluctuations not only distort the shape of the shock front and lead to a turbulent postshock fluid, but also produce a number of important changes in the post-shock magnetic field.
References
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Journal ArticleDOI
Compact finite difference schemes with spectral-like resolution
TL;DR: In this article, the authors present finite-difference schemes for the evaluation of first-order, second-order and higher-order derivatives yield improved representation of a range of scales and may be used on nonuniform meshes.
Journal ArticleDOI
Time-dependent boundary conditions for hyperbolic systems, II
TL;DR: In this article, nonreflecting boundary conditions are defined for multidimensional fluid dynamics problems where waves enter and leave the interior of a domain modeled by hyperbolic equations, and separate equations for each type of incoming and outgoing wave.
Journal ArticleDOI
Nonreflecting boundary conditions for Euler equation calculations
TL;DR: In this paper, a unified theory for the construction of steady-state and unsteady nonreflecting boundary conditions for the Euler equations is presented, which allows calculatios to be performed on truncated domains without the generation of spurious nonphysical reflections at the far-field boundaries.
Journal ArticleDOI
The analysis and modelling of dilatational terms in compressible turbulence
TL;DR: It is proposed that, in moderate Mach number homogeneous turbulence, the compressible component of the turbulence is in quasi-equilibrium with respect to the incompressible turbulence.
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