Numerical method for large eddy simulation of compressible isotropic turbulence
17 Jun 2019-pp 1-12
About: The article was published on 2019-06-17. It has received 2 citations till now. The article focuses on the topics: Large eddy simulation & Isotropy.
Citations
More filters
Journal Article•
TL;DR: In this article, the thermal effects of plasmas on isotropic turbulence were studied using direct numerical simulations using spherical and conical idealizations of the plasma, and two idealizations were considered.
Abstract: The thermal effects of plasmas on isotropic turbulence are studied using direct numerical simulations. The temperature ratio of the plasma region to the background region is moderate. Two idealizations of the plasma are considered – spherical and conical. The conical idealization is found preferable in that it approximates the tear–drop shape of the plasma region that is observed experimentally, and produces baroclinic vorticity. The variation of the magnitude of the vorticity with temperature ratio and size of plasma region is examined. A blast wave followed by a region of expansion propagates normal to the axis of the plasma region. The turbulence is observed to be suppressed in the core of the plasma, presumably due to bulk expansion.
1 citations
11 Jan 2021
1 citations
References
More filters
TL;DR: The formulation combines the primitive function approach with five-point spatially sixth- and fourth-order methods to develop a fully discrete scheme for linear wave propagation phenomena with particular emphasis on computational electromagnetics in the time-domain.
112 citations
TL;DR: In this article, a class of Pade finite volume methods providing an improved spectral resolution is presented and compared with well-known methods, based on the sliding averages of the variables and allowing the computation of derivatives of all orders.
91 citations
TL;DR: All schemes have been modified to treat multiblock and periodic interfaces in such a way that high-order accuracy, stability, good spectral resolution, conservativeness and low computational costs are guaranteed to insure good scalability of the schemes.
51 citations
08 Jan 2007
TL;DR: To enhance the accuracy and stability of ∞ux interpolation scheme, shock capturing strategy, and subgrid-scale (SGS) modeling, a new scheme with added flrst derivative term from each cell center is proposed, and tested for various benchmark problems.
Abstract: This paper discusses numerical and modeling issues that arise in cell-centered flnitevolume methods (FVM) for large eddy simulation (LES) of compressible ∞ows on unstructured grids. These are: accuracy and stability of ∞ux interpolation scheme, shock capturing strategy, and subgrid-scale (SGS) modeling. To enhance the accuracy of ∞ux reconstruction, a new scheme with added flrst derivative term from each cell center is proposed, and tested for various benchmark problems. It is shown that stability as well as accuracy is determined by the formulation of gradient at cell center. As a shock-capturing method, a characteristic based fllter is formulated for cell-centered FVM on unstructured grids. The fllter is combined with a sensor based on the local divergence and vorticity. Also, a one-equation subgrid model based on the subgrid kinetic energy transport equation for compressible ∞ows is proposed.
44 citations