𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The use of LES subgrid-scale models for shock capturing

✍ Scribed by Nikolaus A. Adams

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
418 KB
Volume
39
Category
Article
ISSN
0271-2091

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A method for modelling of flow discontinuities based on deconvolution with a relaxation regularization (DDM) is compared with an essentially non‐oscillatory scheme (ENO) without further modelling and with a dynamic Smagorinsky subgrid‐scale model (DSM). For the DDM approach, a sufficiently accurate representation of the filtered non‐linear combination of discontinuous solution components which arise from the convection term is obtained by regularized deconvolution applied to the filtered solution. For stable integration the evolution equations are supplemented by a relaxation regularization based on a secondary filter operation and a relaxation parameter. We apply the above method to the generic test case of a two‐dimensional solenoidal velocity fluctuation field interacting with a normal shock. The results demonstrate a good agreement of DDM with a reference computation, while DDM significantly reduces computational cost. Predictions with DDM are found to provide a more accurate representation of the shock–vorticity–wave interaction phenomena than that which can be accomplished using the ENO scheme with or without subgrid‐scale model. Copyright © 2002 John Wiley & Sons, Ltd.

📜 SIMILAR VOLUMES

On the Use of Shock-Capturing Schemes fo
On the Use of Shock-Capturing Schemes for Large-Eddy Simulation
✍ Eric Garnier; Michele Mossi; Pierre Sagaut; Pierre Comte; Michel Deville 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 600 KB

Numerical simulations of freely decaying isotropic fluid turbulence were performed at various Mach numbers (from 0.2 to 1.0) using known shock-capturing Euler schemes (Jameson, TVD-MUSCL, ENO) often employed for aeronautical applications. The objective of these calculations was to evaluate the relev

On the use of high-order finite-differen
On the use of high-order finite-difference discretization for LES with double decomposition of the subgrid-scale stresses
✍ J. Meyers; C. Lacor; M. Baelmans 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 219 KB

## Abstract Large eddy simulation (LES) with additional filtering of the non‐linear term, also coined LES with double decomposition of the subgrid‐scale stress, is considered. In the literature, this approach is mainly encountered in combination with pseudo‐spectral discretization methods. In this

Simulation of daily discharges for the u
Simulation of daily discharges for the upper Durance catchment (French Alps) using subgrid parameterization for topography and a forest canopy climate model
✍ Ulrich Strasser; Pierre Etchevers 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 254 KB

## Abstract This study describes the application of the coupled SAFRAN (meteorological variables), ISBA (soil–vegetation–atmosphere transfer) and CROCUS (snow cover evolution) models to simulate daily discharges for the upper Durance catchment (French Alps) from 1981 to 1994. The results are valida

Investigating the use of spatial discret
Investigating the use of spatial discretization of hydrological processes in conceptual rainfall runoff modelling: a case study for the meso-scale
✍ H. Hellebrand; R. van den Bos 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 524 KB

## Abstract In this study a simple modelling approach was applied to identify the need for spatial complexity in representing hydrological processes and their variability over different scales. A data set of 18 basins was used, ranging between 8 and 4011 km^2^ in area, located in the Nahe basin (Ge