Results 61 to 70 of about 25,672 (196)
Improvements in Turbulent Jet Particle Dispersion Modeling and Its Validation with DNS
AtmosphereParticle dispersion models (PDMs) are essential to capture the influence of unresolved turbulent eddies on particle transport in computational fluid dynamics (CFD) simulations.
Ege Batmaz +3 more
doaj +1 more source
Role of the vertical pressure gradient in wave boundary layers [PDF]
, 2014 The pressure field in an oscillatory boundary layer is obtained by means of direct numerical simulations (DNS). The vertical pressure gradient is treated as any other turbulence quantity and its statistical properties are calculated from the DNS data ...
Blondeaux, Paolo +3 more
core
The analysis and modeling of dilatational terms in compressible turbulence [PDF]
It is shown that the dilatational terms that need to be modeled in compressible turbulence include not only the pressure-dilatation term but also another term - the compressible dissipation.
Erlebacher, G. +3 more
core +1 more source
Self-truncation and scaling in Euler-Voigt-$\alpha$ and related fluid models
, 2015 A generalization of the $3D$ Euler-Voigt-$\alpha$ model is obtained by introducing derivatives of arbitrary order $\beta$ (instead of $2$) in the Helmholtz operator.
Brachet, Marc +2 more
core +2 more sources
AerospaceThe current study investigates the performance of implicit Large Eddy Simulation (iLES) incorporating an unstructured third-order Weighted Essentially Non-Oscillatory (WENO) reconstruction method, alongside conventional Large Eddy Simulation (LES) using ...
Zhuoneng Li, Zeeshan A. Rana
doaj +1 more source
DNS of turbulent Schmidt number and eddy diffusivity for reactive concentrations
Nihon Kikai Gakkai ronbunshu, 2014 The gradient diffusion hypothesis for turbulent mass fluxes of reactive scalar is investigated by using direct numerical simulations (DNS) of a planar jet with a second-order chemical reaction A+B→R.
Tomoaki WATANABE +5 more
doaj +1 more source
An algebraic-closure-based momentmethod for unsteady Eulerian modeling of non-isothermal particle-laden turbulent flows in very dilute regime and high Stokes number [PDF]
An algebraic-closure-based moment method (ACBMM) is developed for unsteady Eulerian particle simulations coupled with direct numerical simulations (DNS) of non-isothermal fluid turbulent flows, in very dilute regime and for large Stokes numbers.
Masi, Enrica, Simonin, Olivier
core
, 2018 The present paper deals with the problem of improving the efficiency of large scale turbulent flow simulations. The high-fidelity methods for modelling turbulent flows become available for a wider range of applications thanks to the constant growth of ...
Krasnopolsky, Boris
core +1 more source
Spectral element simulations of flow past an ellipsoid at different Reynolds numbers
Electronic Journal of Differential Equations, 2009 A new method is developed to simulate the fully coupled motion involving an ellipsoidal particle and the ambient fluid. This method essentially reduces a two-phase flow problem into a single-phase fluid flow problem.
Don Liu +2 more
doaj
Magnetized Fingering Convection in Stars
The Astrophysical JournalFingering convection (also known as thermohaline convection) is a process that drives the vertical transport of chemical elements in regions of stellar radiative zones where the mean molecular weight increases with radius.
Adrian E. Fraser +2 more
doaj +1 more source