Results 51 to 60 of about 28,275 (194)

Fast Numerical simulations of 2D turbulence using a dynamic model for Subgrid Motions [PDF]

, 2001
We present numerical simulation of 2D turbulent flow using a new model for the subgrid scales which are computed using a dynamic equation linking the subgrid scales with the resolved velocity.
B. Dubrulle, Babiano, Babiano, Bartello, Berger, Berger, Brachet, Dubrulle, Dubrulle, Dubrulle, Farge, Farge, Grossmann, J.-P. Laval, Laval, Laval, Laval, Laval, Leonard, Mariotti, Meneguzzi, Nazarenko, Nazarenko, Nazarenko, Nazarenko, Oberlack, S.V. Nazarenko, Sadourny, Schneider, Werne   +29 more
core   +3 more sources

Riblet Drag Reduction Modeling and Simulation

Fluids, 2022
One of the most interesting passive drag reduction techniques is based on the use of riblets or streamwise grooved surfaces. Detailed flow features inside the grooves can be numerically detected only by Direct Numerical Simulations (DNS), still ...
Benedetto Mele
doaj   +1 more source

Sound Generation by a Turbulent Flow in Musical Instruments - Multiphysics Simulation Approach - [PDF]

, 1998
Total computational costs of scientific simulations are analyzed between direct numerical simulations (DNS) and multiphysics simulations (MPS) for sound generation in musical instruments. In order to produce acoustic sound by a turbulent flow in a simple
Aoyagi, Mutsumi, Kobayashi, Taizo, Mibu, Ryota, Takahashi, Kin'ya, Takami, Toshiya   +4 more
core   +3 more sources

Direct numerical simulation and large-eddy simulation of stationary buoyancy-driven turbulence [PDF]

, 2010
We report direct numerical simulation (DNS) and large-eddy simulation (LES) of statistically stationary buoyancy-driven turbulent mixing of an active scalar. We use an adaptation of the fringe-region technique, which continually supplies the flow with
Chung, D., Pullin, D. I.
core  

Direct numerical simulation of turbulent channel flow up to $Re_\tau \approx 5200$

, 2015
A direct numerical simulation of incompressible channel flow at $Re_\tau$ = 5186 has been performed, and the flow exhibits a number of the characteristics of high Reynolds number wall-bounded turbulent flows. For example, a region where the mean velocity
Lee, Myoungkyu, Moser, Robert D.
core   +1 more source

Lattice Boltzmann method for direct numerical simulation of turbulent flows

, 2010
We present three-dimensional numerical simulations (DNS) of the Kida vortex flow, a prototypical turbulent flow, using a novel high-order lattice Boltzmann model.
Boulouchos, K.B., Chikatamarla, S.S., Frouzakis, C.E., Karlin, I.V., Tomboulides, A.G.   +4 more
core   +1 more source

Direct Numerical Simulation of the Differentially Heated Cavity and Comparison with the κ-ε Model for High Rayleigh Numbers

Modelling
This study presents a numerical comparison between Direct numerical simulation (DNS) and the standard κ-ε turbulence model to evaluate natural convection in a two-dimensional, differentially heated, air-filled cavity over the Rayleigh number range 103 to
Fernando Iván Molina-Herrera, Hugo Jiménez-Islas   +1 more
doaj   +1 more source

The Effect of Coherent Structures on Stochastic Acceleration in MHD Turbulence

, 2005
We investigate the influence of coherent structures on particle acceleration in the strongly turbulent solar corona. By randomizing the Fourier phases of a pseudo-spectral simulation of isotropic MHD turbulence (Re $\sim 300$), and tracing collisionless ...
Achterberg A., Bernard Knaepen, Bieber J. W., Buchner J., Daniele Carati, Dreicer H., Kanbach G., Kaspar Arzner, Kolmogoroff A. N., Kolmogoroff A. N., Loukas Vlahos, Miller J. A., Nicolas Denewet, Urch I. H., Urch I. H.   +14 more
core   +2 more sources

Premixed turbulent flame calculation [PDF]

The importance of turbulent premixed flames in a variety of applications has led to a substantial amount of effort towards improving the understanding of these flames.
El-Tahry, S., Ferziger, J. H., Rogers, M. M., Rutland, C. J.   +3 more
core   +1 more source

Time-accurate simulations of a shear layer forced at a single frequency [PDF]

Calculations are presented for the forced shear layer studied experimentally by Oster and Wygnanski, and Weisbrot. Two different computational approaches are examined: Direct Numerical Simulation (DNS) and Large Eddy Simulation (LES).
Claus, R. W., Huang, P. G., Macinnes, J. M.   +2 more
core   +1 more source