Results 21 to 30 of about 1,892,200 (345)

Direct numerical simulations of particle-laden density currents with adaptive, discontinuous finite elements [PDF]

Geoscientific Model Development, 2014
High-resolution direct numerical simulations (DNSs) are an important tool for the detailed analysis of turbidity current dynamics. Models that resolve the vertical structure and turbulence of the flow are typically based upon the Navier–Stokes ...
S. D. Parkinson, J. Hill, M. D. Piggott, P. A. Allison   +3 more
doaj   +1 more source

Direct Numerical Simulations of Electrophoresis of Charged Colloids [PDF]

, 2006
We propose a numerical method to simulate electrohydrodynamic phenomena in charged colloidal dispersions. This method enables us to compute the time evolutions of colloidal particles, ions, and host fluids simultaneously by solving Newton, advection ...
D. C. Henry, E. Hückel, J.-L. Barrat, Kang Kim, M. Smoluchowski, Ryoichi Yamamoto, T. Yamaue, W. B. Russel, Yasuya Nakayama   +8 more
core   +2 more sources

Direct numerical simulations of vortex rings at ReΓ = 7500 [PDF]

, 2007
We present direct numerical simulations of the turbulent decay of vortex rings with ReΓ = 7500. We analyse the vortex dynamics during the nonlinear stage of the instability along with the structure of the vortex wake during the turbulent stage.
Bergdorf, Michael, Koumoutsakos, Petros, Leonard, Anthony   +2 more
core   +1 more source

Energy transfer and vortex structures: visualizing the incompressible turbulent energy cascade

New Journal of Physics, 2023
The transfer of kinetic energy from large to small scales is a hallmark of turbulent flows. Yet, a precise mechanistic description of this transfer, which is expected to occur via an energy cascade, is still missing.
Ryan McKeown, Alain Pumir, Shmuel M Rubinstein, Michael P Brenner, Rodolfo Ostilla-Mónico   +4 more
doaj   +1 more source

Direct numerical simulations of laminar and transitional flows in diverging pipes

International journal of numerical methods for heat & fluid flow, 2019
Purpose Fluid flows in pipes whose cross-sectional area are increasing in the stream-wise direction are prone to separation of the recirculation region.
D. V. Shenoy, Mostafa Safdari Shadloo, J. Peixinho, A. Hadjadj   +3 more
semanticscholar   +1 more source

Comparison of Flame Propagation Statistics Extracted from Direct Numerical Simulation Based on Simple and Detailed Chemistry—Part 1: Fundamental Flame Turbulence Interaction

Energies, 2021
In the present study, flame propagation statistics from turbulent statistically planar premixed flames obtained from simple and detailed chemistry, three-dimensional Direct Numerical Simulations, were evaluated and compared to each other.
Felix Benjamin Keil, Marvin Amzehnhoff, Umair Ahmed, Nilanjan Chakraborty, Markus Klein   +4 more
doaj   +1 more source

Direct numerical simulations of a high Karlovitz number laboratory premixed jet flame – an analysis of flame stretch and flame thickening

Journal of Fluid Mechanics, 2017
This article reports an analysis of the first detailed chemistry direct numerical simulation (DNS) of a high Karlovitz number laboratory premixed flame. The DNS results are first compared with those from laser-based diagnostics with good agreement.
Haiou Wang, E. Hawkes, Jacqueline H. Chen, Bo Zhou, Zhongshan Li, M. Aldén   +5 more
semanticscholar   +1 more source

Turbulent diffusion: Direct numerical simulation [PDF]

PAMM, 2009
AbstractDirect numerical simulations (DNS) of a vibrating grid turbulence at two different Reynolds numbers (based on an amplitude and frequency of the grid) Re = 500, 1000 are presented. The evolution of a turbulent/non‐turbulent interface was detected and compared to the theoretical results obtained in the paper [1] using Lie group analysis of the ...
George Khujadze, Martin Oberlack
openaire   +1 more source

Resolution requirements for numerical simulations of transition [PDF]

, 1989
The resolution requirements for direct numerical simulations of transition to turbulence are investigated. A reliable resolution criterion is determined from the results of several detailed simulations of channel and boundary-layer ...
AA Wray, DR Williams, FR Hama, J Curry, J Kim, LS Kovasznay, MR Malik, N Gilbert, PS Lowery, PS Marcus, RW Metcalfe, S Biringen, S Biringen, SA Orszag, SA Orszag, TA Zang, TA Zang, TA Zang   +17 more
core   +2 more sources

Numerical Simulations for Indirect and Direct Cooling of 54 V LiFePO₄ Battery Pack

Energies, 2022
In this study, three-dimensional thermal simulations for a 54 V Lithium-ion battery pack composed of 18 LiFePO4 pouch battery cells connected in series were conducted using a multi-scale electrochemical-thermal-fluid model.
Yulong Li, Zhifu Zhou, Laisuo Su, Minli Bai, Linsong Gao, Yang Li, Xuanyu Liu, Yubai Li, Yongchen Song   +8 more
doaj   +1 more source