Results 261 to 270 of about 121,753 (310)

Direct Numerical Simulations of Indoor Ventilation

2012
DNS of turbulent mixed convection in a complicated 3D-domain are performed with a fast fourth order finite-volume method using a separation of variables method together with the capacitance matrix technique. The method generally allows to use hexahedral computational meshes, which are non-equidistant in all directions and non-regular in any two ...
Shishkina, Olga, Wagner, Claus
openaire   +2 more sources

Direct Numerical Simulation of Polycrystals

44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2003
We propose a computational strategy for incorporating microstructural features in the calculation of the eective response of polycrystals. These features include grain orientation, shape and distribution, grain interaction and grain-boundary constraint eects that arise as a consequence of the elastic and plastic-slip anisotropy of the lattice.
Raul Radovitzky, Alberto Cuitino
openaire   +1 more source

Direct numerical simulations of a microswimmer in a viscoelastic fluid

Soft Matter, 2023
We extend the SP method to study the dynamics of squirming and swirling particles in viscoelastic fluids, in order to elucidate the mechanism behind their swimming speed enhancement.
Takuya Kobayashi, Gerhard Jung, Yuki Matsuoka, Yasuya Nakayama, John J. Molina, Ryoichi Yamamoto   +5 more
openaire   +2 more sources

Direct numerical simulation

2000
Direct numerical simulation (DNS) consists in solving the Navier–Stokes equations, resolving all the scales of motion, with initial and boundary conditions appropriate to the flow considered. Each simulation produces a single realization of the flow.
openaire   +2 more sources

On Direct Numerical Simulation of Turbulent Flows

Applied Mechanics Reviews, 2011
The direct numerical simulation of turbulence (DNS) has become a method of outmost importance for the investigation of turbulence physics, and its relevance is constantly growing due to the increasing popularity of high-performance-computing techniques.
openaire   +2 more sources

Direct Numerical Simulation of a Recirculating, Swirling Flow

Flow, Turbulence and Combustion, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Freitag, Martin, Klein, Markus
openaire   +2 more sources

DIRECT NUMERICAL SIMULATION OF FLOW IN A RIBBED CHANNEL

Advances in Computational Heat Transfer. Proceedings of the International Symposium, 1997
The issue of turbine lifetime is an important one, particularly for modern turbines operating at high temperature regimes. A cooling design such as ribs may achieve an improved lifetime and complex mechanisms of heat transfer need to be well studied. In this paper, a Direct Numerical Simulation (DNS) is presented for a 3-D channel flow with two square ...
O LABBÉ, J RYAN, P SAGAUT
openaire   +1 more source

Receptivity by Direct Numerical Simulation

1994
Leading edge receptivity of a laminar boundary layer is investigated with Direct Numerical Simulation of a 2D incompressible flow. The code is written for the primitive variables calculated at the same collocation points. The equations are discretized with a second order scheme in time and in space.
G. Casalis, B. Cantaloube
openaire   +1 more source

Direct Numerical Simulation of Pulsating Jet Mixing

Volume 2: Turbo Expo 2007, 2007
In lean premixed combustors, the fuel/air ratio oscillation can cause a serious problem since it can produce pressure and heat release fluctuations, and further, combustion instability if it is well phased with them. In order to design a system where such air/fuel ratio fluctuation is well suppressed, it is important to understand the mixing process ...
Yun, S., Boulanger, J., Jiang, L. Y.
openaire   +2 more sources

Computing Virtual Mass by Direct Numerical Simulation

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2001
AbstractBubbles resist acceleration with an apparent added mass. An improved knowledge of this virtual mass is desirable for accurate models of bubbly flows, for instance, in a two‐fluid‐model. A high‐resolution, two‐phase numerical code based on a volume‐of‐fluid method is used to compute the virtual mass of air and vapour bubbles in water.
Niemann, J., Laurien, E.
openaire   +1 more source