Results 71 to 80 of about 52,645 (193)

Boundary conditions and SGS models for LES of wall-bounded separated flows: an application to engine-like geometries [PDF]

, 2014
The implementation and the combination of advanced boundary conditions and subgrid scale models for Large Eddy Simulations are presented. The goal is to perform reliable cold flow LES simulations in complex geometries, such as in the cylinders of ...
MONTORFANO, ANDREA, ONORATI, ANGELO, PISCAGLIA, FEDERICO   +2 more
core  

Surface-sampled simulations of turbulent flow at high Reynolds number

, 2017
A new approach to turbulence simulation, based on a combination of large-eddy simulation (LES) for the whole flow and an array of non-space-filling quasi-direct numerical simulations (QDNS), which sample the response of near-wall turbulence to large ...
Jacobs, Christian T., Johnstone, Roderick, Sandham, Neil D.   +2 more
core   +1 more source

Evaluation of Third-Order Weighted Essentially Non-Oscillatory Scheme Within Implicit Large Eddy Simulation Framework Using OpenFOAM

Aerospace
The 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

Numerical Modelling of Air Pollutant Dispersion in Complex Urban Areas: Investigation of City Parts from Downtowns Hanover and Frankfurt

Fluids, 2019
Hazardous gas dispersion within a complex urban environment in 1:1 scaled geometry of German cities, Hanover and Frankfurt, is predicted using an advanced turbulence model.
Mohamed Salah Idrissi, Nabil Ben Salah, Mouldi Chrigui   +2 more
doaj   +1 more source

Coherent structures in fully-developed pipe turbulence [PDF]

, 2009
A turbulent mean profile for pipe flow is prescribed which closely matches experimental observations. The nature of perturbations superimposed upon this profile is then considered.
Cossu, C., Hwang, Y., Willis, A. P.
core   +2 more sources

Modelling and Simulation of Effusion Cooling—A Review of Recent Progress

Energies
Effusion cooling is often regarded as one of the critical techniques to protect solid surfaces from exposure to extremely hot environments, such as inside a combustion chamber where temperature can well exceed the metal melting point.
Hao Xia, Xiaosheng Chen, Christopher D. Ellis   +2 more
doaj   +1 more source

Meso-microscale numerical simulation in marine wind environments considering air-sea coupling

Kongqi donglixue xuebao
Standalone mesoscale numerical weather prediction models often neglect two key aspects when simulating wind speed: first, the influence of sea surface changes due to wave propagation and current evolution on wind turbulence; second, the ability to ...
Yukun Sun, Yukun Sun, Xiandong Ma, Tongguang Wang, Long Wang, Meilin Wang   +5 more
doaj   +1 more source

Numerical Investigation of Terrain-Induced Turbulence in Complex Terrain Using High-Resolution Elevation Data and Surface Roughness Data Constructed with a Drone

Energies, 2019
Using the method based on unmanned aerial vehicle (UAV) imagery, two kinds of data can be obtained: the digital elevation model (DEM) for the digital expression of terrain, and the digital surface model (DSM) for the digital expression of the surface of ...
Takanori Uchida
doaj   +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

Numerical simulation of gas jet noise in the underwater blowdown process

Zhongguo Jianchuan Yanjiu, 2019
[Objectives] The characteristics and influencing factors of the radiated noise generated by the blowdown of sewage from underwater vehicles is investigated.[Methods] The flow field analysis and the quantitative calculation of radiated noise of large ...
Cai Biaohua, Xiao Longzhou, Fang Chao, Qin Ziming, Shi Zhaocun   +4 more
doaj   +1 more source