Results 31 to 40 of about 107,584 (238)

Spectral-element simulations of variable-density turbulent flow in a plane channel

EPJ Web of Conferences, 2017
We perform Large-eddy simulations (LES) of the turbulent flow in a channel with isothermal heated walls with the temperature ratio equal to 2. The variable properties of the fluid are accounted for by using the low Mach number approximation. The Reynolds
Ryzhenkov Vladimir, Ivashchenko Vladislav, Vinuesa Ricardo, Mullyadzhanov Rustam   +3 more
doaj   +1 more source

Numerical study of dynamo action at low magnetic Prandtl numbers [PDF]

, 2004
We present a three--pronged numerical approach to the dynamo problem at low magnetic Prandtl numbers $P_M$. The difficulty of resolving a large range of scales is circumvented by combining Direct Numerical Simulations, a Lagrangian-averaged model, and ...
Mininni, P. D., Montgomery, D. C., Pinton, J. -F., Politano, H., Ponty, Y., Pouquet, A.   +5 more
core   +7 more sources

Shock Capturing in Large Eddy Simulations by Adaptive Filtering

Fluids, 2019
A method for shock capturing by adaptive filtering for use with high-resolution, high-order schemes for Large Eddy Simulations (LES) is presented. The LES method used in all the examples here employs the Explicit Filtering approach and the spatial ...
Sumit Kumar Patel, Joseph Mathew
doaj   +1 more source

Boundary Conditions and SGS Models for LES of Wall-Bounded Separated Flows: An Application to Engine-Like Geometries

Oil & Gas Science and Technology, 2013
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 ...
Piscaglia F., Montorfano A., Onorati A., Brusiani F.   +3 more
doaj   +1 more source

Deep Learning-Based Eddy Viscosity Modeling for Improved RANS Simulations of Wind Pressures on Bluff Bodies [PDF]

Journal of Applied Fluid Mechanics
Accurate prediction of wind pressures on buildings is crucial for designing safe and efficient structures. Existing computational methods, like Reynolds-averaged Navier-Stokes (RANS) simulations, often fail to predict pressures accurately in separation ...
A. M. Aly
doaj   +1 more source

Large‐eddy simulations over Germany using ICON: a comprehensive evaluation

, 2017
Large‐eddy simulations (LES) with the new ICOsahedral Non‐hydrostatic atmosphere model (ICON) covering Germany are evaluated for four days in spring 2013 using observational data from various sources. Reference simulations with the established Consortium
Rieke Heinze, A. Dipankar, C. C. Henken, C. Moseley, O. Sourdeval, S. Trömel, Xinxin Xie, P. Adamidis, F. Ament, H. Baars, C. Barthlott, A. Behrendt, U. Blahak, S. Bley, Slavko Brdar, M. Brueck, S. Crewell, H. Deneke, P. Di Girolamo, Raquel Evaristo, J. Fischer, Christopher Frank, P. Friederichs, Tobias Göcke, Ksenia Gorges, L. Hande, M. Hanke, Akio Hansen, H. Hege, C. Hoose, T. Jahns, N. Kalthoff, D. Klocke, S. Kneifel, P. Knippertz, A. Kuhn, Thriza van Laar, A. Macke, V. Maurer, B. Mayer, C. Meyer, S. K. Muppa, R. Neggers, E. Orlandi, Florian Pantillon, B. Pospichal, N. Röber, L. Scheck, A. Seifert, P. Seifert, F. Senf, P. K. Siligam, C. Simmer, S. Steinke, B. Stevens, K. Wapler, M. Weniger, V. Wulfmeyer, G. Zängl, Dan Zhang, J. Quaas   +60 more
semanticscholar   +1 more source

Ensemble-variational assimilation of statistical data in large-eddy simulation [PDF]

Physical Review Fluids, 2021
A non-intrusive data assimilation methodology is developed to improve the statistical predictions of large-eddy simulations (LES). The ensemble-variational (EnVar) approach aims to minimize a cost function that is defined as the discrepancy between LES ...
V. Mons, Yi Du, T. Zaki
semanticscholar   +1 more source

Application of FDS and firefoam in large eddy simulations of a turbulent buoyant helium plume [PDF]

, 2011
Large eddy simulations are conducted in the near-field region of a large turbulent buoyant helium plume. Such plumes are of relevance for fire safety research due to the similar flow features as in the buoyant (smoke) plumes above the fire source.
Maragkos, Georgios, Merci, Bart, Rauwoens, Pieter   +2 more
core   +1 more source

Large Eddy Simulation for Dispersed Bubbly Flows: A Review

International Journal of Chemical Engineering, 2013
Large eddy simulations (LES) of dispersed gas-liquid flows for the prediction of flow patterns and its applications have been reviewed. The published literature in the last ten years has been analysed on a coherent basis, and the present status has been ...
M. T. Dhotre, N. G. Deen, B. Niceno, Z. Khan, J. B. Joshi   +4 more
doaj   +1 more source

When can a high-resolution simulation over complex terrain be called LES?

Frontiers in Earth Science, 2015
The ceaseless rise of computational power leads to a continuous increase of the resolution of the numerical models of the atmosphere. It is found today that operational models are run at horizontal resolutions near 1 km whereas research exercises for ...
Joan eCuxart
doaj   +1 more source