Results 11 to 20 of about 37,005 (263)
Spherical model for turbulence [PDF]
Physical Review Letters, 1993 A new set of models for homogeneous, isotropic turbulence is considered in which the Navier-Stokes equations for incompressible fluid flow are generalized to a set of N coupled equations in N velocity fields. It is argued that in order to be useful these models must embody a new group of symmetries, and a general formalism is laid out for their ...
, Mou, , Weichman
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CFD Analysis of Wind Distribution around Buildings in Low-Density Urban Community
Mathematics, 2022 The computational fluid dynamics (CFDs) models based on the steady Reynolds-averaged Navier–Stokes equations (RANSs) using the k−ω two-equation turbulence model are considered in order to estimate the wind flow distribution around buildings.
Nidhal Hnaien +6 more
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Astrophysical turbulence modeling [PDF]
Reports on Progress in Physics, 2011 The role of turbulence in various astrophysical settings is reviewed. Among the differences to laboratory and atmospheric turbulence we highlight the ubiquitous presence of magnetic fields that are generally produced and maintained by dynamo action.
Brandenburg, Axel, Nordlund, Åke
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Renormalization of the shell model of turbulence
Physical Review E, 2023 Renormalization enables a systematic scale-by-scale analysis of multiscale systems. In this paper, we employ \textit{renormalization group} (RG) to the shell model of turbulence and show that the RG equation is satisfied by $ |u_n|^2 =K_\mathrm{Ko} ε^{2/3} k_n^{-2/3}$ and $ ν_n = ν_* \sqrt{K_\mathrm{Ko}} ε^{1/3} k_n^{-4/3}$, where $k_n, u_n $ are the ...
Mahendra K. Verma, Shadab Alam
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CONFORMAL MODELS OF MAGNETOHYDRODYNAMIC TURBULENCE [PDF]
International Journal of Modern Physics A, 1996 Following the previous work of Ferretti and Yang on the role of magnetic fields in the theory of conformal turbulence, we show that nonunitary minimal model solutions to two-dimensional magnetohydrodynamics (MHD) obtained by dimensional reduction from three dimensions exist under different (and more restrictive) conditions.
Coceal, Omduth, Thomas, Steven
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Shuili Shuiyun Gongcheng Xuebao, 2019 In order to find a turbulence model suitable for numerical calculation of hydraulic performance of the siphon outlet conduit in a large-scale low-head pumping station, a transparent conduit model experiment method is used to conduct experimental studies ...
XU Lei +6 more
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Fluid-Solid Interaction Simulation Methodology for Coriolis Flowmeter Operation Analysis
Sensors, 2021 Numerical simulation is a widely used tool for Coriolis flowmeter (CFM) operation analysis. However, there is a lack of experimentally validated methodologies for the CFM simulation.
Evgeniia Shavrina +3 more
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Modelling the Dynamics of Turbulent Floods [PDF]
SIAM Journal on Applied Mathematics, 2003 Consider the dynamics of turbulent flow in rivers, estuaries and floods. Based on the widely used k-epsilon model for turbulence, we use the techniques of centre manifold theory to derive dynamical models for the evolution of the water depth and of vertically averaged flow velocity and turbulent parameters. This new model for the shallow water dynamics
Mei, Z., Roberts, A. J., Li, Zhenquan
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Transitional Behavior of a Flow Regime in Shoaling Tsunami Boundary Layers
Journal of Marine Science and Engineering, 2020 The transitional flow regime of the bottom boundary layer under hypothetical shoaling tsunamis is investigated in the entire region from the tsunami source to the shallow sea area.
Hitoshi Tanaka +2 more
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Atmosphere, 2022 The effects of different modeling and solving approaches on the simulation of a steam ejector have been investigated with the computational fluid dynamics (CFD) technique. The four most frequently used and recommended turbulence models (standard k-ε, RNG
Jingshu Xiao +7 more
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