Results 11 to 20 of about 12,827 (260)
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
openaire +2 more sources
Can turbulence within the field of view cause significant biases in radiative transfer modeling at the 183 GHz band? [PDF]
Atmospheric Measurement Techniques, 2018 The hypothesis whether turbulence within the passive microwave sounders field of view can cause significant biases in radiative transfer modeling at the 183 GHz water vapor absorption band is tested.
X. Calbet +8 more
doaj +1 more source
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
openaire +4 more sources
Data-Driven Transition Models for Aeronautical Flows with a High-Order Numerical Method
Aerospace, 2022 Over the past years, there has been innovative ideas about data-driven turbulence modeling proposed by scholars all over the world. This paper is a continuity of these significant efforts, with the aim of offering a better representation for turbulence ...
Yanjun Chen, Shengye Wang, Wei Liu
doaj +1 more source
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
openaire +3 more sources
Учёные записки Казанского университета: Серия Физико-математические науки, 2020 The effect of the scale and the high intensity of incident-flow turbulence in a boundary layer on a smooth plane plate with rounded edge (experiment T3H) under a zero pressure gradient was analyzed.
V.M. Zubarev
doaj +1 more source
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
openaire +2 more sources
An analytical turbulence modeling based on the double-Lagrangian formalism
Journal of Fluid Science and Technology, 2019 An analytical approach to turbulence modeling based on the double-Lagrangian formalism is applied to turbulence modeling. Extending a selfconsistent closure theory of homogeneous turbulence, current approach allows us to derive a quadratic nonlinear ...
Taketo ARIKI
doaj +1 more source
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
openaire +4 more sources
“Equilibrium” and “non-equilibrium” turbulence
Theoretical and Applied Mechanics Letters, 2017 We review the concept of “equilibrium” in turbulence. It generally means a property of the energy spectrum, it can also be understood in terms of a scalar property, the Taylor–Kolmogorov formula relating the dissipation rate to the total energy and ...
Robert Rubinstein, Timothy T. Clark
doaj +1 more source