Results 81 to 90 of about 3,071,655 (192)

First and Second Order Turbulence Closures Applied to Homogeneous Turbulent Bubbly Flows

Journal of Applied Fluid Mechanics, 2019
First and second turbulence models for turbulent bubbly flows are implemented in the CFD code. In the second order turbulence closure, the Reynolds stress tensor of the continuous phase is split into two parts: a turbulent part produced by the gradient ...
F. Chaibina, G. Bellakhal, J. Chahed
doaj  

Aircraft Dynamic Modeling in Turbulence [PDF]

, 2012
A method for accurately identifying aircraft dynamic models in turbulence was developed and demonstrated. The method uses orthogonal optimized multisine excitation inputs and an analytic method for enhancing signal-to-noise ratio for dynamic modeling in ...
Cunninham, Kevin, Morelli, Eugene A.
core  

Strategies for Enhancing One-Equation Turbulence Model Predictions Using Gene-Expression Programming

Fluids
This paper introduces innovative approaches to enhance and develop one-equation RANS models using gene-expression programming. Two distinct strategies are explored: overcoming the limitations of the Boussinesq hypothesis and formulating a novel one ...
Tony Di Fabbio, Yuan Fang, Eike Tangermann, Richard D. Sandberg, Markus Klein   +4 more
doaj   +1 more source

Turbulence modeling for compressible flows [PDF]

, 1977
Material prepared for a course on Applications and Fundamentals of Turbulence given at the University of Tennessee Space Institute, January 10 and 11, 1977, is presented. A complete concept of turbulence modeling is described, and examples of progess for
Marvin, J. G.
core  

Quantifying finite range plasma turbulence [PDF]

Turbulence is a highly non-linear process ubiquitous in Nature. The nonlinearity is responsible for the coupling of many degrees of freedom leading to an unpredictable dynamical evolution of a turbulent system.
Leonardis, Ersilia
core  

Comparison of new RANS-LES hybrid methods on a tandem cylinder problem using rough meshes

Applied and Computational Mechanics
Detached eddy simulation (DES), delayed DES (DDES) and improved DDES (IDDES) hybrid RANS-LES turbulence models based on the Menter’s Shear Stress Transport (SST) model as well as the DES variant of the Kok's Turbulent/Non-Turbulent model (TNT), Extra ...
Hájek L., Karel J., Klı́ma M., Trdlička D.   +3 more
doaj   +1 more source

HYDRODYNAMIC INTERACTION OF TWO PARALLEL PIPELINES WITH SMALL INTERPIPE DISTANCES

Мелиорация и гидротехника
Purpose: to determine the effect of small interpipe distances (1D–4D) on the flow structure and hydrodynamic loads while flowing round two parallel pipelines. Materials and methods.
Dmitry Yu. Sherstnev, Yulia V. Bryanskaya   +1 more
doaj   +1 more source

An Iterative Data‑Driven Approach to Turbulence Modeling Through Reynolds Force

Nanjing Hangkong Hangtian Daxue Xuebao
To improve the predictive accuracy of Reynolds-averaged Navier-Stokes （RANS） models for complex flows such as separation and secondary flows， a data-driven approach is used to correct RANS predictions.
ZHANG Jiaao, GU Yiyang, DONG Hao, XIA Tianyu   +3 more
doaj   +1 more source

Smagorinsky constant in LES modeling of anisotropic MHD turbulence

, 2008
Turbulent fluctuations in magnetohydrodynamic (MHD) flows can become strongly anisotropic or even quasi-2D under the action of an applied magnetic field. We investigate this phenomenon in the case of low magnetic Reynolds numbers.
Vorobev, Anatoliy, Zikanov, Oleg
core   +1 more source

Capturing Turbulence with Numerical Dissipation: A Simple Dynamical Model for Unresolved Turbulence in Hydrodynamic Simulations

The Astrophysical Journal Supplement Series
Modeling unresolved turbulence in astrophysical gasdynamic simulations can improve the modeling of other subgrid processes dependent on the turbulent structure of gas: from flame propagation in the interiors of combusting white dwarfs to star formation ...
Vadim A. Semenov
doaj   +1 more source