the design and optimization of hydrocyclones using cfd techniques are gaining popularity and the key to a successful simulation lies with the accurate description of the high turbulent swirling behavior of the flow. this paper presents a detailed comparison between the omega rsm and the rng k–e turbulence model, which are both derived specially for modeling swirling or rotational flow, in the s...

in this study, the dispersion mechanisms of aerosols suspended in a turbulent plane channel flow is investigated using a novel numerical approach. a turbulent channel flow is simulated by a direct numerical simulation (dns) method, for which no-slip boundary conditions are assumed at the top and bottom walls, while periodicity conditions are applied on the other sides. dns, in particular, allow...

the current study presents the results of the aerodynamic noise prediction of the flow field around a naca 0012 airfoil at a chord-based reynolds number of 100,000 and at 8.4 degree angle of attack. an incompressible large eddy simulation (les) turbulence model is applied to obtain the instantaneous turbulent flow field. the noise prediction is performed by the ffowcs williams and hawkings (fw-...

We consider the effects of distributed roughness on the boundary-layer transition over a rotating disk using both theoretical and experimental approaches. The theoretical approach further develops Yoon et al.’s method [Int. J. Heat Fluid Flow, 28, p262 (2007)] for obtaining the steady-flow solutions for a general surface distribution function. Full threedimentional stability analyses are conduc...

The statistical behaviors of mean enstrophy and its evolution during head-on interaction premixed flames propagating toward a chemically inert flat wall across the turbulent boundary layer have been analyzed using direct numerical simulations for friction velocity-based Reynolds number [Formula: see text]. dynamics both isothermal adiabatic thermal conditions. contributions vortex-stretching vi...

A novel computational methodology, termed “Irregularly Portioned Lagrangian Monte Carlo-Finite Difference” (IPLMCFD) is developed for large eddy simulation (LES) of turbulent flows. This methodology is intended for use in the filtered density function (FDF) formulation and is particularly suitable for simulation of chemically reacting flows on massively parallel platforms. The IPLMCFD facilitat...

This article presents the results of numerical simulation that evaluates influence spray angle gasoline (С6Н6) in combustion chamber on temperature distribution and formation carbon dioxide concentration. The purpose this work is to study initial parameters process liquid fuel using based solution two-dimensional differential equations turbulent reacting flow. studies were carried out at 20-160...

Introduction Boundary layer development in supersonic The intended application for this study is to further the understanding of the flow reacting flows is not well understood. A new capability has been developed which makes through the combustor of a scramjet (supermore extensive surface measurements practisonic combustion ramjet) engine. Experical, leading to an increased understanding of men...