A novel volume of fluid (VoF) model called explicit diffusion (EVD) is developed for the simulation interfacial flows, including those with turbulence and primary spray atomization. It derived by averaging VoF equations over an explicit, physically-defined length scale. Fluctuations at sub-volume scales, which can arise due to interface dynamics or turbulence, are attenuated process their effec...

Laminar flows involving chemical reactions play an important role in many practical applications. In this work a three-dimensional simulation dedicated to solving the Navier-Stokes equations in the low-Mach number limit is presented, using detailed chemistry and detailed transport. A complex three-dimensional configuration of a laminar methane/air burner is considered. Thanks to efficient numer...

The airflow in the modeled glottal constriction was simulated by the solutions of the Navier-Stokes equations for laminar flow, and the corresponding Reynolds equations for turbulent flow in generalized, nonorthogonal coordinates using a numerical method. A two-dimensional model of laryngeal flow is considered and aerodynamic properties are calculated for both laminar and turbulent steady flows...

In this paper, we present experimental investigation of convective heat transfer characteristic in the inner tube fluid of miniature concentric double tube Hair-pin heat exchanger with constant heat flux. This work is carried out for distilled water and a mixture of distilled water and ethylene glycol (10%, 20% and 25% by volume) as heat transfer cold fluid flowing in inner tube to carry away h...

Abstract Aim of this paper is the enhancement scalar transport (heat, chemical species) in flow systems with reorientations a laminar base flow. Conventional heating/mixing protocols comprise temporal or spatial periodic these flows to promote fluid mixing. However, thermal homogenisation rates fields are not necessarily accelerated approaches due substantial effect diffusion and/or reactions o...

In the paper, a new construction of compact plate heat exchanger dedicated to PVT cooling was numerically tested. The efficiency photovoltaic panels decreases as their temperature increases, but improves efficiency. A model counter-current with rectangular minichannels presented. heated wall cell. There were laminar flows Fluorinert FC-72 and distilled water in minichannels. by panel. CAD minic...

Fluid flow around bluff bodies occurs in numerous fields of science and engineering, such as flows pass vehicles, cables, towers and bridges. These flows have been studied experimentally and numerically for the last several decades. The investigation of flow around high-speed trains is an important application of bluff bodies. Fluid flow, aerodynamic forces and moments, separation and wake regi...

A fluid-mechanical model is developed for the float-polishing process. In this model laminar flow between the sample and the lap results in pressure gradients at the grooves that support the sample on a fluid layer. The laminar fluid motion also produces supersmooth, damage-free surfaces. Quartz substrates for applications in high-stress environments were float polished, and their surfaces were...

The purpose of this study is to analyse the transport and stirring of fluid that occurs owing to the formation and growth of a laminar vortex ring. Experimental data was collected upstream and downstream of the exit plane of a piston–cylinder apparatus by particle-image velocimetry. This data was used to compute Lagrangian coherent structures to demonstrate how fluid is advected during the tran...

this paper presents the results of numerical simulations of the laminar and turbulent flows inside diverging channels using random vortex methods (rvm). random vortex method is a mesh-free method which solves unsteady vorticity equation instead of solving navier-stokes equations directly to determine the velocity field. in this paper, the velocity potential, which is used as the initial conditi...