This paper presents numerical simulations of two-phase flow with highdensity ratio, taking into account mass transport of a soluble component and its interfacial mass transfer. The mathematical model and the numerical method allow for different solubility of the species in the respective fluid phases, while volume changes due to mass transfer are neglected. The discontinuous changes in species ...

Based on the volume of fluid method (VOF), rising characteristics bubbles in near-wall static water are studied. In this study, influence wall motion bubble was studied by changing distance wall, diameter bubble, arrangement and size ratio, etc. The is expressed as average swing amplitude “Z”-shaped when rises. study found that case a single surface has certain rise its degree affected diameter...

Article history: Received 17 December 2007 Received in revised form 23 September 2009 Accepted 3 December 2009 Available online 14 December 2009

There are different methods to reduce drag in high speed hulls. One of these methods is a change in the shape of the body by adding longitudinal side tunnels. In this paper it has been attempted to determine the influence of the tunnel height on hydrodynamic characteristics of the hull to achieving an optimum shape for the tunnel. To achieve this purpose, numerical simulation of the problem has...

This second part of our research explores the kinematic aspect fine-scale bubble-induced turbulence (BIT) to (i) present effect bubble breakup and coalescence (ii) compare it against universal characteristics reported in literature. To this end, we simulate a dilute bubbly system 0.5% void fraction using two distinct numerical simulations. In volume-of-fluid (VoF) simulation, bubbles undergo co...

Surface wave dynamics of vertical falling films under monochromatic-frequency flowrate-forcing perturbations is computed by the direct simulation of Navier–Stokes equations using the Volume of Fluid (VOF) method to track free surfaces and the Continuum Surface Force (CSF) model to account for dynamic boundary conditions at free surfaces. The numerical VOF–CSF model is completely formulated, and...

Processes utilizing various spraying cooling are widely used in many gas treatment applications. Effective spray cooling system design optimization often depends on the approach used to investigate such gas cooling problems. The mass transfer efficiency of spray cooling problems depends on the ability of the liquid to atomize and disperse into the gas by interacting in a controlled manner. Expe...