RANS MODELING OF GAS JET IMPINGING ONTO A DEFORMABLE LIQUID INTERFACE

ةيضرلأا ةيبذاجلا ةوقو يحطسلا رتوتلا ةوق ريثأت نم لك يلع لمتشي يذلاو يروفانلا . تمدق دقو اذھ ماظنلا اذھ يف ثدحت يتلا ةدقعملا تاءارجلإل ديفم فيصوتو ةحضاو ةروص اھيلع لوصحلا مت يتلا جئاتنلا يروفانلا . The present paper introduces a numerical model for one of the most important fluid-fluid interaction problems in industrial engineering applications, mainly a gas jet impinging perpendicularly onto a liquid interface. The Reynolds-averaged conservation equations and the k-e turbulence model are coupled with the level set approach to describe the behavior of the jetting system governed by the gas and liquid flows. The RANS equations for both phases are described in the axisymmetric cylindrical coordinates and solved separately using the projection method on a non-staggered grid. The interfacial boundary conditions or jump conditions are applied at the interface of the two immiscible fluids. An improvement of the treatment of the convection term and interpolation method that was used to obtain the intermediate volume flux defined on the cell faces is presented. The topological changes of the interface are captured implicitly on the Eulerian grid by the zero level set function. The present algorithm showed a remarkable capability to handle the jetting system with high density ratio including the surface tension and gravity effects. The obtained numerical results provide useful insight and a better understanding to the highly complex flow encountered in such processes.