Jafar Chapokpour - Department of Irrigation Engineering, Faculty of Agricultural Technology and Engineering, UTCAN, University of Tehran, Iran
Firouz Ghasemzadeh - Department of Irrigation Engineering, Faculty of Agricultural Technology and Engineering, UTCAN, University of Tehran, Iran
Javad Farhoudi - Department of Irrigation Engineering, Faculty of Agricultural Technology and Engineering, UTCAN, University of Tehran, Iran

In this paper a numerical investigation is given for a Rankine type vortex flow inside the cylindrical vortex chamber using FLOW-3D. The FLOW-3D is a general purpose computational fluid dynamics (CFD)package. The fluid motion is described with non-linear, transient, second-order differential equations.Additionally the free surface also exists in many simulations carried out with FLOW-3D because flow parameters and materials properties, such as density, velocity and pressure experience a discontinuity at it. After analysis of the vortex by mentioned details, the finding of time-averaged velocity components, turbulentcomponents, turbulence dissipation, in the 2D briefed sections of chamber were depicted. It was found thatthere are different flow patterns like clockwise/anticlockwise vortices and some sink points combined with each other in different time intervals, decaying and generating along the time. Also the turbulence intensity and dissipations around the boundary conditions of chamber like central flushing discharge are higher than the flowbody. It was also found that this CFD package was not able to simulate thoroughly the central air core of chamber after filling of chamber. This analysis is validated by comparison with previous experimental data that was measured in vortex settling basin

Vortex flow; Flow 3D; Numerical Investigation; Turbulence