Transient three-dimensional predictions of turbulent flows in cylindrical and cartesian coordinate systems

A primitive, pressure-velocity variable, finite difference code was developed to predict turbulent three dimensional transient flows in cylindrical and cartesian coordinates. Three applications of the code are considered: local destratification near the release structure of a reservoir, deflection of a jet entering normally into a uniform crossflow, and dilution jets in gas turbine combustors. The prediction procedure is based on the transient two dimensional SOLA technique (for laminar flows), which is a finite difference scheme based on the Marker and Cell Methods. The procedure incorporates displaced grids for the three velocity components, which are placed between the nodes where pressure and other variables are stored. The pressure is deduced from the continuity equation and the latest velocity field, using a pressure-velocity iteration procedure. The developed three dimensional turbulent computer code is shown to be a simplified yet effective prediction procedure for use by persons with little or no experience in computational fluid dynamics.