Non-staggered Grid System Research Articles

Computation of turbulent conical diffuser flows using a non-orthogonal grid system

Abstract An algebraic Reynolds stress (ASM) turbulence model using a simplified pseudo-viscosity is incorporated with a non-orthogonal and non-staggered grid system using Cartesian velocity components with finite volume discretization. The accuracy and robustness of the method is shown by the prediction of complex turbulent flows in 8° and 20° included angle conical diffusers, with and without swirl. Both the ASM and the k - ϵ turbulence models predict the mean velocities accurately, while the ASM turbulence model gives better predictions of the Reynolds stresses than the k - ϵ turbulence model.

Finite Volume Computation Of Internal Turbulent Flows Promoted By Wind Action And Heat Release Employing A 3D Nonorthogonal Collocated Grid System

A general numerical method for the solution of the complete 3D averaged Navier-Stokes equations is presented. This method uses nonorthogonal co-ordinates, Cartesian velocity components and a pressure-velocity-coupling algorithm suitable for nonstaggered grid systems. A k-e two-equation turbulence model is used with this method to calculate the turbulent flow inside a heated space in communication with the outside environment through two small ventilation openings.