Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Numerical study of the velocity field predicted downstream a jet in cross flow using linear and non-linear turbulence models
Submission Author:
Kelvin Cristófalo de Morais , MG , Brazil
Co-Authors:
Kelvin Cristófalo de Morais, Luis Santos, Claudia Andrade
Presenter: Kelvin Cristófalo de Morais
doi://10.26678/ABCM.COBEM2019.COB2019-1939
Abstract
A numerical study of a jet in a cross stream has been carried to investigate the accuracy of standard linear and non-linear turbulence models in predicting the flow field for a jet in cross flow. A mesh dependence study was performed for hexahedral and hybrid meshes in 3 levels of global refinement and an important influence of the velocity ratio and mesh topology was found in the grid convergence behavior. An earlier work with a heated jet in cross flow showed a great improvement in the numerical temperature field using a non-linear turbulence model. In this work, the same turbulence models were tested for an unheated jet and the velocity profiles were compared to experimental data. However, only a slight improvement was noticed using the non-linear turbulence model. Current RANS models fail in predicting the development of the jet in the cross stream.
Keywords
CFD, Reynolds averaged Navier Stokes(RANS), Plumes and jets in crossflow
