Flow Field and Heat Transfer in an impingement Synthetic Jet: Application of Different Turbulence Models

In the present paper, capabilities of three different turbulence models, namely Abid low Reynolds number k -ε , SST / k k -ε andv2-ƒ 2 f , for simulation of unsteady flow field and heat transfer of a threedimensional impinging synthetic jet on a constant temperature copper surface at Re of 2100, frequency of 80 Hz and impinging distance of H/ D = 3 are investigated. For more accurate simulation of a synthetic jet diaphragm, the dynamic mesh approach is employed. The problem is solved under assumptions of incompressible flow, symmetric and temperature dependent properties. The PISO algorithm is used for coupling continuity and momentum equations. Present results demonstrate thatthe v2 f turbulence model provides the best prediction accuracy amongst the turbulence models in all areas of hot surface. In addition, in center of hot surface, the SST / k -ε turbulence model displays more accurate results than the low Re k -ε turbulence model.

کلیدواژه ها:

impinging synthetic jet ، turbulence modeling ، heat transfer ، dynamic mesh ، oscillatory flow