Feedback control´s impact on turbulent flow field

Because of the complex of turbulence, human has not understood it thoroughly. Computer technology is playing a more and more important role on turbulent study with the development of computer technology and computational fluid dynamics (CFD). This article uses large eddy simulation (LES), studies the turbulent flow and heat transfer, and inputs feedback control in turbulent flow field to enhance heat transfer. Comparative study on turbulent flow with feedback control and that without feedback control is carried out. The conclusions show that the feedback control has significant impact on turbulent flow characters such as velocity field, vorticity field, and heat transfer. Local changes of velocity field and vorticity field generate the enhancement of heat transfer.