Numerical study of turbulent pulsating flow in rectangular narrow channel with periodically mounted longitudinal vortex generators on one sidewall

The turbulent pulsating flow and heat transfer in a rectangular narrow channel with periodically mounted Longitudinal Vortex Generators (LVGs) on one sidewall was numerically investigated by solving three-dimensional unsteady elliptical Navier-Stokes equations. The standard k-ε turbulent model was adopted. The dynamic response of fluid outlet temperature and the heat transfer of the LVGs were numerically analyzed in a pulsating period, and it was further investigated by changing the frequency of the pulsating flow. It was found that the pulsating flow could enhance the heat transfer of LVGs when the pulsating frequency increasing, and then the heat transfer of LVGs was improved.