Heat transfer response of an isothermal cylinder to fluctuating cross flow

The unsteady heat transfer from an isothermal circular cylinder in fluctuating cross flow is simulated numerically, for the case where the amplitude of the oscillating velocity is small compared with the mean velocity. By solving the linear perturbation equations derived from the unsteady full Navier-Stokes and the energy equations, the amplitude and the phase of heat transfer response are obtained in the range of Reynolds number Re<40. The effects of the velocity, the cylinder radius and frequency on the response are expressed graphically in terms of the normalized velocity and the cylinder radius. (Author)