抄録
In order to understand dynamics of low-frequency fluctuation of centerline velocity in plane turbulent Couette flow, Proper Orthogonal Decomposition (POD) is applied to the streamwise velocity profile in the wall-normal direction to obtain the empirical orthogonal function. Instantaneous velocity profile was obtained by rake of 9ch hot wire anemometry. The 1st and 3rd modes are responsible to velocity fluctuation at the centre of the channel. Dynamical model is formulated using the POD eigenfunctions to project a simplified Navier-Stokes equation onto POD modes, since only single component of velocity was measured. We will report the performance of low-dimensional POD-based dynamical model in the meeting.
