A novel method of heating wind tunnel flows to strong thermal stratifications is described. Variable electric heating is employed to create user-selectable temperature profiles in steady, uniform mean flow. Linear temperature gradients of up to 200~ (V/iisfil~i frequencies of 2.5 rad s1) can be sustained. The performance of the facility is discussed in the context of continuouslystratified grid...

To investigate the feature of turbulence developing behind filter device in a current flow, flow fields at intermediate downstream distance an immersed grid open water channel are recorded using two-dimensional (2D) Particle Image Velocimetry (PIV) system. The measurements on series vertical and horizontal sections conducted to reveal stream-wise evolution depth diversity free surface flow. Unl...