PIV measurement of turbulent bubbly mixing layer flow with polymer additives

Turbulent Bubbly Flow

Drag reduction in a flat-plate turbulent boundary layer flow by polymer additives

This paper presents a theoretical study on the velocity distribution and the friction factor of boundary layer flows with polymer additives starting from the concept of “stress deficit.” A novel method of order of magnitude analysis is developed, which converts the governing equations of boundary layer flow into a solvable ordinary differential equation, thus the total shear stress distribution...

A Study of Flow and Mixing in Bubbly Gas-Liquid Pipe Flow Generated by a Grid

The spreading of a tracer in a bubbly two-phase grid-generated turbulent flow system is studied. In this work both particle image velocimetry (PIV) and planer laser-induced <span style="font-size: 10pt...

Simultaneous 3-D Flow Visualization with 2-D PIV to Observe a Turbulent Boundary Layer

A high speed 3-D flow visualization system is synchronized with a 2-D particle image velocimetry (PIV) system to simultaneously capture instantaneous 3-D images with a 2-D PIV slice through the center of the measurement volume. Trials were performed on a zero pressure gradient (ZPG) turbulent boundary layer (Reθ ~ 4900) on the wall of a 2 ft x 2 ft open circuit wind tunnel. The experimental set...

Analysis of a turbulent jet mixing flow by using a PIV-PLIF combined system

Abs ract : In the present paper, the development of a high-resolution PIV-PLIF combined system for the simultaneous measurements of velocity and passive scalar concentration fields is described. The high-resolution PIV-PLIF combined system is used to perform the simultaneous whole-field measurements of velocity and concentration in the near field of a turbulent jet mixing flow. The characterist...