Author(s)

Ryuhei Yamaguchi^1*, Gaku Tanaka¹, Hao Liu¹, Toshiyuki Hayase²

¹Graduate School of Engineering, Chiba University, Chiba, Japan.
²Institute of Fluid Science, Tohoku University, Sendai, Japan.

A T-junction is a fundamental fluid element prevalent in pipe networks of water supplies and power plants. In the present study, a double T-junction was investigated for flow instability and fluid vibration. Both axi-aligned and skewed double T-junctions are examined from viewpoint of flow instability. With single-phase flow in an open-ended double T-junction, fluid vibration is induced in both side branches because of a high shear rate with a point of inflection. The frequency of vibration in the downstream branch is higher than that in the upstream branch. Except for the upstream branch in the skewed double T-junction, the frequency is higher than that in a single T-junction. The fluid vibrations are closely associated with the fluid interference created by the presence of the two side branches.

Fluid Vibration, Flow Instability, Shear Rate, Double T-Junction, Particle Image Velocimetry, Laser Doppler Anemometry

Yamaguchi, R. , Tanaka, G. , Liu, H. and Hayase, T. (2016) Fluid Vibration Induced in T-Junction with Double Side Branches. World Journal of Mechanics, 6, 169-179. doi: 10.4236/wjm.2016.64014.