PIV Investigation of the Bluff Body in Water

Surendaran Kathiresan

Master's thesis

Abstract:

The objective of this thesis is to analyse and compare the flow around cylindrical bluff bodies in a rectangular towing tank using the Particle Image Velocimetry Technique (PIV), in which the vector fields and relative properties are analysed. Water at room temperature is utilized as the fluid medium and glass spheres are used as the seeding particles to view the flow around the bodies. The fluid flows along a rectangular cross section with a length of 2 metres and the bluff bodies are placed 1.5 metre away from the entrance of the fluid with a honeycomb structure placed in the entrance to get a streamlined flow. The flow around bluff bodies are investigated for two Reynolds number with values 748.5 and 499, and have been analysed for properties like vortex shedding, flow separation region, etc.

Abstract:

The objective of this thesis is to analyse and compare the flow around cylindrical bluff bodies in a rectangular towing tank using the Particle Image Velocimetry Technique (PIV), in which the vector fields and relative properties are analysed. Water at room temperature is utilized as the fluid medium and glass spheres are used as the seeding particles to view the flow around the bodies. The fluid flows along a rectangular cross section with a length of 2 metres and the bluff bodies are placed 1.5 metre away from the entrance of the fluid with a honeycomb structure placed in the entrance to get a streamlined flow. The flow around bluff bodies are investigated for two Reynolds number with values 748.5 and 499, and have been analysed for properties like vortex shedding, flow separation region, etc.

Keywords

Bluff bodies, Particle Image Velocimetry, Reynolds number, Honeycomb

Language used: English

Date on which the thesis was submitted / produced: 3. 5. 2019

Thesis defence

• Supervisor: Ing. Petra Dančová, Ph.D.

Technical University of Liberec

Faculty of Mechanical Engineering

Master programme / field:
Mechanical Engineering / Machines and Equipment Design