Hydrodynamic flow visualization

• Grant number: 14/07322-6
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: July 01, 2014
• End date: February 28, 2015
• Field of knowledge: Engineering - Mechanical Engineering - Transport Phenomena
• Principal Investigator: Edson Del Rio Vieira
• Grantee: Rodrigo Alves Faganello
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil

Abstract

Flow visualization techniques have been useful tools for understanding the complex phenomena associated to flow movement. Utilizing only the visual observation, LEONARDO DA VINCI made beautiful sketches about waves, free jets and bluff bodies wakes. Other famous fluid dynamics researchers - BERNOULLI, PASCAL, REYNOLDS, PRANDTL e ROSHKO - also used flow visualization. Nowadays, experimental flow visualization remains an important research toll. In the present work, an experimental study of the flow around elliptical cylinders with several slender ratios has been carried out in several flow regimes. All tests have been performed out in a vertical low turbulence hydrodynamic tunnel. Direct injection of liquid dye and aspersing of solid micro particles flow visualization techniques have been utilized. The flow images captured permit to identify several coherent flow structures, recirculations and boundary layer detachments.