Advertisement

Experimental Studies Involving Flow Visualization Over Non-circular Geometries

  • Saisarath KruthiventiEmail author
  • Subbarao Rayapati
  • Sai Nikhil
  • Manideep
Conference paper

Abstract

Vortex dynamics plays a vital part in the transport of mass, momentum and energy of a flow field. Vortex manipulation is the way out for controlling any device that involves mixing of flow. In the present study, the size of recirculation zone behind the various non-circular geometries and various square blocks of different thicknesses 4, 6 and 8 mm is visualized. The physics behind the wake zone size manipulation for different Reynolds numbers is also investigated. Flow separation and reattachment points and distance of reverse flow for various geometries are observed and illustrated. Work is further extended for flow visualization over forward, backward and combined steps. Experimental analysis is done by using an open channel setup, which is fabricated to designed dimensions. Drag force and the coefficient of drag for various geometries with different set of inclinations (90° and 30 °) and at various Reynolds numbers are calculated. Plots are made between various Reynolds numbers and coefficient of drag, pressure uphill, reverse flow length and are analyzed with respect to different flow features.

Keywords

Coefficient of drag Drag force Flow visualization Separation point Vortex dynamics 

References

  1. Chen, Q., Ronald, J.A., Zhong, Q, Li, D., Wang, Xi.: Experimental study on the role of spanwise vorticity and vortex filaments in the outer region of open-channel flow. J. Hydraul. Res. 52(4), 476–489 (2014)Google Scholar
  2. Konstantinidis, E., Balabani, S.: Symmetric vortex Shedding in the near wake of a circular cylinder due to stream wise perturbations. Journal of Fluid Structure 23, 1047–1063 (2007)CrossRefGoogle Scholar
  3. Nezu, I., Rodi, W.: Open-channel flow measurements with a laser Doppler anemometer. J. Hydraul. Eng. 112(5), 335–355 (1986)CrossRefGoogle Scholar
  4. Nezu, I., Sanjou, M.: PIV and PTV measurements in hydro-sciences with focus on turbulent open-channel flows. J. Hydro-environ. Res. 5(4), 215–230 (2011)CrossRefGoogle Scholar
  5. Prasad, A., Williamson, C.H.K.: The instability of the shear layer separating form a bluff body. J. Fluid Mech. 333, 375–402 (1997)CrossRefGoogle Scholar
  6. Rathakrishnan, E.: Visualization of the flow field around a flow plate. Instrum. Measur. Mag. IEEE 15(6), 8–12 (2012)CrossRefGoogle Scholar
  7. Takama, Y., Suzuki, K., Rathakrishnan, E.: Visualization and size measurement of vortex shed by flat and arc plates in an uniform flow. Int. Rev. Aerosp. Eng. 1(1), 55–60 (2008)Google Scholar

Copyright information

© Springer Science+Business Media Singapore 2016

Authors and Affiliations

  • Saisarath Kruthiventi
    • 1
    Email author
  • Subbarao Rayapati
    • 2
  • Sai Nikhil
    • 1
  • Manideep
    • 1
  1. 1.K.L. UniversityGunturIndia
  2. 2.NITTTR KolkataKolkataIndia

Personalised recommendations