Drag Reduction via Phase Randomization in Turbulent Pipe Flow


Tugluk O., Tarman H. I.

European Conference on Numerical Mathematics and Advanced Applications (ENUMATH), Ankara, Turkey, 14 - 18 September 2015, vol.112, pp.463-470 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 112
  • Doi Number: 10.1007/978-3-319-39929-4_44
  • City: Ankara
  • Country: Turkey
  • Page Numbers: pp.463-470

Abstract

In this study, possibility of reducing drag in turbulent pipe flow via phase randomization is investigated. Phase randomization is a passive drag reduction mechanism, the main idea behind which is, reduction in drag can be obtained via distrupting the wave-like structures present in the flow. To facilitate the investigation flow in a circular cylindrical pipe is simulated numerically. DNS (direct numerical simulation) approach is used with a solenoidal spectral formulation, hence the continuity equation is automatically satisfied (Tugluk and Tarman, Acta Mech 223(5): 921-935, 2012). Simulations are performed for flow driven by a constant mass flux, at a bulk Reynolds number (Re) of 4900. Legendre polynomials are used in constructing the solenoidal basis functions employed in the numerical method.