Open Science Research Excellence
@article{(International Science Index):http://waset.org/publications/11403,
  title    = {DNS of a Laminar Separation Bubble},
  author    = {N. K. Singh and  S. Sarkar},
  country   = {India},
  institution={National Institute of Technology},
  abstract  = {Direct numerical simulation (DNS) is used to study the evolution of a boundary layer that was laminar initially followed by separation and then reattachment owing to generation of turbulence. This creates a closed region of recirculation, known as the laminar-separation bubble. The present simulation emulates the flow environment encountered in a modern LP turbine blade, where a laminar separation bubble may occur on the suction surface. The unsteady, incompressible three-dimensional (3-D) Navier-Stokes (NS) equations have been solved over a flat plate in the Cartesian coordinates. The adverse pressure gradient, which causes the flow to separate, is created by a boundary condition. The separated shear layer undergoes transition through appearance of ╬ø vortices, stretching of these create longitudinal streaks. Breakdown of the streaks into small and irregular structures makes the flow turbulent downstream.
},
    journal   = {International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering},  volume    = {5},
  number    = {9},
  year      = {2011},
  pages     = {1757 - 1761},
  ee        = {http://waset.org/publications/11403},
  url       = {http://waset.org/Publications?p=57},
  bibsource = {http://waset.org/Publications},
  issn      = {eISSN:1307-6892},
  publisher = {World Academy of Science, Engineering and Technology},
  index     = {International Science Index 57, 2011},
}