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vortexThe sequence of images to the left visualizes a vortical motion formed when a laminar flat plate boundary layer is perturbed by rotating a circular patch of the bounding surface.  The ensuing motion is a hairpin-like vortex. The “head” (most downstream portion) of this vortex has a sign of vorticity that is opposite to that in the approaching boundary layer.  It is also relevant to note the geometric and kinematic asymmetries associated with the “legs” of this motion.  Specifically, one leg (a) is elevated off the floor and is comprised of a purely rotational-like motion, while the other leg (b) resides much closer to the floor and is much more like a shearing motion.  More details may be found in the paper by Klewicki and Hill (2003) below.

Recent publications in the Center for Fluid physics

Referreed Journal Publications (arranged in alpha order by author)

  1. G. P. Chini, "Strongly nonlinear Langmuir circulation and Rayleigh--Benard convection", submitted to the Journal of Fluid Mechanics (2006).
  2. G. P. Chini, "Resonant Langmuir-circulation--internal-wave interaction.  Part 2.  Langmuir circulation instability", Journal of Fluid Mechanics (2005), Vol. 524, pp. 99--120.
  3. G. P. Chini & S. Leibovich, "An analysis of the Klemp & Durran radiation boundary condition as applied to dissipative internal waves", Journal of Physical Oceanography (2003), Vol. 33, pp. 2394--2407.
  4. Y. Dubief, C. M.White, V. E. Terrapon, E. S. G. Shaqfeh, P. Moin, & S. K. Lele, 2004 On the coherent drag-reducing and turbulence-enhancing behaviour of polymers in wall flows. J. Fluid Mech. 514, 271-280, 2004.
  5. P. Fife, T. Wei, J. Klewicki and P. McMurtry, “Stress Gradient Balance Layers and Scale Hierarchies in Wall-Bounded Turbulent Flows” J. Fluid Mech., 532 2005, 165.
  6. P. Fife, J. Klewicki, P. McMurtry and T. Wei, “Multiscaling in the Presence of Indeterminacy: Wall-Induced Turbulence,” Multiscale Modeling and Simulation, 4 2005, 936.
  7. O. E. Jensen, G. P. Chini & J. R. King, "Thin-film flows near isolated humps and interior corners", Journal of Engineering Mathematics (2004), Vol. 50, pp. 289--309.
  8. J. Klewicki and R. Hill,  “Laminar boundary layer response to rotation of a finite diameter surface patch” Phys. Fluids 15, 2003, 101.
  9. J. Klewicki, “Mean Momentum Balance: Implications for Turbulence Control,” in NUS-IMS Workshop on Transition and Turbulence Control (Volume 8), Lecture Note Series, National University of Singapore, Singapore, 283, 2006.
  10. J. Klewicki, P. Fife, T. Wei and P. McMurtry, “A Physical Model of the Turbulent Boundary Layer Consonant with Mean Momentum Balance Structure,” Proc. Roy. Soc. Lond. 365, 2007, 823.
  11. J. Klewicki, P. Fife, T. Wei and P. McMurtry, “Overview of a Methodology for Scaling the Indeterminate Equations of Wall Turbulence,” AIAA J. 44, 2006, 2475.
  12. P. Priyadarshana, J. Klewicki, S. Treat and J. Foss “Statistical Structure of Turbulent Boundary Layer Velocity-Vorticity Products at High and Low Reynolds Numbers,” J. Fluid Mech. 570, 2007, 307.
  13. R. Sadr and J. Klewicki, “Flow Field Characteristics in the Near-Field Region of Particle Laden Coaxial Jets,” Experiments in Fluids, 39 2005, 885.
  14. T. Wei, P. Fife, J. Klewicki and P. McMurtry, “Scaling Heat Transfer in Fully Developed Turbulent Channel Flow,” International Journal of Heat and Mass Transfer, 48 2005, 5284.
  15. T. Wei, P. Fife, J. Klewicki and P. McMurtry, “Properties of the Mean Momentum Balance in Turbulent Boundary Layer, Pipe and Channel Flows,” J. Fluid Mech., 522, 2005, 303.
  16. T. Wei, P. Fife and J. Klewicki, “On Scaling the Mean Momentum Balance and its Solutions in Turbulent Couette-Poiseuille Flow,” J. Fluid Mech 573, 2007, 371.
  17. T. Wei, P. McMurtry, J. Klewicki and P. Fife, “Mesoscaling of the Reynolds Shear Stress in Turbulent Channel and Pipe Flows” AIAA J., 43 2005, 2350.
  18. C. M. White, V. S. R. Somandepalli, Y. Dubief & M.G. Mungal "Dynamical contributions to the skin friction in polymer drag reduced wall-bounded turbulence" submitted Phys. Fluids, 200
  19. C. M. White, V.S.R. Somandepalli & M.G. Mungal "The turbulence structure of drag reduced boundary layer flow" Exp. Fluids 36, 62-69, 2004.

 

Book Chapters

J. Klewicki, “Mean Momentum Balance: Implications for Turbulence Control,” in NUS-IMS Workshop on Transition and Turbulence Control (Volume 8), Lecture Note Series, National University of Singapore, Singapore, 283, 2006.