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Single Stream Shear Layer(SSSL)

 

The “World’s Largest Single Stream Shear Layer” facility has been designed to study the fundamental properties of this canonical turbulent free shear flow. The high and low speed bounding flows are delivered to the active shear layer with negligible vorticity. Hence, the MSU four-sensor transverse vorticity probe can be used to identify the vortical/non-vortical states that fundamentally define the interior/exterior domains with respect to the viscous superlayer. This fundamental study of intermittency is supported by the NSF. The SSSL facility was built by S.C. Morris (PhD 2002). His thesis has documented the basic processes wherein a high Re turbulent boundary layer transitions to a single stream shear layer.

The large opening for the primary flow of the SSSL (1m x 2m) can be modified to a 1m x 1m area such that the TSFL developed, DFTI product (Thermal Transient Anemometer, TTA) can be calibrated in a uniform flow.

 

  • Morris, S. C., and Foss, J. F. 2003. "Turbulent Boundary Layer to Single-Stream Shear Layer: The Transition Region." Journal of Fluid Mechanics. 494: 187-221.
  • Morris, S. C. 2002. Ph.D. Thesis. The Velocity and Vorticity Fields of a Single Stream Shear Layer.
  • Hellum, A. R. 2006. Masters Thesis. Intermittancy and the Viscous Superlayer in a single Stream Shear Layer.

 

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Entrainment fans
Back view of the SSSL
Inside the SSSL
Inside the SSSL

Hellum, A.R. 2006. Intermittency and the Viscous Superlayer in a Single Stream Shear Layer.

Morris, S.C., and Foss, J.F. 2003. Turbulent Boundary Layer to Single-Stream Shear Layer: The Transition Region. Journal of Fluid Mechanics. 494: 187-221.

Morris, S.C., Foss, J.F., and Hellum, A.R. 2003. Velocity-Vorticity Decomposition of the
Reynolds Stress Gradient in a Shear Layer.

Morris, S.C., and Foss, J.F. 2003. The Non Self Similar Scaling of Vorticity in a Shear Layer.