The image shows a fluctuating wall pressure field beneath a transitional boundary layer measured with a 64-element linear array of microphones illustrating spatio-temporal formation, convection and growth of turbulent spots. For further information CLICK HERE.

Reference:

Snarski, S.R.,"Measurement and Modeling of the Fluctuating Wall Pressure Field Beneath a Transitional Boundary Layer," American Physical Society 54th Annual Meeting of the Division of Fluid Dynamics;, San Diego, CA, 18 Nov 2001.