"Skin-friction and vorticity fields in wall-bounded flows and the attached eddy hypothesis" by Prof. M.S. Chong

Date :      September 7^th 9^th (Thu), 2017

Time:      2:00pm – 3:00pm

Venue:    D015 (Lab1, Level D)
Speaker:  Prof. M.S. Chong (University of Melbourne)

Title: 
Skin-friction and vorticity fields in wall-bounded flows and the attached eddy hypothesis                             

Abstract:

The invariants of the velocity gradient tensor have been used to study turbulent flow structures in order to extract information regarding the scales, kinematics and dynamics of these structures. These invariants cannot be used to study structures at a no-slip wall since they are all zero at the wall. However, the flow structures at the wall can be  studied in terms of the invariants of the “no-slip tensor”. Employing surface flow patterns generated using local solutions of the Navier-Stokes equations, the relationship between the surface skin-friction field and vorticity field will be explored. These local solutions, together with data from the Direct Numerical Simulations of channel flows,  pipe flows and boundary layer flows may perhaps lead to a better model for the structure of attached eddies in wall bounded flows.

We look forward to seeing many of you at the seminar.