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SUMMARY:Time dependence of correlation functions in homogeneous and isotro
 pic turbulence - Prof Leonie Canet\, Grenoble
DTSTART:20190305T130000Z
DTEND:20190305T140000Z
UID:TALK116260@talks.cam.ac.uk
CONTACT:Professor Mike Cates
DESCRIPTION:Turbulence is an ubiquitous phenomenon in fluid flows. Yet\, c
 alculating its statistical properties\, and in particular what is generica
 lly called intermittency effects\, remains an open issue. We will focus on
  isotropic and homogeneous fully developed turbulence in incompressible fl
 ows. While much effort has been devoted to characterizing equal-time prope
 rties of the turbulent state\, less is known about its temporal behavior. 
 I will present some analytical results on the time dependence of generic n
 -point correlation functions in the stationary turbulent state. These resu
 lts are obtained from « first principles »\, i.e. starting from the Navi
 er-Stokes equation\, and using a field-theoretical approach (based on Func
 tional and Non-Perturbative Renormalisation Group techniques). They are as
 ymptotically exact in the limit of large wave-numbers. I will compare our 
 predictions with available results from both numerical simulations and exp
 eriments.\n\nM. Tarpin\, C. Pagani\, LC\, N. Wschebor\, to appear in J. Ph
 ys. A (2018)\nM. Tarpin\, LC\, N. Wschebor\, Phys. Fluids 30 (2018) \nLC\,
  V. Rossetto\, N. Wschebor\, G. Balarac\, PRE 95 (2017)\n
LOCATION:MR11\, CMS
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