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JFM Webinar Series

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JFM/DAMTP/LIFD/UKFN webinar

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SPEAKER: Laurette Tuckerman TALK TITLE: Turbulent-laminar patterns ABSTRACT: Experiments and numerical simulations have shown that turbulence in transitional wall-bounded shear flows such as plane Couette and Poiseuille flow frequently takes the form of long oblique bands, if the domains are sufficiently large to accommodate them. At their upper Reynolds-number threshold, laminar regions carve out gaps...

JFM/DAMTP/LIFD/UKFN webinar

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Solution discovery in fluid dynamics using neural networks Prof Ching-Yao Lai Stanford University Friday, December 1, 2023 4:00 PM (Europe/London)

Journal of Fluid Mechanics Webinar Series: Guohua Wang, China and Keith Moffatt, UK

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Speaker: Guohua Wang, Lanzhou University, China Date/Time: Friday 18th June 2021 4:00pm BST/11am EDT Title: Very-large scale motions in the atmospheric surface layer Abstract: Very-large scale motions (VLSMs) are typical structures in wall-bounded turbulence at high Reynolds number, which make important contributions to mass and energy transport. This talk will present the atmospheric surface layer observations carried out at...

Journal of Fluid Mechanics Webinar Series: Jane Bae, USA and Axel Huerre, France

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Speaker: Jane Bae, Harvard University, USA Date/Time: Friday 11th June 2021 4:00pm BST/11am EDT Title: Nonlinear interaction of the self-sustaining process in the near-wall region of wall-bounded turbulence Abstract: We investigate the nonlinear interaction in the self-sustaining process of wall-bounded turbulence. Resolvent analysis is used to identify the principal forcing (nonlinear) mode which produces the maximum amplification in direct...

Journal of Fluid Mechanics Webinar Series: Laura Cope, UK and Hugues Faller, France

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  Speaker: Laura Cope, Cambridge University, UK Date/Time: Friday 4th June 2021 4:00pm BST/11am EDT Title: The dynamics of stratified horizontal shear flows at low Péclet number Abstract: Stratified flows are ubiquitous; examples include atmospheres and oceans in geophysics and stellar interiors in astrophysics. The interaction of a stable stratification with a background velocity distribution can develop into stratified...

Journal of Fluid Mechanics Webinar Series: Chris Howland, Netherlands and Shingo Motoki, Japan

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Speaker: Chris Howland, University of Twente, Netherlands Date/Time: Friday 28th May 2021 4:00pm BST/11am EST Title: Quantifying mixing in simulations of stratified flows Abstract: Turbulent mixing exerts a significant influence on many physical processes in the ocean. In a stably stratified Boussinesq fluid, this irreversible mixing describes the conversion of available potential energy (APE) to background potential energy (BPE)....

Journal of Fluid Mechanics Webinar Series: Adrian Lozano-Duran, USA and Adrian Lozano-Duran, USA

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Speaker: Adrian Lozano-Duran, MIT, USA Date/Time: Friday 21st May 2021 4:00pm BST/11am EST Title: Cause-and-effect of linear mechanisms sustaining in wall turbulence Abstract: Despite the nonlinear nature of turbulence, there is evidence that part of the energy-transfer mechanisms sustaining wall turbulence can be ascribed to linear processes. The different scenarios stem from linear stability theory and comprise exponential instabilities,...

Journal of Fluid Mechanics Webinar Series: George Fortune, UK and Xianyang Jiang, UK

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Speaker: George Fortune, University of Cambridge, UK Date/Time: Friday 14th May 2021 4:00pm BST/11am EST Title: Waltzing worms: the dynamics of plant-animal collective vortex structures Abstract: Circular milling, a stunning manifestation of collective motion, is found across the natural world, from fish shoals to army ants. It has been observed recently that the plant-animal worm Symsagittifera roscoffensis exhibits circular milling behaviour,...

Journal of Fluid Mechanics Webinar Series : Zijing Ding, China and Mazi Jalaal, Netherlands

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Speaker: Zijing Ding, Harbin Institute of Technology, China Date/Time: Friday 7th May 2021 4:00pm BST/11am EST Title: Coating Liquid Films down a Vertical Fibre Abstract: Previous experimental study by Kliakhandler et al. (JFM 429:381-390, 2001) reported three different flow patterns of a liquid film flowing down a vertical cylinder. The film flow is unstable due to the famous Plateau-Rayleigh...

Journal of Fluid Mechanics Webinar Series: Jesse Capecelatro, USA and Saksham Sharma, UK

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Speaker: Jesse Capecelatro, University of Michigan, USA Date/Time: Friday 30th April 2021 4:00pm BST/11am EST Title: Turbulence modeling of strongly-coupled gas-particle flows Abstract: Many natural and industrial processes involve the flow of solid particles or liquid droplets whose dynamical evolution are intimately coupled with a carrier gas. A peculiar behavior of such flows is their ability to give...