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Front propagation and feedback in convective Flow-Fields

Speaker: Dr. Saikat Mukherjee

Date & time: 7th Nov 2020 @ 11:00 am (New Delhi)
6th Nov: 9:30 pm (Los Angeles); 7th Nov 2020 @ 6:30 am (Berlin), 7th Nov 1:30 pm (Beijing), 7th Nov 2:30 pm (Tokyo)

Abstract of the lecture Quantification of transport of reacting species in the presence of a flow field is important in many problems of engineering and science. A front is described as a moving interface between two different states of a system such as between the products and reactants in a chemical reaction. In this discussion I focus on my doctoral dissertation work where I studied the propagation of autocatalytic reaction fronts, fronts with feedback and pattern forming fronts in chaotic Rayleigh-Benard convection [1, 2, 3, 4]. I discuss how the spatial variations in chaotic and convective flow fields of varying complexity affects the propagation of fronts by reorienting the geometry of the front interface. In certain scenarios the propagating front feeds back to the flow field by inducing a local self-organized flow field that interacts with the background convection. I talk about the rich and emergent dynamics resulting from this front induced feed- back which enhances the burning and propagation of fronts. Finally, we study the properties of pattern forming fronts which leave a trail of spatial structures behind as they propagate. Pattern forming fronts of convection rolls are studied and the velocity of the front and spatial distribution of the patterns left behind by the front is quantified.

Related publications

  1. S. Mukherjee and M. R. Paul. Velocity and geometry of propagating fronts in complex convective flow fields. Phys. Rev. E, 99:012213, 2019.
  2. S. Mukherjee and M. R. Paul. Propagating fronts in fluids with solutal feedback. Phys. Rev. E, 101:032214, 2020.
  3. Saikat Mukherjee. Front Propagation and Feedback in Convective Flow Fields. PhD thesis, Virginia Tech, 2020.
  4. S. Mukherjee and M. R. Paul. The cooperative and antagonistic feedback of propagating fronts through a fluid. In Preparation, 2020.

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