Registered Data

[CT145]

  • Session Time & Room
    • CT145 (1/1) : 5D @D101 [Chair: Robert Gwyn Owens]
  • Classification
    • CT145 (1/1) : Basic methods in fluid mechanics (76M) / Rarefied gas flows, Boltzmann equation in fluid mechanics (76P)

[00705] A boundary integral method for slow free surface flows

  • Session Time & Room : 5D (Aug.25, 15:30-17:10) @D101
  • Type : Contributed Talk
  • Abstract : In this talk we will present a boundary integral method suitable for the solution of creeping flow boundary value problems where the boundary presents singularities in the stresses. We use the method to solve the problem of the planar extrusion of a Newtonian fluid at zero Reynolds number and, in particular, to determine the shape of the free surface in the immediate neighbourhood of the separation point for a range of capillary numbers.
  • Classification : 76M15, 76D05, 76D07, Free-surface fluid flows, singularities
  • Format : Talk at Waseda University
  • Author(s) :
    • Loïc Gobet (University of Montreal)
    • Robert Gwyn Owens (University of Montreal)

[02583] Novel shock-capturing procedure for discontinuous Galerkin method for compressible flows

  • Session Time & Room : 5D (Aug.25, 15:30-17:10) @D101
  • Type : Contributed Talk
  • Abstract : In this work we develop a novel shock capturing procedure based on adaptive reformation of finite volume sub-cells for higher order discontinuous Galerkin method. For this we developed a sub-cell shock indicator based on Harten’s strategy to provide enhanced shock detection using just the degrees of freedom in respective mesh element. We apply this new procedure in the current state-of-the-art entropy stable discontinuous Galerkin method and demonstrate some numerical results for 1D compressible Euler equations.
  • Classification : 76M10, 76M12, 76-10, 35L65
  • Format : Online Talk on Zoom
  • Author(s) :
    • Kedar Shridhar Wagh (Indian Institute of Science)
    • S. V. Raghurama Rao (Indian Institute of Science)
    • Sashikumaar Ganesan (Indian Institute of Science)

[02372] Stokes flow past circular cylinders in slip-patterned microchannel using BEM

  • Session Time & Room : 5D (Aug.25, 15:30-17:10) @D101
  • Type : Contributed Talk
  • Abstract : We present Stokes flow past staggered circular cylinders in microchannel with an alternating slip and no-slip on the channel walls. We utilize Boundary Element Method (BEM) to numerically solve Stokes equation. In order to gain a deep insight of flow mechanics, we investigate the streamlines, velocity profiles, and pressure drops with varying slip-length, radius of the cylinder, and spacing between the cylinder. The findings of this study might be helpful for mixing enhancement in microchannel.
  • Classification : 76M15, 35Q30, 76B15, 65N38, 76M10
  • Author(s) :
    • Chandra Shekhar Nishad (Pandit Deendayal Energy University Gandhinagar )

[00878] Large-amplitude problem of BGK model

  • Session Time & Room : 5D (Aug.25, 15:30-17:10) @D101
  • Type : Contributed Talk
  • Abstract : BGK equation is a relaxation model of the Boltzmann equation for simulation of various kinetic flow problems. In this work, we study asymptotic stability of the BGK model when the initial data is not necessarily close to global equilibrium pointwisely. Main difficulty of the BGK equation comes from the highly nonlinear structure of the relaxation operator. To overcomes this issue, we derive refined control of macroscopic fields to guarantee the system enters quadratic nonlinear regime.
  • Classification : 76P05, 35B35, 35B40, 82C40
  • Format : Talk at Waseda University
  • Author(s) :
    • Gichan Bae (Seoul National University)
    • Gyounghun Ko (POSTECH)
    • donghyun lee (POSTECH)
    • Seokbae Yun (Sungkyunkwan University)

[00096] Multi-scale analysis of concentration distribution inside porous medium channel configuration

  • Session Time & Room : 5D (Aug.25, 15:30-17:10) @D101
  • Type : Contributed Talk
  • Abstract : A multiple-scale perturbation analysis is presented for the two-dimensional concentration distribution of passive contaminant released in an incompressible viscous fluid channel filled with a porous medium. The flow is driven by the combined effect of the upper plate oscillation and the periodic pressure gradient. Homogenization technique is used to find the concentration distribution up to third order. For a fixed amplitude of oscillation and pulsation, frequency of pressure pulsation has stronger effect on the dispersion.
  • Classification : 76M50, 76R99, 76S99
  • Format : Online Talk on Zoom
  • Author(s) :
    • Timir Karmakar (Department of Mathematics, National Institute of Technology Meghalaya, Shillong, Meghalaya 793003)
    • Swarup Barik (2Department of Mathematics, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203)
    • Raja Sekhar G P (Indian Institute of Technology Kharagpur India)