Resolving small-scale structures in Boussinesq convection by adaptive grid methods

  • Authors:

  • Zhengru Zhang;Tao Tang

  • Affiliations:

  • School of Mathematical Sciences, Beijing Normal University, Beijing, PR China;Department of Mathematics, Hong Kong Baptist University, Kowloon Tong, Hong Kong

  • Venue:
  • Journal of Computational and Applied Mathematics - Special issue: The international symposium on computing and information (ISCI2004)
  • Year:
  • 2006

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Abstract

Inviscid Boussinesq convection is a challenging problem both analytically and numerically. Due to the complex dynamic development of small scales and the rapid loss of solution regularity, the Boussinesq convection pushes any numerical strategy to the limit. In E and Shu (Phys. Fluids 6 (1994) 49), a detailed numerical study of the Boussinesq convection in the absence of viscous effects is carried out using filtered pseudospectral method and a high-order accurate ENO schemes. In their computations, very fine grids have to be used in order to resolve the small-structures of the Boussinesq fluid. In this work, we will develop an efficient adaptive grid method for solving the inviscid incompressible flows, which can be useful in resolving extremely small-structures with reasonably small number of grid points. To demonstrate the effectiveness of the proposed method, the Boussinesq convection problem will be computed using the adaptive grid method.