[FLASH-BUGS] Bug in quadratic_cartesian interpolation scheme?

From: Robi Banerjee (banerjee@physics.mcmaster.ca)
Date: Wed Nov 05 2003 - 11:05:16 CST

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    Hi,

      I ran into a problem (non convergence in the Riemann solver)
    using the new 'quadratic_cartesian' interpolation scheme in a
    3D simulation including selfgravity.
      Looking into the details after a refinement step I figured
    that the data in the newly refined blocks develop stripe-like
    structures. This leads, for instance, to overshooting in
    velocities, resp. mach numbers.
      Using the old interpolation scheme (second_order_old)
    everything is fine and the variables are smoothly prolongated
    onto the newly refined blocks.

      Is this a known problem, or is there a problem with the
    new (quadratic_cartesian) interpolation scheme?

      If you need more information, please don't hesitate to
    ask for (e.g. 2D slices of the simulation data with the
    two different interpolations schemes)

      Thank you,
    Robi

    ====================================
    Robi Banerjee
    Department of Physics and Astronomy
    ABB-320, McMaster University
    Hamilton, ON L8S 4M1
    CANADA
    e-mail: banerjee@physics.mcmaster.ca
    phone : (905) 525-9140 x 23189
    fax : (905) 546-1252
     

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