Name

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  MGH_FLOW

Purpose

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  This is an IDL implementation of the Matlab "flow" function. It is
  useful as a test dataset for 3D interpolation and visualisation
  code.
  The result of the function is alleged to represent "the speed
  profile of a submerged jet within a infinite tank (Fluid
  Mechanics, Landau & Lifshitz)", but it is not clear to me what
  physical situation it represents. The return value of the function
  is in fact the logarithm of a velocity. The field is radially
  symmetric about the x axis there is a cone of low values
  (near-zero speed hence large negative logarithm) with half-angle
  about the x axis of 15^deg or so. This tends not to be
  well-sampled on a rectangular grid.
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  This software is provided subject to the following conditions:
  1. NIWA makes no representations or warranties regarding the
    accuracy of the software, the use to which the software may
    be put or the results to be obtained from the use of the
    software. Accordingly NIWA accepts no liability for any loss
    or damage (whether direct of indirect) incurred by any person
    through the use of or reliance on the software.
  2. NIWA is to be acknowledged as the original author of the
    software where the software is used or presented in any form.
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Modification History

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  Mark Hadfield, Dec 2000:
    Written, based on the Matlab flow function..