The primitive equations are a version of the Navier-Stokes equations which describe hydrodynamical flow on the sphere under the assumptions that vertical motion is much smaller than horizontal motion (hydrostasis) and that the fluid layer depth is ...
limited fine-mesh model"(Abbreviated LFM.) An adaptation of Shuman and Hovermale's (1968) hemispheric six-layer primitive equations numerical weather prediction model.
primitive equations The Eulerian equations of fluid motion in which the primary dependent variables are the velocity components of the fluid. In meteorology, they can be specialized to apply directly to the cylonic-scale motions.
 See also: Atmosphere, Model, Pressure, Force, Layer
  
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