Acceleration

From Glossary of Meteorology
Revision as of 13:49, 6 August 2014 by imported>Liss45 (→‎acceleration)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)



acceleration

The rate of change with time of the velocity vector of a particle.

If u is the vector velocity, the acceleration may be written as Du/Dt, where D/Dt is the material (or total) derivative. For most purposes in hydrodynamics where Eulerian coordinates are employed, the acceleration is decomposed as follows:
ams2001glos-Ae5
where ∂u/∂t is called the local acceleration, and u · ∇u is called the convective acceleration.