Acceleration: Difference between revisions
From Glossary of Meteorology
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== acceleration == | == acceleration == | ||
<div class="definition"><div class="short_definition">The rate of change with time of the [[velocity]] vector of a [[particle]].</div><br/> <div class="paragraph">If '''u''' is the [[vector]] velocity, the acceleration may be written as ''D'''''u'''/''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: <div class="display-formula"><blockquote>[[File:ams2001glos-Ae5.gif|link=|center|ams2001glos-Ae5]]</blockquote></div> where ∂'''u'''/∂''t'' is called the [[local acceleration]], and '''u''' · '''∇ | |||
<div class="definition"><div class="short_definition">The rate of change with time of the [[velocity]] vector of a [[particle]].</div><br/> <div class="paragraph">If '''u''' is the [[vector]] velocity, the acceleration may be written as ''D'''''u'''/''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: <div class="display-formula"><blockquote>[[File:ams2001glos-Ae5.gif|link=|center|ams2001glos-Ae5]]</blockquote></div> where ∂'''u'''/∂''t'' is called the [[local acceleration]], and '''u''' · '''∇u''' is called the [[convective acceleration]].</div><br/> </div> | |||
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Revision as of 12:49, 6 August 2014
acceleration
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: where ∂u/∂t is called the local acceleration, and u · ∇u is called the convective acceleration.