http://www.cfd-online.com/W/index.php?title=Circular_advection&feed=atom&action=historyCircular advection - Revision history2013-06-20T09:17:39ZRevision history for this page on the wikiMediaWiki 1.16.5http://www.cfd-online.com/W/index.php?title=Circular_advection&diff=3011&oldid=prevPraveen at 09:16, 30 September 20052005-09-30T09:16:06Z<p></p>
<p><b>New page</b></p><div>The scalar advection equation<br />
<br />
:<math><br />
\frac{\partial u}{\partial t} + \frac{\partial}{\partial x}(yu) - \frac{\partial}{\partial y}(xu)= 0<br />
</math><br />
<br />
models advection along concentric circles. The characteristics are given by<br />
<br />
:<math><br />
\frac{dx}{dt} = y, \quad \frac{dy}{dt} = -x<br />
</math><br />
<br />
and they are concentric circles about the origin going in clockwise direction. Any given initial condition is advected in circles without change of shape or magnitude. This is a good test case for assessing the numerical viscosity in a scheme.<br />
<br />
==Advection of a hill==</div>Praveen