Elliptic-blending k - ε model
Elliptic-blending k - ε model
Elliptic-blending k - ε model
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Failure — need for improvement<br />
Buoyancy driven flow — Tall cavity<br />
Case from Betts and Bokhari (2001)<br />
◮ Symbols: Exp.<br />
◮ Yellow line: v 2 −f<br />
◮ Red line: EB k −<strong>ε</strong><br />
Comments:<br />
Too large decay of k close to<br />
the wall (laminar-state like)<br />
⇒ over-prediction of velocity<br />
and over-prediction of<br />
temperature gradient<br />
y/H<br />
Turbulent kinetic energy<br />
1<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
0<br />
0 0.01 0.02 0.03<br />
x/H
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