Elliptic relaxation for near wall turbulence models
Elliptic relaxation for near wall turbulence models
Elliptic relaxation for near wall turbulence models
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<strong>Elliptic</strong> <strong>relaxation</strong> approach<br />
The model accurately represents the asymptotic<br />
behaviour of the stresses even in the <strong>near</strong> <strong>wall</strong> layer.<br />
There is no need to prescribe the distance from the<br />
<strong>wall</strong>, so no ill defined in complex geometries.<br />
No use of empiricall damping functions.<br />
Good representation of the stresses in channel flows<br />
and boundary layers.<br />
Requires 13 transport equations ( 6 <strong>for</strong> uiuj, 6 <strong>for</strong> fij<br />
and one <strong>for</strong> ε).<br />
Numerical difficulties with <strong>wall</strong> boundary conditions <strong>for</strong><br />
f22, f12, f23.<br />
Equations required to be solved coupled.<br />
<strong>Elliptic</strong> <strong>relaxation</strong> <strong>for</strong> <strong>near</strong> <strong>wall</strong> <strong>turbulence</strong> <strong>models</strong> – p. 8/22
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