BAIL 2006 Book of Abstracts - Institut für Numerische und ...
BAIL 2006 Book of Abstracts - Institut für Numerische und ...
BAIL 2006 Book of Abstracts - Institut für Numerische und ...
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W. LAYTON, I. STANCULESCU: Numerical Analysis <strong>of</strong> Approximate Deconvolution<br />
Models <strong>of</strong> Turbulence<br />
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Numerical Analysis <strong>of</strong> Approximate Deconvolution Models <strong>of</strong><br />
Turbulence<br />
William Layton ∗ and Iuliana Stanculescu †<br />
Abstract<br />
If the NSE are averaged with a local, spacial, convolution type filter the resulting<br />
system is not closed due to the term g ∗ (uu). A deconvolution operator GN is one<br />
which satisfies:<br />
u = GN(g ∗ u) + O(δ 2N+2 ) (0.1)<br />
where δ is the filter width. This yields the closure method:<br />
g ∗ (uu) = g ∗ (GN(g ∗ u)GN(g ∗ u)) + O(δ 2N+2 ) (0.2)<br />
We will review several solutions to the ill-possed deconvolution problem, present<br />
an ”optimal” deconvolution procedure and present numerical analysis and numerical<br />
experiments with it.<br />
∗<br />
Department <strong>of</strong> Mathematics, University <strong>of</strong> Pittsburgh, Pittsburgh, PA,15260, U.S.A.; email:<br />
wjl@pitt.edu, www.math.pitt.edu/˜wjl<br />
†<br />
Department <strong>of</strong> Mathematics, University <strong>of</strong> Pittsburgh, Pittsburgh, PA,15260, U.S.A.; email:<br />
ius1@pitt.edu, www.math.pitt.edu/˜ius1<br />
Speaker: STANCULESCU, I. 18 <strong>BAIL</strong> <strong>2006</strong><br />
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