<html dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="">
<!--
p
{margin-top:0;
margin-bottom:0}
-->
</style><style type="text/css" id="owaParaStyle"></style>
</head>
<body dir="ltr" fpstyle="1" ocsi="0">
<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">
<div><br>
</div>
Dear Juan,
<div><br>
What kind of polynomial space are you projecting onto?</div>
<div><br>
</div>
<div>Is it the standard Nek basis (which is piecewise polynomial), or something different?</div>
<div><br>
</div>
<div>We have routines to do dealiasing, but it might be better to understand the problem</div>
<div>a bit more.</div>
<div><br>
</div>
<div>Paul</div>
<div><br>
</div>
<div>
<div style="font-family: Times New Roman; color: #000000; font-size: 16px">
<hr tabindex="-1">
<div id="divRpF925819" style="direction: ltr;"><font face="Tahoma" size="2" color="#000000"><b>From:</b> nek5000-users-bounces@lists.mcs.anl.gov [nek5000-users-bounces@lists.mcs.anl.gov] on behalf of nek5000-users@lists.mcs.anl.gov [nek5000-users@lists.mcs.anl.gov]<br>
<b>Sent:</b> Tuesday, March 21, 2017 9:08 PM<br>
<b>To:</b> nek5000-users@lists.mcs.anl.gov<br>
<b>Subject:</b> [Nek5000-users] Project a solution onto a polynomial space<br>
</font><br>
</div>
<div></div>
<div>
<div id="divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:#000000; font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Hello,</p>
<p><br>
</p>
<p>I need to compute some non-linear quantities as part of a post-processing procedure. Because they are non-linear, I will need to do some kind of dealiasing. So far, I know how to map the velocity field onto a finer grid (higher polynomial order) to compute
the non-linear quantities. However, I don't know how to project the resulting field onto the original polynomial space.</p>
<p><br>
</p>
<p>Note, I want to find the "projection" onto the original space, but not the "interpolation". </p>
<p><br>
</p>
<p>Thanks,</p>
<p><br>
</p>
<p>Juan Diego</p>
</div>
</div>
</div>
</div>
</div>
</body>
</html>