<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>The meaning of the two parameters depends on the filterType. Typically a filterCutOffRatio of 0.9 works well (for say N=7). There is a weak dependence to the filterWeight but that’s something you need to explore for your case. May be Philipp can tell you more about it including some references.</div><div><br></div><div>Stefan</div><div><br>On 1 Sep 2018, at 06:16, "<a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a>" <<a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div style="color:rgb(0,0,0);font-family:Arial;font-size:14px;text-align:justify"><div><font color="#24292e" face="SFMono-Regular, Consolas, Liberation Mono, Menlo, Courier, monospace" style="line-height:23.8px"><span style="white-space:pre;font-size:18px">Hi neks,</span></font></div><div><font color="#24292e" face="SFMono-Regular, Consolas, Liberation Mono, Menlo, Courier, monospace" style="line-height:23.8px"><span style="white-space:pre;font-size:18px"> Recently I am working on an LES simulation in an annular pipe to see how transverse velocity goes with Re increasing. </span></font></div><div><font color="#24292e" face="SFMono-Regular, Consolas, Liberation Mono, Menlo, Courier, monospace" style="line-height:23.8px"><span style="white-space:pre;font-size:18px">But I am quite wondering how I should set filterWeight and filterCutoffRatio in my example while in the turbChannel demo they are selected to 10 an 0.9 respectively as proposed value.</span></font></div><div><font color="#24292e" face="SFMono-Regular, Consolas, Liberation Mono, Menlo, Courier, monospace" style="line-height:23.8px"><span style="white-space:pre;font-size:18px">They should be sensitive parameters in LES simulation, don't they? Is there any references concerned about them to help me see them more clearly? </span></font></div><div><font color="#24292e" face="SFMono-Regular, Consolas, Liberation Mono, Menlo, Courier, monospace" style="line-height:23.8px"><span style="white-space:pre;font-size:18px">If it is convenient for you could you please reply me a url to the reference? Thank you so much for your assistence.</span></font></div><div><font color="#24292e" face="SFMono-Regular, Consolas, Liberation Mono, Menlo, Courier, monospace" style="line-height:23.8px"><span style="white-space:pre;font-size:18px"><br></span></font></div></div></div></div></blockquote><div><br></div><br><blockquote type="cite"><div><div dir="ltr"><div style="color:rgb(0,0,0);font-family:Arial;font-size:14px;text-align:justify"><div><font color="#24292e" face="SFMono-Regular, Consolas, Liberation Mono, Menlo, Courier, monospace" style="line-height:23.8px"><span style="white-space:pre;font-size:18px">best regard</span></font></div></div><div style="color:rgb(0,0,0);font-family:Arial;font-size:14px;text-align:justify;zoom:1">--</div></div>
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