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<p style="margin-top:0;margin-bottom:0">Dear Zhai,</p>
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<p style="margin-top:0;margin-bottom:0">Assuming you have a periodic domain in direction "d" (d=1,2,3 or x,y,z), and</p>
<p style="margin-top:0;margin-bottom:0">that you have ffx=ffy=ffz=0 in your .usr file, then</p>
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<p style="margin-top:0;margin-bottom:0">grep volf logfile</p>
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<p style="margin-top:0;margin-bottom:0">will show a list of time step, time, and "ffd" + other columns.</p>
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<p style="margin-top:0;margin-bottom:0">Column 3 will be "ffd"</p>
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<p style="margin-top:0;margin-bottom:0">where ffd is the force in the direction "d" and d = |p54|.</p>
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<p style="margin-top:0;margin-bottom:0">p54 = +/- 1 ==> d=x direction</p>
<p style="margin-top:0;margin-bottom:0"> +/- 2 ==> y direction</p>
<p style="margin-top:0;margin-bottom:0"> +/- 3 ==> z direction</p>
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<p style="margin-top:0;margin-bottom:0">If p54 < 0, then p55 determines the mean velocity in direction d</p>
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<p style="margin-top:0;margin-bottom:0">If p54 > 0, then p55 determines the volumetric flux in direction d</p>
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<p style="margin-top:0;margin-bottom:0">(Note that p55 < 0 would be the flow is in the reverse direction.)</p>
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<p style="margin-top:0;margin-bottom:0">hth,</p>
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<p style="margin-top:0;margin-bottom:0">Paul</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Nek5000-users <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> Thursday, May 3, 2018 11:47:44 AM<br>
<b>To:</b> nek5000-users@lists.mcs.anl.gov<br>
<b>Subject:</b> [Nek5000-users] ffx ffy ffz from current run</font>
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<div dir="ltr">Hi Nek users,
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<div>How can I get the ffx ffy and ffz from the simulation with flowrate fixed, where ffx ffy and ffz are in usr file?</div>
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<div>Kind regards,</div>
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<div>Zhai</div>
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