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Dear JC,
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<div>Yes --- just pull a copy of the common block out of torq_calc in navier5.f:</div>
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common /ctorq/ dragx(0:maxobj),dragpx(0:maxobj),dragvx(0:maxobj)</p>
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$ , dragy(0:maxobj),dragpy(0:maxobj),dragvy(0:maxobj)</p>
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$ , dragz(0:maxobj),dragpz(0:maxobj),dragvz(0:maxobj)</p>
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c</p>
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$ , torqx(0:maxobj),torqpx(0:maxobj),torqvx(0:maxobj)</p>
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$ , torqy(0:maxobj),torqpy(0:maxobj),torqvy(0:maxobj)</p>
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$ , torqz(0:maxobj),torqpz(0:maxobj),torqvz(0:maxobj)</p>
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c</p>
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$ , dpdx_mean,dpdy_mean,dpdz_mean</p>
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$ , dgtq(3,4)</p>
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c</p>
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<div>There you have access to all components, including breakdown into pressure and viscous</div>
<div>contributions. </div>
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<div>If you have only one object (or surface),</div>
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<div> dragx(0) = force in x direction (typ., = drag)</div>
<div> dragy(0) = force in y direction (typ., = lift)</div>
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<div>If you have multiple objects/surfaces, then dragx(k)=force in x direction on object k, k=1,...</div>
<div>and dragx(0) = sum_k=1,.. dragx(k)</div>
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<div>Paul</div>
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<div id="divRpF303273" 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> Thursday, March 30, 2017 3:33 AM<br>
<b>To:</b> Nek 5000<br>
<b>Subject:</b> [Nek5000-users] Accessing the value of drag and lift coefficients in usrchk<br>
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<div>Hi Nek,
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<div class="">I was wondering whether it was possible to access the values of the drag and lift coefficient directly into usrchk?</div>
<div class="">I know how to compute them but they only get printed in the logfile. I would need them for a control problem.</div>
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<div class="">Thanks a lot</div>
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