<html><body><div style="font-family: times new roman, new york, times, serif; font-size: 18pt; color: #000000"><div>Thanks, but did you forget to include the name of the forum?<br></div><div>Stephen<br></div><div><br></div><hr id="zwchr"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"Ezhilmathi Krishnasamy" <ezhkr601@student.liu.se><br><b>To: </b>"Ahmet Ahmet" <ahmetskyland@gmail.com><br><b>Cc: </b>"ParaView" <paraview@paraview.org><br><b>Sent: </b>Wednesday, December 6, 2017 3:05:56 PM<br><b>Subject: </b>Re: [Paraview] wallShearStress Calculation in Paraview<br><div><br></div><div dir="ltr"><div><div><div><div><div>Hi Ahmet, <br><div><br></div></div>What you can do that is, use the filter name called extract surface. <br></div>once you get that surface either you can export those values in form of from elements or from the points.<br><div><br></div></div>It might work, or you may get more clear explanation from this forum.<br><div><br></div></div>Cheers, <br></div>Mathi <br><div><div><div><br><div><br></div></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 6 December 2017 at 15:00, Ahmet Ahmet <span dir="ltr"><<a href="mailto:ahmetskyland@gmail.com" target="_blank">ahmetskyland@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr"><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;display:inline;float:none">Hello everyone,</span><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><div>I
have results with OpenFOAM including p,T,U outputs. Due to some
reasons, I can't use wallShearStress or wallgradU utility in OF. So, I
have to calculate it on Paraview. I saw many topics related to that on
google, but I could not find a satisfactory answer. My case is 3-D,
compressible and laminar but we can think about incompressible and may
be 2-D. </div><div><br></div><div>I think the most important part for
WSS is to calculate velocity gradient. My unsolved problem is to
calculate that. How can I calculate gradients on the wall? I have
no-slip wall, that is u=0 and with<span> </span><b>Gradient of Unstructured DataSet/Compute Derivatives </b>filters,
I obtained 0 on the wall. I think the values in the nearest mesh to the
wall should be accounted for. To do that, what should I do?</div><div><br></div><div><b>Note:</b> <br></div><div><ol><li>T<span style="color:rgb(0,0,0);white-space:pre-wrap">he walls are not aligned with a coordinate axis. For this part, I tried to </span><span style="color:rgb(0,0,0);white-space:pre-wrap">extract the wall surface and generate normal vectors. <br></span></li><li><span style="color:rgb(0,0,0);white-space:pre-wrap">As an alternative to get directly on wall, I tried to get slice a little bit over the wall surface and then take surface vector on slice then gradient of unstructured dataset on surface vector. That gives me a result but I am not sure it's true. </span></li></ol></div><div><br></div><div>This may be simple for you, sorry for that.</div><div>Thank you in advance,</div></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><div><div class="m_-2537045137127734915gmail-m_4416169094697429070gmail_signature">Ahmet</div></div></div></div></div>
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<br>_______________________________________________<br>Powered by www.kitware.com<br><div><br></div>Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html<br><div><br></div>Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView<br><div><br></div>Search the list archives at: http://markmail.org/search/?q=ParaView<br><div><br></div>Follow this link to subscribe/unsubscribe:<br>http://public.kitware.com/mailman/listinfo/paraview<br></blockquote><div><br></div></div></body></html>