Hi Wilson, Perhaps this post contains information that may be helpful? http://public.kitware.com/pipermail/paraview/2009-January/010608.html
Is the boundary layer in your simulation properly resolved? That steep gradient near the wall could be smeared out if the proper resolution isn't used. -Chris On Thu, Aug 24, 2017 at 12:49 AM, HongchaoWang <hongchao.wang2...@gmail.com> wrote: > Hi, > > > > How does Paraview calculate the velocity gradient if I use filter “gradient > of unstructured data set”? And what is the difference between using cell data > and point data as input? > > > > > > For my case I am simulating an oscillatory flow inside a narrow channel, I > would like to obtain the velocity gradient in order to calculate the shear > stress across the channel. I applied the filter “gradient of unstructured > data set” and use cell data as input. The results are reasonable for most > region in the channel except for the velocity gradient in the first near-wall > cell. The value is about half the analytical solution. Why is that? > > > > > > Many thanks, > > Wilson > > > > > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at http://www.kitware.com/ > opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > Search the list archives at: http://markmail.org/search/?q=ParaView > > Follow this link to subscribe/unsubscribe: > http://public.kitware.com/mailman/listinfo/paraview > > -- Christopher Neal Research Engineer Streamline Numerics, Inc. https://www.snumerics.com/
_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Search the list archives at: http://markmail.org/search/?q=ParaView Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/paraview
