******************* This email originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* Hi all, Quick question: The user guide (v5.0) states: " To split a prism boundary layer on surface 11 into 3 layers with a growth rate of 2 and 7 integration points per element use the following: NekMesh -m bl:surf=11:layers=3:r=2:nq=7 MeshOnePrismLayer.xml Mesh3PrismsLayers.xml " What would be the correct nq when using, say, <E COMPOSITE="C[1]" NUMMODES="5" FIELDS="u,v,w" TYPE="MODIFIED" /> <E COMPOSITE="C[1]" NUMMODES="4" FIELDS="p" TYPE="MODIFIEDQUADPLUS1" />? I am confused because (a) different poly order in *u* and p and (b) I am using dealiasing and not sure if the "integration points" above would include the extra integration points or not. Thank you for your time. --- *Vishal SAINI*
Hi Vishal, Sorry I have been very behind on emails this past month. Hopefully you have gotten to the bottom of this now. In the expansion you provided the pressure field polynomial order is one order low but the quadrature order is raised by one. This is wha the PLUS1 denotes. So the velocity and pressure field will have the same quadrature order which allows us to do similar operations in physical space. The dealiasing would then increase the quadrature order when calculating the non-linear terms correct. The pressure field is also not used in the non-linear terms. Cheers, Spencer. Spencer Sherwin FREng, FRAeS Head of Aerodynamics Section, Director of Research Computing Service, Professor of Computational Fluid Mechanics, Department of Aeronautics, South Kensington Campus, Imperial College London, SW7 2AZ, UK Phone: +44 (0)20 7594 5052 http://www.imperial.ac.uk/people/s.sherwin/ On 10 Nov 2020, at 17:14, Vishal Saini <vishal.saini.nitj@gmail.com<mailto:vishal.saini.nitj@gmail.com>> wrote: This email from vishal.saini.nitj@gmail.com<mailto:vishal.saini.nitj@gmail.com> originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list<https://spam.ic.ac.uk/SpamConsole/Senders.aspx> to disable email stamping for this address. Hi all, Quick question: The user guide (v5.0) states: " To split a prism boundary layer on surface 11 into 3 layers with a growth rate of 2 and 7 integration points per element use the following: NekMesh -m bl:surf=11:layers=3:r=2:nq=7 MeshOnePrismLayer.xml Mesh3PrismsLayers.xml " What would be the correct nq when using, say, <E COMPOSITE="C[1]" NUMMODES="5" FIELDS="u,v,w" TYPE="MODIFIED" /> <E COMPOSITE="C[1]" NUMMODES="4" FIELDS="p" TYPE="MODIFIEDQUADPLUS1" />? I am confused because (a) different poly order in u and p and (b) I am using dealiasing and not sure if the "integration points" above would include the extra integration points or not. Thank you for your time. --- Vishal SAINI _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users
participants (2)
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Sherwin, Spencer J
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Vishal Saini