December 2018 - Nektar-users

issue in my calculation
by 中华腾飞 11 Dec '18

11 Dec '18

Thank you for reading my letter with your busy schedule. I'm an undergraduate so i'm not so skilled in CFD. Now i have a task that need me to use nektar++,but when i use the compressible solver to calculate it , the error 'vacuum is generated by given data' always comes up. I try to change my boundry conditions,but it doesn't work. Can you give me some suggestions? Looking forward to your reply!

2 1

Re: [Nektar-users] Handling Pyramids
by Vishal Saini 07 Dec '18

07 Dec '18

Dear Spencer and David, Thanks very much for your prompt replies. 1. Defining the expansions separately still produced the "note" (in Nektar 4.4.1 Release). 2. Compiling the latest master solved the problem. However, I didn't try if defining the expansions collectively i.e. *<E COMPOSITE="C[1,10,11]" NUMMODES="3" FIELDS="u,v,w,p" TYPE="MODIFIED" /> *produces any warnings in the latest compilation. BR, Vishal --- *Vishal SAINI* On Mon, Nov 26, 2018 at 4:43 PM Moxey, David <D.Moxey(a)exeter.ac.uk> wrote: > Hi Vishal, > > You might also try a newer version of the code (i.e. latest master), I am > not sure that the pyramid collections functions were added in 4.4.1. > > Many thanks, > > Dave > > > On 26 Nov 2018, at 14:53, Sherwin, Spencer J <s.sherwin(a)imperial.ac.uk> > wrote: > > > > Dear Vishal, > > > > I do not quite recall but it may be necessary to define the expansions > for composites of different shape independently. So please try: > > > >> <E COMPOSITE=“C[1]" NUMMODES="3" FIELDS="u,v,w,p" TYPE="MODIFIED" /> > >> <E COMPOSITE=“C[10]" NUMMODES="3" FIELDS="u,v,w,p" TYPE="MODIFIED" /> > >> <E COMPOSITE="C[11]" NUMMODES="3" FIELDS="u,v,w,p" TYPE="MODIFIED" /> > > > > Possibly it is expecting to have a pyramid collection within a > tetrahedral expansion and so this is why you see this message. > > > > If this does not work can you send the xml file along. > > > > Thanks, > > Spencer. > > > > > >> On 26 Nov 2018, at 11:45, Vishal Saini <vishal.saini.nitj(a)gmail.com> > wrote: > >> > >> Hi all, > >> > >> I've imported a mesh from gmsh that contains a layer of pyramids for > transitioning between hexes and tets using: > >> NekMesh JICF_NektP2_2comp.msh JICF_NektP2_2comp.xml > >> Output: > >> Multiple elements in composite detected; remapped: > >> - Tag 1 => 11 (Tetrahedron), 10 (Pyramid), 1 (Hexahedron) > >> No problem on NekMesh level. > >> > >> Defining my expansion as: > >> <E COMPOSITE="C[1,10,11]" NUMMODES="3" FIELDS="u,v,w,p" TYPE="MODIFIED" > /> > >> > >> when I run (Nektar++ v 4.4.1) using: > >> mpirun -npernode 28 -np 56 IncNavierStokesSolver -v > JICF_NektP2_2comp_xml conditions_JICF_2D.xml > >> (using prepartitioned mesh). > >> I get the following "note": > >> Collection Implemenation for Tetrahedron ( 3 3 3 ) for ngeoms = 24960 > >> Note: Implementation does not exist: Pyramid, BwdTrans, SumFac, Modal > >> Note: Implementation does not exist: Pyramid, IProductWRTBase, SumFac, > Modal > >> Note: Implementation does not exist: Pyramid, IProductWRTDerivBase, > SumFac, Modal > >> Note: Implementation does not exist: Pyramid, PhysDeriv, SumFac, Modal > >> Note: Implementation does not exist: Pyramid, BwdTrans, SumFac, Modal > >> Note: Implementation does not exist: Pyramid, IProductWRTBase, SumFac, > Modal > >> Note: Implementation does not exist: Pyramid, IProductWRTDerivBase, > SumFac, Modal > >> Note: Implementation does not exist: Pyramid, PhysDeriv, SumFac, Modal > >> > >> What does it mean? How can I fix it? > >> Do Pyramids need to be treated in a somewhat different way? > >> > >> BR, > >> Vishal > >> > >> > >> --- > >> Vishal SAINI > >> _______________________________________________ > >> Nektar-users mailing list > >> Nektar-users(a)imperial.ac.uk > >> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users > > > > Spencer Sherwin FREng, FRAeS > > Head, Aerodynamics, > > Director of Research Computing Service, > > Professor of Computational Fluid Mechanics, > > Department of Aeronautics, > > s.sherwin(a)imperial.ac.uk South > Kensington Campus, > > Phone: +44 (0)20 7594 5052 Imperial College > London, > > Fax: +44 (0)20 7594 1974 London, SW7 > 2AZ, UK > > http://www.imperial.ac.uk/people/s.sherwin/ > > > > _______________________________________________ > > Nektar-users mailing list > > Nektar-users(a)imperial.ac.uk > > https://mailman.ic.ac.uk/mailman/listinfo/nektar-users > >

2 2

Compilation problems - macOS Mojave
by Denny, Ryan 06 Dec '18

06 Dec '18

Hi all, Has anyone had issues with compilation since upgrading to Mojave? I’ve updated all required packages but get the attached error message, which appears when the compiler tries to link the LibUtilities library. Thanks, Ryan

1 0