Re: [Nektar-users] FW: Error in apply Dong outflow BCs
Hi Spencer, This is a very simple 2 dimesnional mesh with no curved elements. So I do not think this is a meshing issue. In fact changing the outflow Robin BCs to a more conventional Nuemann form for velocity immediately allows the solution to run smoothly. Sincerely, On Wed, Feb 27, 2019 at 3:26 AM Amitvikram Dutta < amitvikram.dutta@uwaterloo.ca> wrote:
------------------------------ *From:* nektar-users-bounces@imperial.ac.ukOn Behalf OfSherwin, Spencer J *Sent:* February 27, 2019 3:25:43 AM (UTC-05:00) Eastern Time (US & Canada) *To:* Amitvikram Dutta *Cc:* nektar-users *Subject:* Re: [Nektar-users] Error in apply Dong outflow BCs
Hi Amitvikram,
What sort of mesh were you running? Perhaps this is a 3D element we have not fully tested ?
Cheers, Spencer
Sent from my iPhone
On 27 Feb 2019, at 07:09, Amitvikram Dutta <amitvdutta23@gmail.com> wrote:
Hi all,
I'm testing out the Robin type BCs for the outflow as given in the user guide. Which takes the form of the following
<R VAR="u" USERDEFINEDTYPE="HOutflow" VALUE="0" PRIMCOEFF="D0/TimeStep"/> <R VAR="v" USERDEFINEDTYPE="HOutflow" VALUE="0" PRIMCOEFF="D0/TimeStep"/> <R VAR="p" USERDEFINEDTYPE="HOutflow" VALUE="0" PRIMCOEFF="1.0/(D0*Kinvis)"/>
Upon startup, this gives the error
Fatal : Level 0 assertion violation Could not identify matrix type from dimension
I havent come across this error before. Could someone point out what the error is? SIncerely, --
*Amitvikram Dutta*
Graduate Research Assistant
Fluid Mechanics Research Lab
Multi-Physics Interaction Lab
University of Waterloo
_______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk https://mailman.ic.ac.uk/mailman/listinfo/nektar-users
--
*Amitvikram Dutta* Graduate Research Assistant Fluid Mechanics Research Lab Multi-Physics Interaction Lab University of Waterloo
Hi Amitvikram, OK that is unusual. Could you check the test case in solvers/IncNavierStokesSolver/TestsChanFlow_m3_ConOBC.xml Runs OK. Since this is the test case for the convective Outflow BCs. There are also a few others in that directory. Cheers, Spencer. On 27 Feb 2019, at 13:33, Amitvikram Dutta <amitvdutta23@gmail.com<mailto:amitvdutta23@gmail.com>> wrote: Hi Spencer, This is a very simple 2 dimesnional mesh with no curved elements. So I do not think this is a meshing issue. In fact changing the outflow Robin BCs to a more conventional Nuemann form for velocity immediately allows the solution to run smoothly. Sincerely, On Wed, Feb 27, 2019 at 3:26 AM Amitvikram Dutta <amitvikram.dutta@uwaterloo.ca<mailto:amitvikram.dutta@uwaterloo.ca>> wrote: ________________________________ From: nektar-users-bounces@imperial.ac.ukOn<mailto:nektar-users-bounces@imperial.ac.ukOn> Behalf OfSherwin, Spencer J Sent: February 27, 2019 3:25:43 AM (UTC-05:00) Eastern Time (US & Canada) To: Amitvikram Dutta Cc: nektar-users Subject: Re: [Nektar-users] Error in apply Dong outflow BCs Hi Amitvikram, What sort of mesh were you running? Perhaps this is a 3D element we have not fully tested ? Cheers, Spencer Sent from my iPhone On 27 Feb 2019, at 07:09, Amitvikram Dutta <amitvdutta23@gmail.com<mailto:amitvdutta23@gmail.com>> wrote: Hi all, I'm testing out the Robin type BCs for the outflow as given in the user guide. Which takes the form of the following <R VAR="u" USERDEFINEDTYPE="HOutflow" VALUE="0" PRIMCOEFF="D0/TimeStep"/> <R VAR="v" USERDEFINEDTYPE="HOutflow" VALUE="0" PRIMCOEFF="D0/TimeStep"/> <R VAR="p" USERDEFINEDTYPE="HOutflow" VALUE="0" PRIMCOEFF="1.0/(D0*Kinvis)"/> Upon startup, this gives the error Fatal : Level 0 assertion violation Could not identify matrix type from dimension I havent come across this error before. Could someone point out what the error is? SIncerely, -- Amitvikram Dutta Graduate Research Assistant Fluid Mechanics Research Lab Multi-Physics Interaction Lab University of Waterloo _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users -- Amitvikram Dutta Graduate Research Assistant Fluid Mechanics Research Lab Multi-Physics Interaction Lab University of Waterloo _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@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@imperial.ac.uk<mailto:s.sherwin@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/
participants (2)
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Amitvikram Dutta
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Sherwin, Spencer J