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Hi guys,
In the expression below, as I understood correctly, you can change the order of the polynomial. How can I can change the distribution of the nodes inside the element i.e. Gauss Lobatto, Legendre Gauss Lobatto or Equidistant Spacing? Thanks a lot for your help guys.
<EXPANSIONS>
<E COMPOSITE="C[100]" NUMMODES="3" FIELDS="rho,rhou,rhov,rhow,E" TYPE="MODIFIED" />
</EXPANSIONS?
Cheers, Andrei
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Hello Nektar++ Users,
I am curious about how to best post-process simulated high-order results
from Nektar++. I tried using Paraview to generate the contour plot of the
vorticity field, but it seems quite blurry, which is due to, in my
understanding, that Paraview uses linear interpolation to interpret the
high-order results. I am currently using Matlab to generate the contour
plot with high-order interpolations from a for-loop of the element-wise
results, but it requires a lot of tweaking, calculation time, and data
extraction. Do you have some advice on the post-processing of high-order
results from Nektar++? Much appreciated.
Thanks,
Yong Wang
Ph.D. Candidate
National Wind Institue
Texas Tech University
Lubbock, TX, US
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Dear all,
I’m a Ph.D. student in Istanbul Technical University and trying to learn more about Nektar++ to use it in my future doctorate thesis. I have done all the tutorials that given to users by Nektar++ (in official website) but confused about creating and/or obtaining a restart file (*.rst).
For example, in Flow Stability – Channel tutorial, a restart file (Channel-VCS.rst in the Stability folder) was provided to users but i could not understand how it can be created or obtained for other simulations. I read its definition and understand the differences between Channel-VCS.bse and Channel-VCS.rst (the latter one contains eingenvalues/eingenmodes of the system). I would be very grateful if you could help me understand.
Sincerely yours.
Selman Baysal
R. A. in Hydraulics
Dept. of Civil Eng’g
Çanakkale Onsekiz Mart University <>
—
ITU Civil Eng., BSc.
ITU Coastal Sci. & Eng., MSc.
Gsm: +905436180777
—
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Dear all,
I would like to have some clarification on how the Robin Boundary Conditions work on Nektar++. In particular, I would like to know how the normal derivative is calculated on a curved surface, where the normal to the surface is in the radial direction.
Please find attached notes.pdf, where I try to explain myself a bit better. I hope my question it is clear enough.
Thank you for your help.
Kind regards,
Silvia
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Dear all,
I am a beginner of Nektar++. I prepared to install the Nektar++ at Ubuntu 18.04. However, some problem have occurred when I installed the source package. When running the "ccmake ..", a Cmake error happened where it said "cannot build scotch". Actually, I have install the scotch lib. I have attached the screenshot, would anyone give me any suggestions?
With best wishes!
Li-Ming
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Hi all,
I have a linear multiblock structured mesh generated in Icem Hexa and I would like to know if NekMesh could be used to curve external linear meshes. Thanks a lot and looking forward to hearing from you.
Cheers, Andrei
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The data contained in, or attached to, this e-mail, may contain confidential information. If you have received it in error you should notify the sender immediately by reply e-mail, delete the message from your system and contact +44 (0) 3301235850 (Security Operations Centre) if you need assistance. Please do not copy it for any purpose, or disclose its contents to any other person.
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Hi All,
I have an issue running the incompressible solver in parallel.
I compiled Nektar++ with the flag NEKTAR_USE_MPI set to ON but when I
execute my case with the command:
mpirun -np 8 IncNavierStokesSolver session_s1223.xml
I got the following error message:
Fatal : Level 0 assertion violation
A parallel solver must be used when run in parallel.
-------------------------------------------------------
Primary job terminated normally, but 1 process returned
a non-zero exit code.. Per user-direction, the job has been aborted.
-------------------------------------------------------
--------------------------------------------------------------------------
mpirun detected that one or more processes exited with non-zero status,
thus causing
the job to be terminated. The first process to do so was:
Process name: [[30155,1],0]
Exit code: 1
Can you please help me to resolve this issue?
Regards,
Eli
Dear all,
We are pleased to announce the release of Nektar++ v5.0.1. With this
update, we now have binary packages for a range of Linux distributions
including recent versions of Debian, Ubuntu, CentOS and Fedora, which
will continue to be updated with each new release. Installation
instructions for our binary packages are available in the user guide.
This release includes a number of bug fixes to the 5.0 release:
**Library**
- Fix incorrect coordinate dimension used in history point filter (!1118)
- Added checked conversion from double to int in SessionReader (!1113)
- Fix compile errors with GCC 9.x (!1108)
- Correct the Energy/Enstropy integral for the 3DH1 flow (!1132)
- Added IsRealEqual method to compare real numbers with relative
tolerance. Started using it in SharedArray and in NekMesh to fix
peralign-extrude tool chain (!1134)
- Fix Collection unit tests (!1160)
- Fix periodic boundary conditions with HDF5 input file (!1163)
- Fix performance of GetExp(coord) by using octree lookup (!1165)
- Fix DESTDIR issues for MacPorts (!1179)
**IncNavierStokesSolver**
- Change the baseflow time in the Adjoint advection (!1133)
**FieldConvert**
- Fix OutputTecplot skipping final plane in 3DH1D (!1016)
**NekMesh**
- Fix compile errors when using intel cc (!1114)
**Documentation**
- Fix error in compilation of developer guide (!1136)
**CI**
- Added checked conversion from double to int in SessionReader (!1113)
- Switched to Gitlab CI (!1120, !1120, !1128, !1129, !1131, !1141)
- Updated bullseye build to remove UCX components (!1203)
- Added automated packaging for Linxu distributions (!1206)
As always, if you encounter any problems please feel free to contact us
on the mailing list nektar-users(a)imperial.ac.uk.
Cheers,
Chris
--
Chris Cantwell
Senior Lecturer in Aeronautics
Department of Aeronautics
Imperial College London
South Kensington Campus
London SW7 2AZ
Tel: +44 (0)20 759 45050
Email: c.cantwell(a)imperial.ac.uk
www.imperial.ac.uk/people/c.cantwell
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Hi all
Please don't take account my previous email, there is a solution to my
issue on the forum.
Thanks
Mr Frydman
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Hi all,
I tried to get a mesh for the naca airfoil example in the directory
nektar++-5.0.0/utilities/NekMesh/Tests/MeshGen/NACA using the command :
NekMesh -v 2d_bl.mcf mesh.xml
But i got the following error message:
terminate called after throwing an instance of 'Nektar::ErrorUtil::NekError'
what(): Level 0 assertion violation
No such module: Input: mcf
Can you please help me with this issue.
Thank you
Mr Frydman