[Nek5000-users] How to give NEK5000 boundary conditions to exodus mesh file
nek5000-users at lists.mcs.anl.gov
nek5000-users at lists.mcs.anl.gov
Thu May 31 08:22:49 CDT 2018
Did you generate a new map file after changing the BCs?
This matters when switching periodic bcs on or off...
Paul
________________________________
From: Nek5000-users <nek5000-users-bounces at lists.mcs.anl.gov> on behalf of nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
Sent: Thursday, May 31, 2018 8:12:55 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: Re: [Nek5000-users] How to give NEK5000 boundary conditions to exodus mesh file
I do not think this method supports periodic boundary conditions. You will have to replace the periodic boundary conditions with wall boundary conditions and see it is runs.
Marco
On May 31, 2018, at 9:11 AM, nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov> wrote:
Hi Marco,
I tried and it compiled . But before starting the time step it failed.
Its a very simple case, the water flowing throgh a cube. So I have inlet, outlet, walls on upside and bottom and periodic conditions on side walls.
I get this error:
Matrix: 0 aa 6 6 6
0 aa 8.33333E+01 -4.87842E+01 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00
0 aa -4.87842E+01 8.66667E+01 -4.87842E+01 7.11752E+00 -1.66667E+00 0.00000E+00
0 aa 0.00000E+00 -4.87842E+01 8.33333E+01 -4.16667E+01 7.11752E+00 0.00000E+00
0 aa 0.00000E+00 7.11752E+00 -4.16667E+01 8.33333E+01 -4.87842E+01 0.00000E+00
0 aa 0.00000E+00 -1.66667E+00 7.11752E+00 -4.87842E+01 Infinity -Infinity
0 aa 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 -Infinity Infinity
Matrix: 0 bb 6 6 6
0 bb 4.16667E-02 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00
0 bb 0.00000E+00 1.66667E-02 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00
0 bb 0.00000E+00 0.00000E+00 4.16667E-02 0.00000E+00 0.00000E+00 0.00000E+00
0 bb 0.00000E+00 0.00000E+00 0.00000E+00 4.16667E-02 0.00000E+00 0.00000E+00
0 bb 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 8.33333E-03 0.00000E+00
0 bb 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00
Matrix: 0 Aeig 6 6 6
0 Aeig 8.33333E+01 -4.87842E+01 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00
0 Aeig -4.87842E+01 8.66667E+01 -4.87842E+01 7.11752E+00 -1.66667E+00 0.00000E+00
0 Aeig 0.00000E+00 -4.87842E+01 8.33333E+01 -4.16667E+01 7.11752E+00 0.00000E+00
0 Aeig 0.00000E+00 7.11752E+00 -4.16667E+01 8.33333E+01 -4.87842E+01 0.00000E+00
0 Aeig 0.00000E+00 -1.66667E+00 7.11752E+00 -4.87842E+01 Infinity -Infinity
0 Aeig 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 -Infinity Infinity
Matrix: 0 Deig 1 6 6
0 Deig 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00
Error in generalev, info= 12 6 -6
an error occured: dying ...
Could you please tell me why?
Thank you
Sijo GEORGE
________________________________
De: "nek5000-users" <nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov>>
À: "nek5000-users" <nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov>>
Envoyé: Jeudi 31 Mai 2018 14:52:40
Objet: Re: [Nek5000-users] How to give NEK5000 boundary conditions to exodus mesh file
I specify the boundary conditions in the usrdat subroutine using the following piece of code
do i=1,nelt
do j=1,2*ndim
if(bc(5,j,i,1).eq.1) then
cbc(j,i,1)='mv '
elseif(bc(5,j,i,1).eq.2) then
cbc(j,i,1)='W '
elseif(bc(5,j,i,1).eq.3) then
cbc(j,i,1)='W '
elseif(bc(5,j,i,1).eq.4) then
cbc(j,i,1)='W '
else
cbc(j,i,1)='E '
endif
enddo
enddo
Marco
On May 31, 2018, at 8:50 AM, nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov> wrote:
Hi Neks,
I did the conversion of a mesh from ICEM to exodus file then to re2 file.
But I am bit confused on the boundary conditions. Because from ICEM before I export to exodus I give the B.Cs as side set numbers and after the conversion to re2 I wont be able to put the boundary conditions in NEK format.
So could you please tell me how you put the BC in NEK5000 format to a mesh file with exodus format.
Thank you
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