[Nek5000-users] How to give NEK5000 boundary conditions to exodus mesh file

[nek5000-users at lists.mcs.anl.gov]

Perfect. i will give a try Thanks Marco. 



De: "nek5000-users" <nek5000-users at lists.mcs.anl.gov> 
À: "nek5000-users" <nek5000-users at lists.mcs.anl.gov> 
Envoyé: Jeudi 31 Mai 2018 14:58:17 
Objet: Re: [Nek5000-users] How to give NEK5000 boundary conditions to exodus mesh file 

Yes, you are correct. 1, 2, .. are the boundary indices in your exodus file. The ‘1’ in bc(5,j,i,1) refers to the velocity field. 

Marco 




On May 31, 2018, at 8:56 AM, [ mailto:nek5000-users at lists.mcs.anl.gov | 
nek5000-users at lists.mcs.anl.gov ] wrote: 

Thank you . 

So here the 1,2,3,4 refers to the Side set numbers that we give as B.C in ICEM? 

Thank you very much 

Sijo 



De: "nek5000-users" < [ mailto:nek5000-users at lists.mcs.anl.gov | nek5000-users at lists.mcs.anl.gov ] > 
À: "nek5000-users" < [ mailto:nek5000-users at lists.mcs.anl.gov | 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 


BQ_BEGIN

On May 31, 2018, at 8:50 AM, [ mailto:nek5000-users at lists.mcs.anl.gov | 
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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