[Nek5000-users] Different velocity values in different 'v' inlets
nek5000-users at lists.mcs.anl.gov
nek5000-users at lists.mcs.anl.gov
Sun Dec 31 13:18:06 CST 2017
What is the variable e in userbc?
On 31 Dec 2017, at 19:35, "nek5000-users at lists.mcs.anl.gov <mailto:nek5000-users at lists.mcs.anl.gov> " <nek5000-users at lists.mcs.anl.gov <mailto:nek5000-users at lists.mcs.anl.gov> > wrote:
Hi all,
I'm trying to simulate a shear-layer which involves two different jets emerging at different velocities. The simulation is 2D for now. The width of the first jet extends from y=0.0 to y=1.0 and the second extends from y=1.0 to y=3.0
I generated a mesh using genbox with 'v' BCs for both inlets.
In the .usr file I have the following form for usrbc
subroutine userbc (ix,iy,iz,iside,ieg)
c NOTE ::: This subroutine MAY NOT be called by every process
include 'SIZE'
include 'TOTAL'
include 'NEKUSE'
if (ym1(i,j,k,e).lt.1) then
ux=10.0
elseif (ym1(i,j,k,e).gt.1) then
ux=1.0
endif
ux=1.0
uy=0.0
uz=0.0
temp=0.0
return
end
As you can see I try assigning ux = 10.0 and 1.0 to the different zones. However the results show a uniform value of 1.0 across both the inlets.
What am I missing here?
Sincerely,
--
Amitvikram Dutta
Graduate Research Assistant
Fluid Mechanics Research Lab
Multi-Physics Interaction Lab
University of Waterloo
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