[Nek5000-users] constant average velocity at inlet with periodic boundary conditions

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

Paul,

there is no heat added to the flow but I do have IFHEAT set to true in the rea file. The temperature profile does not vary though.

Marco
> On Sep 6, 2016, at 10:19 AM, nek5000-users at lists.mcs.anl.gov wrote:
> 
> Hi Marco,
> 
> Does this have conjugate heat transfer ?
> 
> Paul
> 
> ________________________________________
> From: nek5000-users-bounces at lists.mcs.anl.gov [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: Tuesday, September 06, 2016 8:39 AM
> To: nek5000-users at lists.mcs.anl.gov
> Subject: [Nek5000-users] constant average velocity at inlet with periodic       boundary conditions
> 
> Dear nek users,
> 
> I am simulating the flow in a 7 pin bundle mesh with periodic boundary conditions in Nek5000 and set the parameters p054 and p055 to -3 and 1, respectively. With these settings, the average velocity should be 1 in the geometry. This is however not what I am seeing; the maximum velocity is around 0.32.
> 
> I used the same set up for a 3-D pipe and the numerical solution behaves as expected.
> 
> Does anybody has details on how the fix mass flow rate/volumetric velocity are enforced in Nek5000?
> 
> Thanks,
> Marco
> 
> 
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