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

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

Hi Marco,

If you want to send .rea/.usr off-list, I'll take a look...

Best,
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 10:40 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: Re: [Nek5000-users] constant average velocity at inlet with    periodic        boundary conditions

Also, the heat equation is only solved in the fluid domain. I am only interested in the turbulent flow without heat equation for now.

Marco
> On Sep 6, 2016, at 10:44 AM, nek5000-users at lists.mcs.anl.gov wrote:
>
> 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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