[Nek5000-users] volumetric heat source w/ inflow

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

Hi Aleks,
As a follow up on the following post, I just wanted to note that the  
results of Nek's version of my setup agreed exactly with the MOAB  
counterpart, and so the aforementioned issue has different origin.

Thanks,
Mohsen

On 10-Jun-14, at 1:55 PM, Mohsen Behzad wrote:

> Thanks Aleks for your suggestion.
> So you think it might be because of some issue with MOAB. I'll  
> check this out, though, apparently, I haven't had any problem  
> reading the mesh and sidesets into Nek via MOAB.
>
> Mohsen
>
>
> On 10-Jun-14, at 12:27 PM, <nek5000-users at lists.mcs.anl.gov> wrote:
>
>> Hi Mohsen,
>>
>> One way I usually check my MOAB setups is by running the Nek's  
>> version of it.
>>
>> For this one needs to get Mesh & BC by calling gen_rea(2) from say  
>> userchk, add the missing parameters to create .rea file, run  
>> genmap for .map file and fill q array in userq2() routine by  
>> calling the latter from userq() say once per timestep
>>
>> Aleks
>>
>>
>>
>> ________________________________________
>> 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, June 10, 2014 11:03 AM
>> To: nek5000-users at lists.mcs.anl.gov
>> Subject: Re: [Nek5000-users] volumetric heat source w/ inflow
>>
>> Hi Aleks,
>> I should have mentioned in my previous email that I am actually using
>> MOAB.
>>
>> Thanks,
>> Mohsen
>>
>> On 10-Jun-14, at 12:01 PM, <nek5000-users at lists.mcs.anl.gov> wrote:
>>
>>> Hi Mohsen,
>>>
>>> userq2 is used only with MOAB -- use qvol in userq instead -- see,
>>> e.g. examples/conj_ht/conj_ht.usr but without condition on nelgv
>>>
>>> Best.
>>> Aleks
>>>
>>>
>>> ________________________________________
>>> 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, June 10, 2014 10:16 AM
>>> To: Nek 5000
>>> Subject: [Nek5000-users] volumetric heat source w/ inflow
>>>
>>> Hello all,
>>> I am working on a problem consisting of an axially-horizontal
>>> cylindrical tank with an inlet (an opening) at its top and a
>>> connected pipe to its bottom as an outlet. The boundary conditions
>>> are set accordingly, i.e., inflow and outflow, respectively.  
>>> There is
>>> no problem with isothermal simulation of such configuration.  
>>> However,
>>> when volumetric heat source is added to the fluid domain (via userq2
>>> subroutine), non-physical temperatures have been observed at the
>>> walls (w/ adiabatic BC) in the immediate vicinity of the inflow (w/
>>> Dirichlet temperature BC). In fact, the element nodes close to the
>>> inlet have very high or very low temperatures, which are no  
>>> expected.
>>>
>>> I am wondering if anyone has any experience/hint on this issue.
>>>
>>> Thanks,
>>> Mohsen
>>>
>>>
>>>
>>> _______________________________________________
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>>> Nek5000-users at lists.mcs.anl.gov
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>>
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