[Nek5000-users] volumetric heat source w/ inflow

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

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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