[Nek5000-users] Linearised Navier Stokes

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

Are you using the latest git version? If so, I think I cannot give you 
the procedure as my knowledge is a bit old. But I can ask Adam next week 
to give you these instructions. Sorry about that.

But in general, the buoyancy forcing for the perturbations should go 
into userf as it does for the base-flow calculation.

Or perhaps somebody else could give the guidelines for the new release?

Philipp

On 2017-08-10 15:01, nek5000-users at lists.mcs.anl.gov wrote:
> Hi Philipp,
> 
>       Can you please outline the procedure to be followed for
> calculating the perturbed velocity and temperature field based on the
> following information.
> 
>      I have a 3d annulus domain with vertical gravity pointing downward
> and temperature gradient in the radial direction.
> This leads to a base flow about which I have to linearize the problem.
> Please let me know how to include the information of the base flow and
> base temperature gradient into the perturbation calculations.
> 
> Thank you
> Swarandeep
> 
> On Thu, Aug 10, 2017 at 5:51 PM,  <nek5000-users at lists.mcs.anl.gov> wrote:
>> Hi,
>> the linearised version is included in the main version of the code. You
>> activate perturbations by setting NPERT different from zero. The relevant
>> routines in the code are collected in the file perturb.f.
>>
>> Hope this helps,
>> philipp
>>
>>
>> On 2017-08-10 12:56, nek5000-users at lists.mcs.anl.gov wrote:
>>>
>>> Hi Nek Forum,
>>>
>>>       How to obtain the linearised version of the Nek5000 code. Please
>>> advice.
>>>
>>> Thanks
>>>    Swarandeep
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