On Wed., Dec. 4, 2019, 11:43 a.m. Sherwin, Spencer J, <s.sherwin@imperial.ac.uk> wrote:

Hi Stan, Josuel,

I think we have had a few people play with the SFD (Mohammad is currently trying it) however if you are able to get the steady state by simply time marking the flow then that will likely be quicker. The SFD is more useful if you cannot get the steady state overwise.

I am not aware that we managed to get the full Newton iteration to run correctly since it needs a good initial condition.

Cheers,
Spencer.

> On 4 Dec 2019, at 09:32, Stanisław Gepner <sgepner@meil.pw.edu.pl> wrote:
>
>
> *******************
> This email from sgepner@meil.pw.edu.pl originated outside Imperial.
> *******************
> Hi Josuel,
>
> I would suggest using the Standard Driver and time integrate to the
> steady state solution. In my experience this is faster and easier to do
> than to use the SFD method.
>
> Possibly, someone has had success with the SteadyState driver and can
> share a secret?
>
> Cheers,
> Stan
>
> On pon, 2019-12-02 at 21:37 -0500, Josuel Kruppa Rogenski wrote:
>> *******************
>> This email from josuelkr@gmail.com originated outside Imperial.
>> *******************
>> Dear Nektar users,
>>
>> I am doing some tests using IncNavierStokes solver + steady driver
>> (with
>> default parameters) + periodic boundary conditions.
>>
>> I wonder if someone has to take some extra care if one of the
>> boundaries is
>> similar to a sawtooth wave, as an example.
>>
>> Specifically, I took initially a 2D-Couette flow. After that, I
>> substituted
>> one of the flat walls to a tilted small square step. Results seems to
>> be
>> nonphysical.
>> I played with different meshes and time integration methods but could
>> not
>> draw any conclusion.
>>
>> My .xml file solver info is:
>> <SOLVERINFO>
>> > VALUE="VelocityCorrectionScheme"/>
>> 
>> 
>> 
>> 
>> 
>> </SOLVERINFO>
>>
>> <EXPANSIONS>
>> <E COMPOSITE="C[0]" NUMMODES="12" TYPE="MODIFIED"
>> FIELDS="u,v,p" />
>> </EXPANSIONS>
>>
>> Any help would be appreciated. Thank you in advance,
>> J
>>
>> PS: I can provide .xml and .geo files I am working with if necessary.
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>
>
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Spencer Sherwin FREng, FRAeS
Head, Aerodynamics,
Director of Research Computing Service,
Professor of Computational Fluid Mechanics,
Department of Aeronautics,
s.sherwin@imperial.ac.uk South Kensington Campus,
Phone: +44 (0)20 7594 5052 Imperial College London,
Fax: +44 (0)20 7594 1974 London, SW7 2AZ, UK
http://www.imperial.ac.uk/people/s.sherwin/

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