[Nek5000-users] Low Mach Number solver

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

Hi Stefan,

Thanks for your reply.

Regards,
Pradeep


> ---------- Forwarded message ----------
> From: nek5000-users at lists.mcs.anl.gov
> To: <nek5000-users at lists.mcs.anl.gov>
> Date: Tue, 10 Aug 2010 22:27:06 +0200
> Subject: Re: [Nek5000-users] Low Mach Number solver
> Hi Pradeep,
>
> you'll find all details about the implemented Low Mach number algorithm in:
>
> A.G. Tomboulides, J.C.Y. Lee, and S.A. Orzag. Numerical Simulation of Low
> Mach Number Reactive Flows. Journal of Scientific Computing, 1997:139–167,
> 12.
>
> Only the thermodynamic pressure (p0) matters for the thermodynamic
> properties (e.g. density).
> p0 is constant in space, in fact the current implementation makes the
> assumption that p0 is constant (open system).
>
> Please note that the prenek is quite outdated and does not support all new
> features (e.g. Low Mach number formulation). We're working on more power
> meshing options which will replace prenek at some point.
>
> hth,
> Stefan
>
>
>
> On Aug 10, 2010, at 5:50 PM, <nek5000-users at lists.mcs.anl.gov> wrote:
>
> > Hi,
> >
> > I am new to Nek5000, and had a question regarding the Low Mach Number
> solver.
> >
> > Does the Low Mach Number solver use an algorithm that splits pressure
> into a time dependent, but spatially independent component (
> P_thermodynamic, used to calculate the density), and a spatially and time
> dependent component?
> > If so, what is the variable name for P_thermodynamic?
> >
> > If you use another algorithm, could you please point me to a paper that
> explains it (if there is one). (The examples doc from the Nek5000 wiki
> currently doesn't have this info.)
> >
> > I am asking this to be able to correctly set/calculate rho*cp (UTRANS) in
> the uservp subroutine.
> >
> > Also, I am not directly able to enable the IFLOMACH option using prenek.
> (I need to change it manually in the .rea file by replacing the existing
> parameters with the ones from the lowMach_test example). I am currently
> using the version 2.6099999 of Nekton and the version of prenek that came
> with that. Is this something that will be implemented later?
> >
> > Thanks,
> > Pradeep
> >
> > _______________________________________________
> > Nek5000-users mailing list
> > Nek5000-users at lists.mcs.anl.gov
> > https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
>
>
>
>
> ---------- Forwarded message ----------
> From: nek5000-users at lists.mcs.anl.gov
> To: nek5000-users at lists.mcs.anl.gov
> Date: Wed, 11 Aug 2010 08:03:01 -0500 (CDT)
> Subject: Re: [Nek5000-users] Smooth Restart feature in Nek
>
> Shriram,
>
> Attached is a full-restart routine.   You need to update the repo
> to use it.  It seems to work ok - hopefully the remarks in the attached
> .usr file are clear.
>
> Paul
>
> On Mon, 9 Aug 2010, nek5000-users at lists.mcs.anl.gov wrote:
>
>  Hi Paul,
>>
>> Thanks a lot. That would be very helpful.
>>
>> Regards
>> Shriram
>>
>
> _______________________________________________
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> Nek5000-users at lists.mcs.anl.gov
> https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
>
>


-- 
Pradeep C. Rao
Graduate Research Assistant for FT2L (http://www1.mengr.tamu.edu/FT2L/)
Department of Mechanical Engineering
Texas A&M University
College Station, TX 77843-3123

428 Engineering Physics Building
(713) 210-9769
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