[Nek5000-users] Computing RHS for linearized NS

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

Hi Praveen

We have implemented arpack to calculate spectra of the linearised direct 
and adjoint Navier-Stokes equations for relatively complex flow 
configurations. Some results you can find at 
http://www.sciencedirect.com/science/article/pii/S0997754614001009 
(Global stability and optimal perturbation for a jet in cross-flow). We 
are going to talk about ot the aspects on the nek user meeting in 
Greece? Are you going to participate?
Regards
Adam


On 08/08/14 08:40, nek5000-users at lists.mcs.anl.gov wrote:
> Dear neks
>
> I want to compute the rhs of the linearized Navier-Stokes equation 
> which would be of the form
>
> M du/dt = A(us) u + Bp
> 0 = B^T u
>
> where us is the stationary solution about which the equations are 
> linearized.  I want to use ARPACK to compute eigenvalues for which I 
> need to be able to compute the above matrix-vector products. Is this 
> already available in some part of nek. I have tried to read perturb.f 
> but have not succeeded in clearly understanding the code.
>
> Thanks
> praveen
>
>
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