Hi Alex,

The direct solver solves the global linear system in the spectral element problem, like A x = b.
In the incompressible flow solver, the nonlinear advection term is treated as a part of the right-hand-side term b.
So, the direct solver can be used in adjoint advection problems.

Cheers
Ankang

From: nektar-users-bounces@imperial.ac.uk <nektar-users-bounces@imperial.ac.uk> on behalf of A.P. <k210@list.ru>
Sent: 31 July 2021 16:45
To: nektar-users <nektar-users@imperial.ac.uk>
Subject: [Nektar-users] direct solver adjoint advection?
 

This email from k210@list.ru originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list to disable email stamping for this address.

 

Hello,
 
does the direct solver support adjoint advection:
 
            <I PROPERTY="SolverType" VALUE="CoupledLinearisedNS" />
            <I PROPERTY="EQTYPE" VALUE="SteadyLinearisedNS" />
            <I PROPERTY="EvolutionOperator" VALUE="Adjoint" />
 
Alex Proskurin
Altai state technical university