Dear All,

I want to solve a constricted pipe flow problem (for Re=100) using Navier Stokes equation with steady-state solver of Nektar++. By reading the user guide of Nektar++ I prepared solver info and parameters part of my xml file for this purpose as seen below:

        <SOLVERINFO>
            <I PROPERTY="EQTYPE" VALUE="SteadyLinearisedNS" />
            <I PROPERTY="Projection" VALUE="Continuous" />
            <I PROPERTY="Driver" VALUE="SteadyState" />
            <I PROPERTY="TimeIntegrationMethod" VALUE="IMEXOrder1" />
        </SOLVERINFO>


        <PARAMETERS>
            <P> ControlCoeff  = 1   </P>
            <P> FilterWidth  = 1   </P>
            <P> TOL  = 10e-9   </P>
            <P> Kinvis        = 0.1   </P>
        </PARAMETERS>

When I tried to run an analysis I got such an error:

Fatal   : Level 0 assertion violation
EquationSystem 'SteadyLinearisedNS' is not defined.
Ensure equation name is correct and module is compiled.

I also tried other equation types (Steady Stokes, Unsteady NS etc.) What is the source of this error?

I also want to ask if it is possible to write a history file for steady solutions?

Regards,
Kamil