Hi Hongtao,


I don't know the reason for large pressure but you can use a localised initial disturbance, for example

<FUNCTION NAME="InitialConditions">

    <E VAR="u" VALUE="1" />

    <E VAR="v" VALUE="0.2 * exp(-x*x-y*y)" />

    <E VAR="p" VALUE="0" />

</FUNCTION>


You may missing some bracket in your filter, such as <FILTER TYPE="AeroForces">  ... </FILTER>

I attached one file I am using for your reference.


Best

Ankang Gao

Research Associate
Department of modern mechanics
University of Science and Technology of China



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To: nektar-users <nektar-users@imperial.ac.uk>
Subject: [Nektar-users] Cylinder-Base terminal error question

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Dear nektar++ users and developers,

I am using the base in the flow-stability-cylinder for calculations, and I want to accelerate the appearance of vortices by setting the initial conditions to (1, 0.2, 0). However, the pressure error in the final results is very large, and the filter does not output a file. I would like to know why this is happening. XML file attachment.



Hongtao