Hi Shujie, Adaptation will be applied at the end of a run, which consists of “NumSteps” steps. You will need to set a “NumRuns” higher than 1 so that the simulation is continues after adapting at the end of the first run. See the user guide (http://doc.nektar.info/userguide/latest/user-guidese46.html#x63-26200010.7) for more information. Best, Julian Marcon Early Stage Researcher Department of Aeronautics / Aerodynamics Section Imperial College London, City and Guilds Building, Room 420 London SW7 2AZ, United Kingdom Mob.: +44 (0)7449 121911<tel:+447449121911> From: nektar-users-bounces@imperial.ac.uk <nektar-users-bounces@imperial.ac.uk> On Behalf Of ??? Sent: 14 July 2019 17:05 To: nektar-users <nektar-users@imperial.ac.uk> Subject: [Nektar-users] p adaption for compressible flow solver Hi All, I am using Nektar++ compressible flow solver. I noticed the p-adaptive algorithm can be used to optimize the computational cost. I have read the user guide but I still do not know how to perform it. I just add the AdaptiveModes and AdaptiveMinModes in the parameters. The SolverInfo like this: <SOLVERINFO> <I PROPERTY="EQTYPE" VALUE="EulerCFE" /> <I PROPERTY="Projection" VALUE="DisContinuous" /> <I PROPERTY="TimeIntegrationMethod" VALUE="ClassicalRungeKutta4" /> <I PROPERTY="UpwindType" VALUE="Roe"/> <I PROPERTY="Driver" VALUE="Adaptive" /> </SOLVERINFO> I use FieldConver -m nummodes to see the polynomial order distributions. But it seems the polynomial order is not changed in the fields. Does anyone familiar with it? I found a paper in 2013 about an inviscid transonic flow past a NACA0012 airfoil. I think this approach can be done by compressible flow solver. Many thanks for your help! Shujie University of Southampton