******************* This email 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 https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* Dear All, I am trying to compare the performance of different expansion types. However, when I set TYPE="GLL_LAGRANGE_SEM", I get the following error: =======================================================================
EquationType: UnsteadyNavierStokes Session Name: MeshWith3PrismsLayers Spatial Dim.: 3 Max SEM Exp. Order: 5 Num. Processes: 128 Expansion Dim.: 3 Projection Type: Continuous Galerkin Advect. advancement: explicit Diffuse. advancement: implicit Time Step: 0.0005 No. of Steps: 1000000 Checkpoints (steps): 1000 Integration Type: IMEX Splitting Scheme: Velocity correction (strong press. form) ======================================================================= Initial Conditions: - Field u: 1.0 - Field v: 0.0 - Field w: 0.0 - Field p: 0.0 renaming "MeshWith3PrismsLayers_0.chk" -> "MeshWith3PrismsLayers_0.bak0.chk" Writing: "MeshWith3PrismsLayers_0.chk" (0.186233s, HDF5) [gra723:25064:0:25064] Caught signal 11 (Segmentation fault: address not mapped to object at address 0x3025)
Here is my setup: <?xml version="1.0" encoding="utf-8" ?>
<NEKTAR> <EXPANSIONS> <E COMPOSITE="C[30011]" NUMMODES="5" TYPE="GLL_LAGRANGE_SEM" FIELDS="u,v,w,p" /> </EXPANSIONS> <CONDITIONS> <FUNCTION NAME="InitialConditions"> <E VAR="u" VALUE="1.0" /> <E VAR="v,w,p" VALUE="0.0" /> </FUNCTION> <SOLVERINFO> <I PROPERTY="SolverType" VALUE="VelocityCorrectionScheme"/> <I PROPERTY="EqType" VALUE="UnsteadyNavierStokes" /> <I PROPERTY="Projection" VALUE="Continuous" /> <I PROPERTY="EvolutionOperator" VALUE="Nonlinear" /> <I PROPERTY="TimeIntegrationMethod" VALUE="IMEXOrder2" /> <I PROPERTY="GlobalSysSoln" VALUE="IterativeStaticCond" /> <I PROPERTY="Driver" VALUE="Standard" /> </SOLVERINFO> <GLOBALSYSSOLNINFO> <V VAR="u,v,w"> <I PROPERTY="GlobalSysSoln" VALUE="IterativeStaticCond" /> <I PROPERTY="Preconditioner" VALUE="LowEnergyBlock"/> <I PROPERTY="IterativeSolverTolerance" VALUE="1e-8"/> </V> <V VAR="p"> <I PROPERTY="GlobalSysSoln" VALUE="IterativeStaticCond" /> <I PROPERTY="Preconditioner" VALUE="FullLinearSpaceWithLowEnergyBlock"/> <I PROPERTY="IterativeSolverTolerance" VALUE="1e-7"/> </V> </GLOBALSYSSOLNINFO>
Everything works fine with TYPE="MODIFIED". Noteworthy, I tried TYPE="GLL_LAGRANGE_SEM" with the periodic pipe tutorial and it worked there, which is adding to my confusion! Could you kindly point out if something is wrong with my setup? Kind regards syavash