I build a model through a stl file, but the simulation results are out of my expect and the average energy shown in terminal is nan or -nan. I just wonder what it means. Does that mean the calculation can not converge? how can I adjust the simu parameters?
The xml file reads as follows:
3.7037e-06 1080 3.0-9 0 800 0.00062 1000 0 1.e-1
<!-- The STL geometry provided by the user has openings (inlets and outlets). It must not be provided by the user closed. --> <openings> <!-- 0 means x-direction, 1 means y-direction and 2 means z-direction. --> <sortDirection> 0 </sortDirection> <!-- According to the sortDirection, the user provides which openings are inlets and which are outlets. --> <type> Inlet Outlet </type> </openings>
<performOutput> True </performOutput> <doImages> True </doImages> <!-- Extrapolation scheme for the off lattice boundary condition. --> <useAllDirections> True </useAllDirections> <!-- Use an off lattice boundary condition which is closer in spirit to regularized boundary conditions. --> <useRegularizedWall> True </useRegularizedWall> <!-- Use an incompressible BGK model or the standard BGK model. --> <useIncompressible> True </useIncompressible> <!-- Use Poiseuille profile as an inflow boundary condition, or use a simple plug profile instead. --> <poiseuilleInlet> True </poiseuilleInlet> <convectiveScaling> False </convectiveScaling>