6.3 Session file configuration

Parameters

Under this section it is possible to set the parameters of the simulation.

1<PARAMETERS> 
2  <P> TimeStep       = 1e-05  /P> 
3  <P> NumSteps       = 1000   /P> 
4  <P> FinTime        = 0.01   /P> 
5  <P> IO_CheckSteps  = 100    /P> 
6  <P> IO_InfoSteps   = 10     /P> 
7  <P> IO_CFLSteps    = 10     /P> 
8</PARAMETERS>

6.3.1 Time Integration Scheme

1<TIMEINTEGRATIONSCHEME> 
2  <METHOD> RungeKutta </METHOD> 
3  <VARIANT> SSP </VARIANT> 
4  <ORDER> 3 </ORDER> 
5</TIMEINTEGRATIONSCHEME>

6.3.2 Solver Info

1<SOLVERINFO> 
2  <I PROPERTY="EQType"                VALUE="APE"                  /> 
3  <I PROPERTY="Projection"            VALUE="DisContinuous"        /> 
4  <I PROPERTY="UpwindType"            VALUE="LaxFriedrichs"        /> 
5</SOLVERINFO>

6.3.3 Variables

For the APE operator, the acoustic pressure and velocity perturbations are solved, e.g.:

1<VARIABLES> 
2  <V ID="0"> p </V> 
3  <V ID="1"> u </V> 
4  <V ID="2"> v </V> 
5  <V ID="3"> w </V> 
6</VARIABLES>

The LEE use a conservative formulation and introduce the additional density perturbation:

1<VARIABLES> 
2  <V ID="0"> p    </V> 
3  <V ID="1"> rho  </V> 
4  <V ID="2"> rhou </V> 
5  <V ID="3"> rhov </V> 
6  <V ID="4"> rhow </V> 
7</VARIABLES>

6.3.4 Functions

6.3.5 Boundary Conditions

In addition to plain Dirichlet and Neumann boundary conditions, the AcousticSolver features a slip-wall boundary condition, a non-reflecting boundary and a white noise boundary condition.