Common

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Variables
Common
General module for specific physics
Collaboration diagram for Common:

## Variables
integer, save | irun
| alias for boundary conditions More...
integer, save | irunh
| alias for boundary conditions More...
double precision, save | cv0
| additional property More...
double precision, save | viscv0
| reference volume viscosity (noted in the equation expressing in the paragraph dedicated to iviscv) always useful, it is the used value, unless the user specifies the volume viscosity in the user subroutine uscfpv More...
integer, save | ippred
| pressure predicion by an evolution equation More...
integer, save | igrdpp
| indicates whether the pressure should be updated (=1) or not (=0) after the solution of the acoustic equation always usef More...
integer, save | icfgrp
| indicates if the boundary conditions should take into account (=1) or not (=0) the hydrostatic balance. More...

## Detailed Description

## Variable Documentation

double precision, save cv0

additional property

integer, save icfgrp

indicates if the boundary conditions should take into account (=1) or not (=0) the hydrostatic balance.

Always useful.

In the cases where gravity is predominant, taking into account the hydrostatic pressure allows to get rid of the disturbances which may appear near the horizontal walls when the flow is little convective.

Otherwise, when icfgrp=0, the pressure condition is calculated from the solution of the unidimensional Euler equations for a perfect gas near a wall, for the variables "normal velocity", "density" and "pressure":

Case of an expansion (M <= 0):

Case of a schock (M > 0):

with , internal Mach number calculated with the variables taken in the cell.

integer, save igrdpp

indicates whether the pressure should be updated (=1) or not (=0) after the solution of the acoustic equation always usef

integer, save ippred

pressure predicion by an evolution equation

integer, save irun

alias for boundary conditions

integer, save irunh

alias for boundary conditions

double precision, save viscv0

reference volume viscosity (noted in the equation expressing in the paragraph dedicated to iviscv) always useful, it is the used value, unless the user specifies the volume viscosity in the user subroutine uscfpv