TITLE : TANK WITH HEAVY LIQUID IN A SHOCK TUBE

BY : CHAM development team

FOR : Demonstration Case

DATE : 1999

PHOENICS Version : 3.2

DETAILS :

• Two-Dimensional transient flow
• Cartesian axi-symmetric computational grid

NOTES :

• High-pressure air is separated from low-pressure air by a diaphragm at the top-section of a tube with closed ends.
• Tank open to the air and containing heavy liquid is located at the bottom.
• The diaphragm suddenly breaks.
• The subsequent distributions of velocity and pressure are predicted.
• The analysis is two-dimensional, and the process is supposed to be isentropic, ie without either friction or heat transfer.
• The liquid free-surface is modelled using the Extended Scalar Equation Method.

The following animated pictures show the propagation of shock wave, by velocity vectors, and evolution of the free-surface contour indicated by yellow curve at successive times.

Velocity and free-surface evolution.

As above but for different shock pressure.

Unsteady pressure fields.