Download full text - ELSA - Europa

BOUNDARY CONDITIONS:
The vessel is entirely blocked along the top circle. The fluid-structure interaction is
automaticcaly modelled by the FSA directive along the fluid-vessel interface, and by
FSR along the external surface of the fluid (the cavity walls are supposed rigid).
LOADING:
The system is initially at rest, but not in equilibrium.
CALCULATION:
The calculation is performed up to 50 ms. At the final time, the vessel has undergone
large plastifications at the bottom and also near the top (water-hammer effect), and the
liquid water has invaded bothe the cavity and the external room.
RESULTS:
Although no comparison with experiments can be done on this problem, the results
appear physically correct.
POST-TREATMENT
Several animations of the computed results from this calculation are available on the
EUROPLEXUS Consortium Web site.
REFERENCES:
This calculation is detailed in:
F. Casadei: "Generalization of the Finite Element Model for Compressible Fluids in
PLEXIS-3C to Multi-Phase Flows." Technical Note N. I.97.33, March 1997.
(available on the EUROPLEXUS Consortium Web site).
Numerical Solution
CAVI51
The mesh generation file (K2000) is:
*%siz 300
opti echo 0;
opti donn 'D:\Users\Folco\plexis3c\proc\pxordpoi.proc';
opti donn 'D:\Users\Folco\plexis3c\proc\pxrota3d.proc';
opti donn 'D:\Users\Folco\plexis3c\proc\pxvolu3d.proc';
opti donn 'D:\Users\Folco\plexis3c\proc\px4to3.proc';
opti echo 1;
opti trac psc ftra 'vl_jrc_cavi51_mesh.ps';
*
opti titr 'CAVI - 51';
opti dime 3 elem cub8;
*
p0=0 0 0;
p1=2.35 0 0;
p2=2.35 0 11;
p3=2.20 0 11;p3p=p3 plus p0;
p4=2.35 0 3.9;
p5=2.20 0 3.9;p5p=p5 plus p0;
p6=0 0 1.7;p6p=p6 plus p0;
p7=0 0 1.45;
p8=0.6 0 0.85;
pcb=0 0 0.85;
pcv=0 0 3.9;
p9=0 0 0.25;
p10=0.709882641 0 1.817677586;
2