difficulty in following the fluid motion. Pressures measured at the center of the floor are compared with the corresponding calculated pressures in Fig. 14. The agreement is reasonably good, except for some of the details associated with the initial pressure spike. There is some experimental evidence that the higher first spike and subsequent small second spike are results of elastic flexibility in the apparatus, which was not included in the calculation. Similar results have also been obtained for many other test conditions and for other measured quantities [22]. Since these results have been reported in detail in the quoted references, they are not reproduced here. Neverthesless, these results serve to further validate the SOLA-VOF code as a powerful and useful research tool.