Development of the films code

A lack of sufficiently accurate and detailed numerical tools for analysis of incompressible fluids has lead to development of the FInite-element Liquid Motion Simulation (FILMS) code. This program was written primarily to simulate fluid motion in spacecraft surface tension propellant tanks, but is also capable of modelling flow around and through internal tank structures and propellant line fittings. Although still in the final stages of development, the code has demonstrated acceptable simulation of unforced lateral slosh in spherical tanks. Expansion in the number of allowable fluid elements is expected to further improve the correlation between numerical and experimental results. Efficient program structure has allowed optimization for execution on a CRAY 1-S/1000 computer and will facilitate eventual incorporation of surface tension effects.