SQUEEZE FILM FORCE MODELING FOR LARGE-AMPLITUDE MOTION USING AN ELLIPTIC VELOCITY PROFILE

With the aim of seeking a more reasonable solution for the squeeze fil m force for large amplitude motion with low viscosity fluids, an ellip tical velocity profile and the corresponding squeeze film force equati ons ale derived far a two dimensional rectangular plate model using th ree different approximation methods. Through comparisons with existing theoretical studies which use parabolic velocity profiles for moderat e to large Reynolds numbers, it is shown that the squeeze film model u sing the elliptical profile may be closer to reality. The force level of the dominant temporal inertia component using the elliptical profil e (with either the iterative or the energy methods) is between that ob tained using the traditional parabolic profile with the momentum metho d and that obtained with either the iterative or the energy methods.