Shift in added mass and damping coefficients due to squeeze-film damping. (a) The shift in the added mass coefficient Δa
quantifies the co-moving fluid mass relative to the cantilever mass and is a measure for the inertial loading; the shift in the absolute fluid mass Δm
is provided on the right axis. (b) The shift in damping coefficient Δc equals the dissipation per unit length acting on the cantilever; the shift in dissipation normalized to the fluid viscosity η is provided on the right axis. The shifts Δa
and Δc caused exclusively by squeeze-film damping were calculated by subtracting the values recorded in the unbounded fluid, a
, provided in the figure legend. The means ± SD (N = 3) are shown.