Abstract
Trajectories of single silicon drops in linear shear flows of glycerol-water solutions were measured to evaluate the transverse lift forces acting on the drops. Experiments were conducted under the conditions of logM = -6.3 and -4.8, 0 < ReD ≤ 23 and 3.2 ≤ ω ≤ 6.0 s-1, where M is the Morton number, ReD the drop Reynolds number, and ω the magnitude of the velocity gradient of the linear shear flow. The lift coefficient CL was calculated from the measured drop trajectory. As a result, the following conclusions were obtained: (1) CL of spherical drops steeply decreases to zero with increasing ReD, (2) CL of deformed drops decreases from positive to negative values with increasing ReD, and (3) when the shear rate is large and CL is positive, CL takes a larger value for smaller M.
