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Experimental investigation of viscous drop formation from a needle

The present paper focuses on the shape evolution and deformation of single drops and pairs of trailing drops made from dilute suspensions during gravitational sedimentation in an otherwise quiescent homogeneous liquid. The presented experimental results are only one part of a comprehensive investigation also including theoretical considerations and numerical simulations. This paper presents the characteristic phenomena through both flow visualization and detailed PIV‐measurements including subsequent derivation of the streamline pattern.