The shape of a single Newtonian liquid drop moving freely under gravity in quiescent non-Newtonian liquid (visco-inelastic and visco-elastic) has been studied. Strong effect of fluid elasticity on the shape of Newtonian liquid drop has been observed. Based on experimental observations, a shape regime graph has been suitably modified for elastic fluids. Correlations have also been proposed for the prediction of eccentricity of the Newtonian liquid drop moving through a non-Newtonian visco-elastic liquid.
Motion of a Single Newtonian Liquid Drop Through Quiescent Immiscible Visco-Elastic Liquid: Shape and Eccentricity
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Gupta, R., and Wanchoo, R. K. (January 9, 2009). "Motion of a Single Newtonian Liquid Drop Through Quiescent Immiscible Visco-Elastic Liquid: Shape and Eccentricity." ASME. J. Fluids Eng. February 2009; 131(2): 021301. https://doi.org/10.1115/1.3054284
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