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Migration of Liquid Bridges at the Interface of Spheres and Plates with an Imposed Thermal Gradient.

In this paper, we experimentally investigate the migration of liquid bridges at the interface of spheres and plates with an imposed thermal gradient. Key influencing factors of interface gap, sphere material and diameter, liquid viscosity, and thermal gradient on the migration behaviors are highlighted. Furthermore, physical mechanism of this intriguing interfacial phenomenon is numerically unraveled. The originality of this work lies in the fact that when encountered with thermal gradients, liquid bridges could migrate at the interface of spheres and plates, and a general design philosophy of related parameters for enhancing or weakening this thermal flow is proposed.