An Optimised Surface Structure for Passive, Unidirectional Fluid Transport Bioinspired by True Bugs

Abstract Some true bug species use droplet-shaped, open-capillary structures for passive, unidirectional fluid transport on their body surface in order to spread a defensive protect themselves against enemies. In this paper we investigated if the shape of found bugs (bug-structure) could be optimised with regard better performance transportation. Furthermore, kind structure technical applications where interaction occurs, it is necessary adapt geometry contact angle between and surface. Based principal operation droplet-shaped structures, targeted flow increase flexibility design geometry. To spacing angle, implemented an equilibrium simulation the, surrounding, fluid. verify functionality structure, designed manufactured prototype. By testing prototype pure water used as fluid, proved. This may surfaces needed, e.g. evacuation condensate prevent from mold growth, microfluidics, lab-on-a-chip microneedles efficient drug/vaccine coating.