Mist harvesting with vertical fibers

Abstract eng:
In some arid regions an important source of water is fog. The method used to collect water from mist consists in erecting a large net on which the droplets carried in the mist can impact. The two main issues involved in this process are the impact of the drop on the fibers and the drainage of the fluid from the fibers to the tank below the net. In this work we consider a system with only vertical parallel fibers and aim at optimizing its design to maximize the drainage. We experimentally study this fluid-structure interaction problem with a wind mist tunnel and characterize the collecting efficiency of the fibers array. We develop theoretical models considering the interaction of wind, drops, wetting of the fibers and deformations of the fibers in order to identify and characterize the physical mechanisms at play.

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