Sediment Erosion Generated by a Coandă-Effect-Based Polymetallic-Nodule Collector

To date, hydraulic collection is the most widely considered technology in polymetallic-nodule mining, since there no direct contact between collectors and ocean floor. construct a collector that results least sediment disturbance, it critical to develop an insightful understanding of interaction bed. this end, we conducted set small-scale experiments which several operational conditions were tested, delivering first quantitative data for erosion resulting from driving over sand This paper presents discusses experimental observations. It found collector’s forward velocity inversely proportional bed-sediment depth, bed exposed flow longer time when drives slower vice versa. In contrast, increased jet leads larger depth. Furthermore, underside nearer bed, layer water flow, Finally, show jets strike under inclined angle, destabilizing upper consequently dragging particles along toward duct behind head. study improves predictability created by Coandă-effect-based collectors, crucial asset optimize design decrease extent associated plumes.