What is the Coanda effect associated with in DP systems?

The Coanda effect refers to the tendency of a fluid jet to stay attached to a surface, and it plays a significant role in the dynamics of fluid movement around thrusters in dynamic positioning (DP) systems. Although it is related to various phenomena in fluid dynamics, in the context of DP systems, it is particularly relevant when considering the impact of propeller wash on the performance and efficiency of the system.

When analyzing DP systems, the Coanda effect can lead to a decrease in net thrust due to the interaction of the propeller wash with the vessel's hull or other structures nearby. As the propeller discharges water, the flow can become attached to the hull, affecting how efficiently the thrust produced by the propeller translates into forward motion for the vessel. This interaction means that not all of the thrust generated is effectively contributing to the desired position-keeping, as some of it can be lost due to this attachment.

Thus, the correct answer highlights the Coanda effect's influence on thrust loss in the context of DP systems, reflecting its role in the complex hydrodynamics involved. Understanding this relationship is crucial for DP operators to optimize thrust and ensure effective positioning of the vessel, particularly in challenging conditions.

While other factors such as thrust efficiency, vessel