Study on the Flow Field and the Shielding Effect of a Hemisphere Artificial Reef and Other Alike Sub-Sea Structures

A hemisphere artificial reef is designed and numerically simulated in this paper. Investigations of this structure subject to various flow fields with different hole ratios and different diameter are carried out. Besides, the effect of the hemisphere structure to the surrounding flow field is discussed. Further studies are carried out for an array of hemisphere structures of this kind. Comparing to the traditional artificial structures like the trapezoidal reefs and square reefs, the hemisphere reef can not only produce a qualified ascending flow field, but his internal shadowing effect is not negligible.This area then can provide a better ocean ecological environment and living environment to attach and promote the marine life.