Flow Field Effect of Cube Reef Monocase of Different Structure

Abstract:

The differences in artificial reef structure is one of the main factors affecting the scale effect of the flow field. We selected six widely-used types of reef monocases, namely Da-zi, Mi-zi, Hui-zi, Frame, Cross, and Solid artificial reefs, to study the influence of reef body structure characteristics on the flow field effect in a uniform layout model and further establishe the scale effect model of structurally different unit reefs. The results showed that, based on the law of flow field effect, the indices of reef structure characteristics were volume ratio, permeability coefficient, and relative cross-sectional area of reef monocase. The volume effect model of upwelling was Vu=0.448Ru–1.679–Cp(29.868Cp–6.921)+ Rsa(56.18Rsa–35.42), and the back eddy volume model was Vb=Ru(1830Ru–128)–Rv(95Rv–105)+ Cp(138Cp–154)–Rsa(418Rsa–180). Finally, based on the volume effect model of the flow field, we propose suggestions for selecting structural parameters of the reef body, which provides reasonable parameter guidance for the structural design of an optimal reef based on the flow field volume.