The Investigation of the Hydrodynamics of an Artificial Reef - Aquaculture and the Environment: A Shared Destiny - page 94

5.1 Two parallel hollow cube artificial reefs
Fig. 17 presents the numerical results for the upwelling field of single and two parallel
artificial reefs with different spacings. Compared to a single artificial reef, the heights of the
upwelling field increase with spacing at first and then decrease until steady. When the
spacing is 0.5 h , the height of the upwelling field reaches the maximum value of 13.8 cm, and
the corresponding area is 49.0 cm 2 . When the spacing is equal to or larger than 2.0 h , the
height of upwelling field has a steady value of 12.5 cm, and the steady value of the area is
35.0 cm 2 .
Fig. 17. Distribution of the upwelling field of a single and two parallel hollow cube artificial
reefs with different spacings by simulation (the inlet velocity is 11.0 cm/s)
Fig. 18 shows a long and narrow slow flow field spread at the rear of a single artificial reef.
Along the forward direction of the x-axis, the maximum horizontal flow velocity appears
within the artificial reef, and after that, the flow velocity first decreases and then increases.