Hydrodynamic characteristics of a partitioned recirculating aquaculture pond

Research Hypotheses We hypothesize that modular functional zoning with physical baffle guidance can create a spatially heterogeneous flow field in partitioned recirculating aquaculture ponds (PRAP). This design will achieve efficient water circulation, match biological requirements across zones, and enable passive directional transport and graded collection of aquaculture particles, synergistically improving hydrodynamic efficiency and ecological purification. Specifically: (1) Physical baffles eliminate stagnant dead zones by forming closed recirculation zones, and flow uniformity jumps sharply when inlet velocity exceeds the system structural resistance threshold; (2) Zoned design independently regulates hydrodynamic parameters to meet the distinct needs of fish culture, aeration, and water purification; (3) Particle escape rates are negatively correlated with diameter and density, with large/dense particles depositing in low-velocity vortex cores for energy-free solid-liquid separation. Data Content A horizontal flow model was established for a 300m×100m PRAP using the SST k-ω turbulence model and Discrete Phase Model (DPM, for dilute particle flow