Analysis of Flow Resistance Characteristics in Shellfish Catchers Based on Porous Media Model and Surrogate Model

摘要: Stochastic variations in operational conditions and complex filter screen models are the main factors limiting accurate prediction of flow resistance characteristics in shellfish catchers. To address this issue, this paper conducts a comprehensive numerical study, focusing on the porous filter screen modeling method and surrogate-based rapid prediction of flow resistance for shellfish catchers. First, a mathematical model is established, and a dimensionality-reduced computational fluid dynamic modeling approach is proposed. Two modeling methods are employed to simulate the shellfish catcher, validating the accuracy of the dimensionality-reduced model. Second, to enable rapid prediction of flow resistance characteristics, multiple surrogate models are trained on simulation data to construct mapping relationships among blockage ratio, flow rate, and flow resistance. The results demonstrate that the porous filter screen model can effectively replace the original model while significantly reducing computational costs. Furthermore, the surrogate models accurately predict the flow resistance characteristics of shellfish catchers, providing valuable references for solving related engineering problems.