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为研究回流区污染物堆积的机理及规律,采用高阶三点紧致差分格式对涡量-流函数方程和污染物对流扩散方程进行高精度数值求解,得到了污染物堆积与回流区岸线角度、排放点位置之间的定量关系.该方法有效抑制了通常的数值方法中对流项差分离散造成数值不稳定的现象,且程序编制简洁,运行效率高。数值计算表明该法有效、可靠.研究结果对沿岸排污点布置、减少海域污染具有一定的现实指导意义,并具有重要的理论价值.
In order to study the mechanism and rule of pollutant accumulation in the recirculation zone, a high-order three-point finite difference scheme was used to solve the eddy-current flow equation and the convection-diffusion equation of pollutant. Angle and discharge point.The method can effectively restrain the numerical discrepancy of convection term from being unstable in the numerical method, and the programming is concise and the operation efficiency is high. The numerical calculation shows that the method is effective and reliable.The research results have certain practical significance for the arrangement of pollutant discharge along the coast and the reduction of pollution in the sea area, and have important theoretical value.