This paper presents a DSD/SST study of the hydrodynamic effects of mucus on swimming performance of an undulatory foil in a non-Newtonian uniform flow. As the non-Newtonian effects are dominant in the boundary layer, this model can be taken as a simple strategy to study the hydrodynamic effects of fish mucus. Based on the simulations by varying the power-law fluid behavior index, some propulsive properties including the drag coefficients, the power coefficients, and the flow fields are analyzed in detail. It is found that in addition to other biological functions, the fish mucus serves to reduce the friction, enhance the thrust, save hydrodynamic power, reduce the force oscillations, and reduce the swimming sound. This work provides a better understanding of the fish mucus effects from the point of view of hydrodynamics.

中文翻译：

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使用 DSD/SST 方法研究粘液对波浪形水翼游泳性能的水动力影响

本文提出了一项 DSD/SST 研究，研究粘液对非牛顿均匀流动中波动箔的游泳性能的流体动力学影响。由于非牛顿效应在边界层中占主导地位，因此该模型可以作为研究鱼类粘液水动力效应的简单策略。在通过改变幂律流体行为指标进行模拟的基础上，详细分析了一些推进特性，包括阻力系数、功率系数和流场。研究发现，鱼粘液除了具有其他生物学功能外，还起到减少摩擦、增强推力、节省水动力、减少力振荡和降低游泳声音的作用。这项工作从流体动力学的角度提供了对鱼粘液效应的更好理解。