ABSTRACT This paper presents the application of a weakly compressible smoothed particle hydrodynamics model to study plane jets propagating into a still ambient and into a flow field of regular waves. The present study includes a comparative investigation of the main fluid mechanics characteristics in cases of jet discharged either in still water or transversally to regular wave trains characterized by different periods. Concerning jets in a wave environment, the present study shows the existence of the following three different regions of the jet-wave field starting from the nozzle in the intermediate water: the nearest region to the nozzle where the jet motion dominates the wave motion; the intermediate region, where the horizontal velocity component of wave motion dominates the jet centreline velocity decay; and the nearest region to the free surface where the wave period dominates the jet motion. The present study shows the differences found numerically between each flow region.

中文翻译：

---

波浪环境中射流行为的数值研究

摘要 本文介绍了弱可压缩平滑粒子流体动力学模型在研究平面射流传播到静止环境和规则波流场中的应用。本研究包括在静水中或横向于具有不同周期特征的规则波列排放的射流情况下的主要流体力学特性的比较研究。关于波浪环境中的射流，本研究表明，从中间水中的喷嘴开始，存在以下三个不同的喷射波场区域：距离喷嘴最近的区域，其中喷射运动主导波浪运动；中间区域，波浪运动的水平速度分量在喷射中心线速度衰减中占主导地位；以及离自由表面最近的区域，在该区域中，波浪周期主导着射流运动。本研究显示了每个流动区域之间在数值上发现的差异。