The study here is concerned with a thin solid body passing through a boundary layer or channel flow and interacting with the flow. Relevant new features from modelling, analysis and computation are presented along with comparisons. Three scenarios of such fluid-body interactive evolution in two-dimensional settings are considered in turn, namely a long body translating upstream or downstream, a long body with little or no translation and a short body with or without translation. The main progress and findings concern predictions of the time taken by the body to traverse the flow and impact upon the underlying wall, the delicate behaviour at the onset of impact, the dependence on parameters such as the initial conditions and the mass and shape of the body, and the influence of streamwise translation of the body in the surrounding fluid flow.

这里的研究涉及穿过边界层或通道流并与流相互作用的薄固体。展示了来自建模，分析和计算的相关新功能，并进行了比较。依次考虑了在二维环境中这种流体-体相互作用演化的三种情况，即在上游或下游平移的长体，几乎没有或没有平移的长体和有或没有平移的短体。主要的进展和发现涉及对人体横穿水流和对下层壁的撞击所花费的时间的预测，撞击开始时的精细行为，对诸如初始条件以及物体的质量和形状等参数的依赖性。体，以及体在周围流体流动中沿流向平移的影响。