若流动系统中各物理量的大小不仅随位置变化、而且随时间变化，则称为不稳定流动。例如水在渗流场内运动过程中各个运动要素随时间改变的水流运动。
奥新非稳定流 oseen unsteady flow
不稳定流非稳定流 unsteady flow
非稳定流动 nonsteady flow ; unsteady flow
非稳定流动期 transient period
地下水非稳定流 groundwater unsteady flow ; unsteady groundwater flow
非稳定流抽水试验 unsteady flow pumping test
非稳定渗流 Unsteady Seepage Flow ; unstable seepage flow
非定常流不稳定流 unsteady flow
非饱和非稳定渗流 unsaturated unsteady seepage
本文用线性系统方法研究了变流量非稳定流抽水试验资料。
In this paper, a study on the variable discharge unsteady flow pumping test data is made using a linear system method.
本文推导了二维非稳定流渗流场不同等级网格有限差分理论方法。
This paper gives the deduction of a theoretical method of the finite difference by different grades of grids, which is suitable for the seepage field of two-dimensional unsteady flow.
本文在非稳定流基础上推导出降水引起基坑周边土体的沉降计算公式。
In this paper, based on the unsteady flow around foundation derived precipitation caused soil settlement formula.
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