摘要
对表面水波在 H-S槽中的传播进行了实验研究和理论分析 ,通过对水波的复波数的测量验证 Darcy定理在非定常 H-S流中的适用性。研究表明 ,水面波在 H-S槽中的传播 ,具有较强的衰减现象。同时 ,其复波数的实部与Darcy理论预测吻合 ,而其虚部与理论预测相差甚远。表明在非定常情况下 ,Darcy定理有局限性 。
The basic physics of unsteady Hele-Shaw flow at high Reynolds numbers is mainly studied by an experimental measurement. In order to confirm the Darcy′s law in Hele-Shaw cell, since there is an analogy between flow in cells and that in porous media, progressive water waves are utilized to build an unsteady flow in a Hele-Shaw cell, and which complex wave number is measured by a wave height gauge. Meanwhile, theoretical analyses are used to compare with experimental data. Result shows Darcy′s Law is not exactly correct for unsteady Hele-Shaw flows, and it is expected to conduct a modified Darcy′s Law.
