Wierschem A, Linde H, Velarde MG
Instituto Pluridisciplinar, Paseo Juan XXIII, No. 1, E-28040 Madrid, Spain and LS Technische Mechanik und Stromungsmechanik, Universitat Bayreuth, D-95440 Bayreuth, Germany.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 2000 Nov;62(5 Pt A):6522-30. doi: 10.1103/physreve.62.6522.
Traveling periodic internal wave trains are generated in liquid layers during the absorption process of a miscible surface-active substance out of the vapor phase. In our nonstationary experimental runs, internal waves are excited by surface waves, which had been previously generated by a surface-tension-gradient-driven instability. The internal wave trains adjust their wave number by an Eckhaus instability. Close to the instability threshold narrow and extended pulses are observed. Furthermore, the wave trains can alter their traveling direction, i.e., one wave train traveling in one direction yields to another train, in general of different wave number, traveling in the opposite direction.
在可混溶表面活性物质从气相吸收过程中，在液体层中会产生行进的周期性内波列。在我们的非稳态实验运行中，内波由表面波激发，而表面波先前是由表面张力梯度驱动的不稳定性产生的。内波列通过埃克豪斯不稳定性调整其波数。在接近不稳定性阈值时，会观察到窄脉冲和扩展脉冲。此外，波列可以改变其行进方向，即一个沿一个方向行进的波列会让位于通常具有不同波数的沿相反方向行进的另一个波列。
