The Effect of Azimuthal Variation of Section Shape on the Interfacial Instability of a Cylindrical Jet

This paper concentrated on the effect of azimuthal variation of section shape on the instability of a cylindrical jet.A single fluid model under certain assumptions was constructed.The characteristic relation between frequency and wave number is obtained using the normal-mode method.The effect of some parameters on the stability was examined and some phenomena in experiments were explained.