Linear stability of viscoelastic confined liquid jet in the presence of gas velocity oscillations

This work examines the linear instability of a viscoelastic confined liquid jet as acoustic oscillations are taken into consideration, which is expressed oscillatory gas velocity, and this theoretical problem solved using Floquet theory. The unstable regions dominated by capillary instability, Kelvin–Helmholtz (KHI), parametric impact heat mass transfer in different also discussed. In addition, mechanism for azimuthal wavenumbers found. Because its viscoelasticity, more than Newtonian counterpart. influence constant time ratio, Reynolds number, elasticity number dramatic on that KHI. forcing frequency impacts mainly changing corresponding wavenumber region. Furthermore, novel phenomenon has complex effect KHI depending increase extent aerodynamic force induced transfer. For smaller density ratio between liquid, enhances instability. Moreover, Weber can enhance interfacial expands range.