“School of Physic”

Back to Papers Home
Back to Papers of School of Physic

Paper   IPM / Physic / 8516
School of Physics
  Title:   Resonant Instability of Tangential Discontinuity in A Compressible Fluid
1.  L. Rajaee
2.  B. Shokri
  Status:   Published
  Journal: J. Phys. D: Appl. Phys.
  Vol.:  40
  Year:  2007
  Pages:   3512-3517
  Supported by:  IPM
The excitation and stability of surface waves on the interface of two compressible fluids moving with respect to each other in a two-dimensional channel is investigated. It is shown that in this case surface waves are always unstable. On the other hand, in this case the dispersion relation in the short and the long wavelength limits coincides with the dispersion relation in the compressible and the incompressible infinite fluid, respectively. Furthermore, surface wave excitation under resonant condition is investigated. It is concluded that due to the Cerenkov-like emission mechanism a sound wave propagates in the fluid at rest. In this case, the growth rate of the Cerenkov-like instability is compared with the growth rate of the instability for the excitation of the tangentially discontinuous surface wave. Likewise, using fluent software, surface wave excitation in two dimensions is simulated.

Download TeX format
back to top
scroll left or right