Instability of two-phase flow in vertical cylinders
1975; AIP Publishing; Volume: 18; Issue: 5 Linguagem: Inglês
10.1063/1.861183
ISSN2163-4998
AutoresM. N. Esmail, R. L. Hummel, J. W. Smith,
Tópico(s)Fluid Dynamics and Heat Transfer
ResumoThe stability of two-phase flow in a vertical cylinder is considered. The liquid phase is assumed to flow past the cylinder surface in a thin layer, assuming no mixing with the core gas flow. The complete system of Navier–Stokes and continuity equations for both phases is treated analytically, using a perturbation procedure based on expansion in powers of small wavenumbers. The results of the first approximation determine the phase velocity of waves developed on the liquid-gas interface. The second approximation reveals the complete pattern of hydrodynamical stability of two-phase flow over the entire range of gas-flow velocities. The topological features of stability curves are depicted. The effects of surface tension, cylinder radius, and interface curvature on the two-phase flow stability are revealed.
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