PL EN


Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
Tytuł artykułu

Relaxation and breakup of a cylindrical liquid column

Autorzy
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Instability of a capillary wave and breakup of a square cylindrical liquid column during its relaxation have been investigated numerically by simulating three-dimensional Navier-Stokes equations. For this investigation a computer code based on the volume-of-fluid (VOF) method has been developed and validated with published experimental results. The result shows that the agreement of numerical simulation is quite good with the experimental data. The code is then used to study the capillary wave and breakup phenomena of the liquid column. The investigation shows the underlying physics during relaxation of the square cylindrical liquid column, illustrates the formation and propagation of the capillary wave and breakup processes. The breakup behavior for the present configuration of the liquid column shows some significant differences from those predicted by conventional jet atomization theories. The formation of the capillary wave is initiated by the surface tension on the sharp edge of the square end of the cylinder and the propagation of the wave occurs due to the effect of surface tension force on the motion of the fluid. The propagation of the capillary wave to the end of the liquid column causes a disturbance in the system and makes the waves unstable which initiates the breakup of the liquid column. The characteristics of the capillary wave show that the amplitude of the swell grows faster than the neck of the wave and that of the tip wave grows much faster than other waves. The velocity of the liquid particle is dominated by the pressure in the liquid column.
Rocznik
Strony
257--270
Opis fizyczny
Bibliogr. 14 poz., rys., wykr.
Twórcy
autor
autor
  • Department of Mechanical Engineering Bangladesh University of Engineering and Technology Dhaka-1000, BANGLADESH, mali@me.buet.ac.bd
Bibliografia
  • Ashgriz N. and Poo J.Y. (1991): FLAIR: Flux line-segment model for advection and interface reconstruction. - J. Computational Physics, vol.93, pp.449-468.
  • Brackbill J.U., Kothe D.B. and Zemach C. (1991): A continuum method for modeling surface tension. - J. Computational Physics, vol.100, pp.335-354.
  • Donnelly R.J. and Glaberson W. (1966): Experiments on the capillary instability of a liquid jet. - Proceedings of the Royal Society of London, Series A, vol.290, pp.547-556.
  • Goedde E.F. and Yuen M.C. (1970): Experiments on liquid jet instability. - J. Fluid Mech., vol.40, part 3, pp.495-511.
  • Gueyffier D., Li J., Nadim A., Scardovelli R. and Zaleski S. (1999): Volume of fluid interface tracking with smoothed surface stress methods for three-dimensional flows. - J. Computational Physics, vol.152, pp.423-456.
  • Hirt C.W. and Nichols B.D. (1981): Volume of fluid (VOF) method for the dynamics of free boundaries. J. Computational Physics, vol.39, pp.201-225.
  • Rayleigh L. (1879): On the capillary phenomena of jets. - Proceedings of the Royal Society of London, vol.29, pp.71-97.
  • Rider J.W. and Kothe (1998): Reconstructing volume tracking. - J. Computational Physics, vol.141, pp.112-152.
  • Shinjo J., Ogawa S. and Umemura A. (2007): Numerical simulation of circular liquid jet disintegration due to capillary force. - Proceedings of the Sixth Asia-Pacific Conference on Combustion, Nagoya, Japan, 20-23 May 2007, pp.623-626.
  • Stone H.A., Bently B.J. and Leal L.G. (1986): An experimental study of transient effects in the breakup of viscous drop. - J. Fluid Mech, vol.173, pp.131-158.
  • Stone H.A. and Leal L.G.. (1989): Relaxation and breakup of an initially extended drop in an otherwise quiescent fluid. - J. Fluid Mech, vol.198, pp.399-427.
  • Umemura A. (2004): Micro-gravity Study on instability of near critical mixing surface jet (mechanisms of Rayleigh-Taylor instability excitation at nozzle exit and short spacing disintegration. - J. Combustion Society of Japan, vol.46, No.135, pp.50-59 (in Japanese).
  • Umemura A. and Wakashima Y. (2002): Atomization regimes of a round liquid jet with near-critical mixing surface at high pressure. - Proceedings of the Combustion Institute, vol.29, pp.633-640.
  • Welch S.W.J. and Wilson J. (2000): A volume of fluid based method for fluid flows with phase change. J. Computational Physics, vol.160, pp.662-682.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPZ5-0015-0038
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.