Numerical Simulation of Forced Breakup of a Liquid Jet
Even nowadays, the physics of jet breakup is still not well understood and this is the reason why a lot of effort has been put recently into the investigation of this kind of flow. Within this framework, special attention has been focused on the use of excitation sources of defined amplitude and frequency in order to understand their effect on the (possible) jet disintegration process [SCO99, CGO+00]. The lack of analytical models for describing the strong non-linear behavior of this type of flow on the one hand, and the difficulty of accessing experimentally flow features like pressure and/or velocities on the other hand, have made it necessary to develop and use numerical methods for this purpose. In the recent past, numerical methods based on the Navier-Stokes equations with the possibility of handling free-surfaces have been developed and proved to fulfill the above requirements; they also have shown to be able to reproduce qualitatively well the jet-breakup behavior observed in the experiments [AMP00]. In the work presented here, after a brief description of the numerical method used, the results of simulations of the forced breakup of a round jet of ethanol into quiescent air will be presented. Three different types of excitation have been used and their effects on the jet breakup have been analyzed. Special attention has been paid to the capture of droplet generation.
Unable to display preview. Download preview PDF.
- [AMPOO]F.-O. Albina, S. Muzaferija, and M. Perić. Numerical simulation of jet instabilities. In Proceedings of the 16th Annual Conference on Liquid Atomization and Spray Systems, Darmstadt, Germany, September, 11–13 2000.Google Scholar
- [CGO+00]H. Chaves, H. Glate, F. Obermeier, T. Seidel, V. Weise, and G. Wozniak. Disintegration of sinusoidally forced liquid jet. In ILASS-Europe 2000, Darmstadt, Germany, September 11–13 2000.Google Scholar
- [CGPS72]L.S. Caretto, A.D. Gosman, S.V. Patankar, and D.B. Spalding. Two calculation procedures for steady, three-dimensional flows with recirculation. In Proc. Third Int. Conf. Numer. Meth. Fluid Dyn., Paris, 1972.Google Scholar
- [FP01]Joel Ferziger and Milovan Peric. Computational Methods for Fluid Dynamics. Springer Verlag, 3rd edition, 2001.Google Scholar
- [Gou98]P. M. Gould. Analysis of plates and shells. Prentice Hall, 1998.Google Scholar
- [GVL96]G.H. Golub and CF. Van Loan. Matrix Computations. The John Hopkins University Press, third edition, 1996.Google Scholar
- [MPSS98]S. Muzaferija, M. Peric, P.C. Sames, and T.E. Schellin. A two-fluid Navier-Stokes solver to simulate water entry. In Proceedings of the 22nd Symposium on Naval Hydrodynamics, Washington, D.C., August 9-14 1998.Google Scholar
- [SCO99]T. Seidel, H. Chaves, and F. Obermeier. Grundlagenuntersuchungen an einer Einstoffdüse bei hochfrequenter Strahlanregung und stroboskopischer Betrachtung. In Spray’ 99, University of Bremen, Bremen, Germany, October 5-6 1999.Google Scholar
- [Ubb97]O. Ubbink. Numerical prediction of two fluid systems with sharp interfaces. PhD thesis, University of London, 1997.Google Scholar