Stability of periodic travelling waves in trickle beds

✍ Scribed by D.C. Dankworth; S. Sundaresan

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 771 KB
• Volume: 47
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(92)85033-8

✦ Synopsis

Intricklebedreactors,agasauda

DUkiDP flOW Dauern is obtained at I liquid flow together through the interstices of a random array of solid packing. A high gas and liquid fluxes. A macroscopic volume averaged model can be used to &the%aticaily represent the hydrodynamics of two-phase flow in packed beds. In one dimension, the onset and characteristics of pulsing flow can be modelled as periodic travelling waves. In this paper, the stability of the onedimensional travelling waves is computed in the context of one-dimensional and two-dimensional perturbations of the full model. The 1-D waves are imposed as solutions of a pseudo spectral discretization of the 2-D equations. FIoquet theory is applied to analyze the linear stability of these time-periodic solutions. The results show marked differences between the stability of fulIy developed waves and the corresponding uniform flow solutions when subjected to the same pertmbations. The analysis also shows that two-dimensional flow pattems are likely to evolve from the early stages of pulse growth, and not from breakup of fully-developed 1 -D waves.