Journal article
Relaxation dynamics of a free elongated liquid ligament
Physics of fluids (1994), Vol.19(9), pp.092101-092101-11
09/01/2007
DOI: 10.1063/1.2776363
Abstract
The time-dependent relaxation dynamics of a moderately elongated liquid ligament in air have been numerically studied. The Navier-Stokes equations are solved using a finite-volume formulation with a two-step projection method on a fixed grid. The free surface of the liquid ligament is tracked by a coupled level set and volume-of-fluid method with the surface tension force determined by the continuum surface force model. The relaxation process of the elongated liquid ligament has been simulated and the end-pinching mechanism of the breakup process has been thoroughly examined. It has been found that the formation of a neck is not necessarily a precursor for breakup as inaccurately theorized in the end-pinching mechanism in the literature. The neck may reopen after undergoing an initial development towards pinch-off. In such an instance, droplet pinch-off will not occur. The determining factor for the reopening of a pinching neck has been identified. The experimentally observed restabilization phenomenon, in which further increase of the elongation ratio beyond the critical value would lead to cessation of pinch-off breakup, has also been investigated. Finally, the effects of several parameters on the relaxation mechanism have been examined. The initial end shape and length of the ligament and the Ohnesorge number have been found to play a vital role in the overall relaxation process.
Details
- Title: Subtitle
- Relaxation dynamics of a free elongated liquid ligament
- Creators
- Albert Y. Tong - The University of Texas at ArlingtonZhaoyuan Wang - The University of Texas at Arlington
- Resource Type
- Journal article
- Publication Details
- Physics of fluids (1994), Vol.19(9), pp.092101-092101-11
- DOI
- 10.1063/1.2776363
- ISSN
- 1070-6631
- eISSN
- 1089-7666
- Number of pages
- 11
- Language
- English
- Date published
- 09/01/2007
- Academic Unit
- IIHR--Hydroscience and Engineering
- Record Identifier
- 9984747921602771
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