Accession Number : ADA262791


Title :   An Experimental Study of a Plunging Liquid Jet Induced Air Carryunder and Dispersion - A Numerical Simulation of a Turbulent Two-Phase Jet Using a Multidimensional Two-Fluid Model


Descriptive Note : Quarterly rept. no. 9


Corporate Author : RENSSELAER POLYTECHNIC INST TROY NY CENTER FOR MULTIPHASE RESEARCH


Personal Author(s) : Bonetto, F ; Drew, D A ; Lahey, Jr, R T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a262791.pdf


Report Date : 31 Mar 1993


Pagination or Media Count : 39


Abstract : A good understanding of the air carryunder and bubble dispersion process associated with a plunging liquid jet is vital if one is to be able to quantify such diverse phenomena as sea surface chemistry, the meteorological significance of breaking ocean waves (e.g., mitigation of the greenhouse effect due to the absorption of CO2 by the oceans), the performance of certain type of chemical reactors, and a number of other important maritime-related applications. The absorption of greenhouse gases into the ocean has been hypothesized to be highly dependent upon the air carryunder that occurs due to breaking waves. This process can be approximated with a plunging liquid jet. Moreover, the air entrainment process due to the breaking bow waves of surface ships may cause long (i.e., up to 5 km in length) wakes. Naturally, easily detectable wakes are undesirable for naval warships. In addition, the air carryunder that occurs at most hydraulic structures in rivers is primarily responsible for the large air/water mass transfer that is associated with these structures. Also, air entrainment plays an important role in the slug flow regime. In particular, the liquid film surrounding a Taylor bubble has a flow in the opposite direction from the Taylor bubble. This liquid film can be thought of as a plunging liquid jet that produces a surface depression in the rear part of the Taylor bubble.


Descriptors :   *MATHEMATICAL MODELS , *TURBULENT FLOW , *OCEANOGRAPHIC DATA , *LIQUID JETS , *JET FLOW , OCEAN WAVES , GREENHOUSES , AIR ENTRAINMENT , DISPERSIONS , OCEAN SURFACE , MASS TRANSFER , BUBBLES , AIR WATER INTERACTIONS


Subject Categories : Physical and Dynamic Oceanography
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE