PARALLEL ADAPTIVE SIMULATION OF A PLUNGING LIQUID JET

• Published in: Acta mathematica scientia Vol. 30; no. 2; pp. 522 - 538
• Main Authors: Galimov, Azat Yu, Sahni, Onkar, Lahey, Richard T., Shephard, Mark S., Drew, Donald A., Jansen, Kenneth E.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2010; Rensselaer Polytechnic Institute,Troy,NY 12180-3590,USA
• Subjects: 65Y05; 76B10; 76M10; air entrainment; Annular; Computer simulation; Finite element method; Forming; Holes; level set method; Liquids; Mathematical models; parallel adaptive simulation; plunging liquid jet; Pools; two-phase ows; 并行数值模拟; 水平集方法; 液体射流; 瞬态过程; 空气射流; 自适应模拟; 非结构网格; parallel adaptive simulation; 76B10; air entrainment; level set method; two-phase ows; 76M10; 65Y05; plunging liquid jet; two-phase flows
• ISSN: 0252-9602; 1572-9087
• DOI: 10.1016/S0252-9602(10)60060-4

This paper is concerned with three-dimensional numerical simulation of a plunging liquid jet. The transient processes of forming an air cavity around the jet, capturing an initially large air bubble, and the break-up of this large toroidal-shaped bubble into smaller bubbles were analyzed. A stabilized finite element method （FEM） was employed under parallel numerical simulations based on adaptive, unstructured grid and coupled with a level-set method to track the interface between air and liquid. These simulations show that the inertia of the liquid jet initially depresses the pool＇s surface, forming an annular air cavity which surrounds the liquid jet. A toroidal liquid eddy which is subse- quently formed in the liquid pool results in air cavity collapse, and in turn entrains air into the liquid pool from the unstable annular air gap region around the liquid jet.