Multiphase Science and Technology A Quarterly

ISSN for PRINT: 0276-1459

For Online Access

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2007, Volume19

Issue 2

118 pages

DOI: 10.1615/MultScienTechn.v19.i2

Issue price - $193.00

Kosuke Hayashi
Graduate School of Science and Technology, Kobe University, Kobe, Japan

Akio Tomiyama
Graduate School of Science and Technology, Department of Mechanical Engineering, Faculty of Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan

The interface tracking method based on a nonuniform subcell scheme (NSS) and a level set function (LS) is applied to three-dimensional (3-D) general curvilinear and cylindrical coordinate systems. The method for 3-D general curvilinear coordinates is based on the combination of NSS, LS, a finite volume method, and a multiblock method. The method for cylindrical coordinates is based on the combination of NSS, LS, the variable transformation proposed by Verzicco and Orlandi (1996), and a simple method for evaluating surface tension force at the singular point r = 0. Simulations of single air and vapor bubbles in rod bundle geometry are carried out using the former method. Predicted bubble shapes and terminal velocities agree well with measured data and an available terminal velocity model. Bubbles and drops in pipes are simulated using the latter method. Terminal velocities of single drops confined in a pipe are well predicted. The bouncing motion of an air bubble in a laminar water flow in a vertical pipe is successfully simulated. Volumes of bubbles and drops are well conserved in all simulations.

DOI: 10.1615/MultScienTechn.v19.i2.20 Download article, 121-140 pages

Article price - $45.00

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