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NUMERICAL ANALYSIS OF MULTIPHASE FLOW BY NUFLEX  

Yu, Tae-Jin (서강대학교 대학원)
Suh, Young-Ho (서강대학교 대학원)
Son, Gi-Hun (서강대학교 기계공학과)
Hur, Nahm-Keon (서강대학교 기계공학과)
Publication Information
Journal of computational fluids engineering / v.12, no.2, 2007 , pp. 21-25 More about this Journal
Abstract
A general purpose program NUFLEX has been extended for two-phase flows with topologically complex interface and cavitation flows with liquid-vapor phase change caused by large pressure drop. In analysis of two-phase flow, the phase interfaces are tracked by employing a LS(Level Set) method. Compared with the VOF(Volume-of-Fluid) method based on a non-smooth volume-fraction function, the LS method can calculate an interfacial curvature more accurately by using a smooth distance function. Also, it is quite straightforward to implement for 3-D irregular meshes compared with the VOF method requiring much more complicated geometric calculations. Also, the cavitation process is computed by including the effects of evaporation and condensation for bubble formation and collapse as well as turbulence in flows. The volume-faction and continuity equations are adapted for cavitation models with phase change. The LS and cavitation formulation are implemented into a general purpose program for 3-D flows and verified through several test problems.
Keywords
Level Set Method; Multiphase Flow; Cavitation Flow; Non-Orthogonal Coordinate System;
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Times Cited By KSCI : 1  (Citation Analysis)
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