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NUMERICAL MODELING FOR MULTIPHASE INCOMPRESSIBLE FLOW WITH PHASE CHANGE
 

Summary: NUMERICAL MODELING FOR MULTIPHASE
INCOMPRESSIBLE FLOW WITH PHASE CHANGE
Xiao-Yong Luo, Ming-Jiu Ni, Alice Ying, and M. A. Abdou
Mechanical & Aerospace Engineering Department, University of California,
Los Angeles, Los Angeles, California, USA
A general formula for the second-order projection method combined with the level set
method is developed to simulate unsteady, incompressible multifluid flow with phase change.
A subcell conception is introduced in a modified mass transfer model to accurately calculate
the mass transfer across the interface. The third-order essentially nonoscillatory (ENO)
scheme and second-order semi-implicit Crank-Nicholson scheme is employed to update
the convective and diffusion terms, respectively. The projection method has second-order
temporal accuracy for variable-density unsteady incompressible flows as well. The level
set approach is employed to implicitly capture the interface for multiphase flows. A con-
tinuum surface force (CSF) tension model is used in the present cases. Phase change
and dynamics associated with single bubble and multibubbles in two and three dimensions
during nucleate boiling are studied numerically via the present modeling. The numerical
results show that this method can handle complex deformation of the interface and account
for the effect of liquid­vapor phase change.
1. INTRODUCTION
The heat transfer and incompressible flow processes associated with phase-

  

Source: Abdou, Mohamed - Fusion Science and Technology Center, University of California at Los Angeles

 

Collections: Plasma Physics and Fusion