TY - JOUR
T1 - A Preliminary Calculation of Three-Dimensional Unsteady Underwater Cavitating Flows Near Incompressible Limit
AU - Yang-Yao Niu & Wei-Yuan Hsu
JO - Communications in Computational Physics
VL - 4
SP - 894
EP - 910
PY - 2008
DA - 2008/04
SN - 4
DO - http://doi.org/
UR - https://global-sci.org/intro/article_detail/cicp/7819.html
KW - 
AB - <p style="text-align: justify;">Recently, cavitated flows over underwater submerged bodies have attracted
researchers to simulate large scale cavitation. Comparatively Computational Fluid
Dynamics (CFD) approaches have been used widely and successfully to model developed cavitation. However, it is still a great challenge to accurately predict cavitated
flow phenomena associated with interface capturing, viscous effects, unsteadiness and
three-dimensionality. In this study, we consider the preconditioned three-dimensional
multiphase Navier-Stokes equations comprised of the mixture density, mixture momentum and constituent volume fraction equations. A dual-time implicit formulation
with LU Decomposition is employed to accommodate the inherently unsteady physics.
Also, we adopt the Roe flux splitting method to deal with flux discretization in space.
Moreover, time-derivative preconditioning is used to ensure well-conditioned eigenvalues of the high density ratio two-phase flow system to achieve computational efficiency. Validation cases include an unsteady 3-D cylindrical headform cavitated flow
and an 2-D convergent-divergent nozzle channel cavity-problem.</p>