摘要：Direct numerical simulations (DNS) of air entrainment by breaking bow waves
of naval surface ships are outside of the computational reach of the most
powerful computers in the foreseeable future. This creates a need for models
of air entrainment for applications in numerical simulations for ship design.
We present a model that is based on the local liquid velocity and the
distance to the interface, which determines whether air entrainment should
occur. Using this model and the bubble size distributions measured by Deane
and Stokes1 we simulate the air entrainment in the breaking bow wave
experiments of Wanieski et al.2 Comparison against these experimental data is
good. We then apply this model to simulate the flow around naval combatant
DTMB5415. The model predicts air entrainment in all the regions where it is
actually observed at sea, namely the breaking bow wave, along the water/air/hull
contact line and around the transom stern. To the best of our knowledge this
is the first model of air entrainment that compares favorably with data at
laboratory scale and presents the right trends at full-scale conditions.
