Cavitation Process Simulation for Automotive Applications with an Isothermal Solver Approach 2013-01-1608
This paper contains a brief description of the numerical
approach used to simulate the flow of cavitating liquids that was
implemented in FloEFD™ software. Some computational results
obtained using this approach are presented. The calculations used
3D Navier-Stokes equations coupled with the k-e turbulence model
and equilibrium cavitation model.
It is assumed that this process occurs at a fixed temperature
(so-called isothermal cavitation). The validity of this assumption
is confirmed by numerous test data. Since the liquids heat capacity
is large enough to neglect the heat generated in the phase
transition, it practically doesn't change the liquids
temperature. This approach allows a minimized number of required
thermodynamic properties of the liquid. A new cavitation
calculation method of a 2-phase-2-solver (Hybrid density- and
pressure-based splitting scheme) calculation is introduced that
applies appropriate Computational Fluid Dynamics (CFD) solvers to
the low and high compressible region and therefore creating a
hybrid solver splitting scheme.
Application examples for different industrial liquids are shown
with flow in injectors, pumps and around hydro foils and present
the validation of the model compared to theory and experiment. The
comparison of the calculation results against test data shows a
satisfying agreement of the model.