THE TWO-FLUID MODEL OF TURBULENT BUOYANT RECI RCULATING OIL-WATER TWO-PHASE FLOW
油-水两相湍浮力回流双流体模型

In the natural world and many fields of engineering, there often exist one kind of two-phase flow with recirculation and buoyancy in which the physical properties of two phases differ greatly with each other, in certain conditions, the field of one parameter may have a sudden decrease or jump. This give much difficulties to the mathematical simulation and the numerical computation. This paper takes refined forecasting model of oil pollution as basic target, widely deals with the theory and method of refined simulation of turbulent two-phase flow. The two-fluid model of turbulent buoyant recirculating oil-water two-phase flow and corresponding method of numerical computation15] are developed in the paper. The motions of oil and water are described by a unified multi-fluid model6-12] in an Eulerian coordinate system. The laws of turbulent transportations for oil and water, and mutual action between the two phase, are simulated. The complex two-phase turbulence with buoyancy and recirculating flow is selected to examine numerically. Comparison of the results of numerical modelling with experimental data13] is conducted. Then the forecasts for oil-water two-phase turbulence are carried out. It is shown that the results of numerical simulation are satisfactory.