关键词: 油气混输, RNG, 气泡流, 湍流

Abstract:

RNG K-ε model from crude and gas mixed-transfer bubbly turbulence is a series of partial differential equation group,which is calculated difficultly. And at present，accuracy analytic solution is not existed. According to partial differential equation group's trait，a calculated method of numeric solution was advanced.For simplifying model, currency differential equation form is first built and discrete process, because pressure grads term had difficulty in discrete momentum equation，an interlaced grid technology was adopted only to discrete momentum equalion. Finally, Numeric calculation was done to all discrete equations by simple method. This new calculated method，conducted in the paper, is easy to be programmed calculation and used in crude and gas mixed-transfer flow numeric analysis，such as layered flow, annular flow and slug flow，etc.

Key words: crude and gas mixed-transfer, RNG, bubble flow, turbulent flow