THE TWO-FLUID MODEL OF TURBULENT BUOYANT RECI RCULATING OIL-WATER TWO-PHASE FLOW
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摘要: 在自然界和工程技术的许多领域,常遇到这样一类物理性质相差悬殊的两相复杂湍流,其特点是流场中包含有回流和因两相间的密度差而产生的浮力,在一定条件下,流场的密度分布会发生突变,使数学模拟和数值计算的难度大大增加。本文把研究精细的油污染预报模型作为基本目标,广泛地涉及了两相湍流精细模拟的理论和方法。用Eulerian坐标系中多流体模型统一描述油和水两相各自的运动,并分别对油和水本身的湍流输运规律以及相间相互作用规律进行模拟,建立了油-水两相湍浮力回流双流体模型及相应的数值计算方法。选定了包含有浮力和回流的两相复杂湍流作为模拟对象,对模型进行了数值验证,并与实测资料作了对比。然后,对油-水两相湍流进行了预报。结果表明,模型的模拟效果非常满意。Abstract: 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...
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Key words:
- two-phase turbulence /
- two-fluid model /
- prediction of oil pollution
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