Modelling of a RDC using a combined CFD-population balance approach
Modelling of a RDC using a combined CFD-population balance approach
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DOI：
10.1016/j.ces.2004.02.016
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发表时间：
2004-07
影响因子：
4.7
通讯作者：
A. Vikhansky;M. Kraft
中科院分区：
文献类型：
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作者：
A. Vikhansky;M. Kraft
在本研究中，我们提出当分散相的体积分数不小时，对液-液两相流的欧拉/拉格朗日方法进行扩展。连续相速度是通过求解用 k-ε 湍流模型增强的雷诺平均纳维-斯托克斯方程获得的。分散相的运动是通过求解考虑惯性、阻力和浮力的运动方程来计算的。相之间的耦合由动量源项和解释液滴运动产生湍流的项来描述。通过单粒子蒙特卡罗随机模拟方法处理液滴的碰撞和破碎。该方法基于质量流量公式和算子分裂技术。为了验证数值过程，计算了旋转盘接触器中的液滴尺寸分布和流场，并与现有的实验结果进行了比较。
In the present study we propose an extension of the Euler/Lagrangian approach for liquid–liquid two phase flows when the volume fraction of the dispersed phase is not small. The continuous phase velocity is obtained by solving the Reynolds-averaged Navier–Stokes equations augmented with the k–ε turbulence model. The motion of the dispersed phase is calculated by solving the equations of motion taking into account inertia, drag and buoyancy forces. The coupling between the phases is described by momentum source terms and the terms that account for turbulence generation by the droplets’ motion. Collision and breakage of the droplets are treated by a single particle Monte–Carlo stochastic simulation method. This method is based on a mass flow formulation and operator splitting technique. For validation of the numerical procedure the droplet size distribution and flow fields in a rotating disc contactor are calculated and compared with the existing experimental results.