Numerical Simulation of Hydrodynamic Mixing in Narrow Rectangular Multi-Channel
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摘要: 采用CFD程序CFX对窄间隙矩形多通道内流体的交混特性进行了数值模拟。数值计算结果表明:流体经过全部的交混段后,两边侧边通道内的流量低,中间4个主通道内的流量高。入口流量大小不同的条件下,流体经过全部的交混段后,主通道内的流量都趋于一致。前4段的流动交混较为明显,随着轴向交混段的增加,交混量越来越小;流体交混时,主通道入口流量大的通道内的流体向入口流量小的通道内运动,初始阶段在侧边通道和交混段产生了较强的二次流,但随着轴向交混段的增加,二次流变得越来越小。Abstract: With the help of the Computational Fluid Dynamics code,hydrodynamic mixing in the narrow rectangular multichannel is numerical simulated.The results show that the water flow rate in two side channels is lower than that in the mean main channel after passing through the whole axial mixing sections.Under the different ratios of the water flow rate at the inlet,the water flow rate in the mean main channels is consistent after passing through the whole axial mixing sections.Hydrodynamic mixing in former 4 mixing sections is obvious,and hydrodynamic mixing decreases with the increasing of the number of the axial mixing section.During the process of the mixing,the part of water in the mean main channel of the high flow rate at the inlet enters into the channel of the lower flow rate,and the secondary flow forms in the mixing section,but the secondary flow decreases with the increasing of the number of the axial mixing section.
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Key words:
- Narrow channel /
- Multi-channel /
- Hydrodynamic mixing /
- Numerical simulation
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