Application of Mixing Flow

• Main Author: 林晏丞
• Other Authors: PAN,WEI
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/22141376747136452587

碩士 === 國立中正大學 === 物理系研究所 === 104 === According to Fluid Mechanics, the rate of steady flow in a pipe is in proportion to the product of its area and pressure, which is derived from continuity and Bernoulli’s principles. Nevertheless, the property of a mixing flow is not well discussed, e.g., two upstream pipes joining into one downstream pipe. In addition, the ratio in the downstream flow mixed from the two upstream flows should be a linearly combination of the two flows, which is not observed in many examples. Thus, a new equation governing the mixing flow is required. We first conducted experiments to correlate the flow rates in the two upstream and downstream pipes. The result shows the mixing flow is not just the superposition of the two upstream flows. The ratio of the two upstream flows in the downstream flow is dominated by the pipe with a smaller area in a high flow rate and is dominated by the pipe with a larger area in low flow rate This system is similar to the traffic system that the fluid, flow rates, and the mixing correspond to the vehicle, speed, and the interchanges, respectively. We compare the results of the mixing flow in the fluid and traffic and find they are compatible.