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通过相似物理模拟方法研究离心力场下液态金属在微尺度空间内的流动过程,相似准则的推导是工作的重点。在传统流动方程的基础上,充分考虑微精密铸造过程中特殊的物理条件,推导了离心铸造过程液态金属在微尺度空间内充型流动时满足的流动方程和伯努利方程,为微尺度空间内液态金属的充型流动过程数值模拟提供了数学模型。同时,依据微流动方程和相似理论,获得了离心力场下物理模拟微尺度空间内液态金属流动过程的相似准则,从而实现微流动过程的可视化观察和定量分析。
The similar physical simulation method is used to study the flow of liquid metal in microscale space under the centrifugal force field. The deduction of similarity criterion is the focus of work. On the basis of the traditional flow equation, the flow equation and Bernoulli equation satisfied by liquid metal in the microcomponent space during centrifugal casting process are derived by fully considering the special physical conditions during the micro-precision casting. The mathematical modeling of the numerical simulation of the charge-flow process of liquid metal is provided. At the same time, according to the theory of microfluidic equation and similarity theory, the similarity criterion of liquid metal flow in the physical simulation microscale space under centrifugal force field is obtained, so that the visual observation and quantitative analysis of the microfluidic process can be realized.