Numerical simulation and experiment study on the resistance loss of glue pipeline transportation

The electronic packaging technology and the relevant equipments are rapidly developing with the development of microelectronics technology. As an important part, pipeline transportation will influence the running and efficiency of the electronic packaging system directly, thus making it necessary to study pipe flow resistance which is theoretically important for system design and process optimization. Comparing to traditional slurry, the flow characteristics of glue are more complex due to its viscous structure. Although pipeline transportation technology has been adopted in some industries, the lack of a clear understanding of pipeline flow movement has largely restricted the development of this technology. In order to understand the flow characteristics of high viscosity glue which is widely applied to the electronic packaging, a mathematical model of glue pipeline transportation is established by combining the fluid dynamics theory and the characteristics of the glue under the assumption including fluid particle, uniformity and continuity in the case of no segregation. According to the result of a certain industrial test, numerical simulation on the resistance of glue pipeline transportation under three different condition (mass flow velocity, fluid viscosity and pipe diameter) is analyzed by the Fluent software. At the same time, the results of numerical simulation are verified through industrial experiment, the pipeline transportation simulation of glue is feasible. Numerical results are presented and compared against experimental findings, illustrating the behavior of the different governing parameters. The relationship between the glue mass flow velocity and loss of resistance along the way is obtained. Moreover, how to determine optimal pipe diameter and how to choose viscosity of glue are also studied and practical method is presented for each. The result will offer useful reference for people to confirm the running mode and parameters of pumping in the engineering design. It will also offer correct parameters for selecting piping. Having these parameters, it can perfect the design of pumping and piping in industry.