Numerical Calculation Of Single-shell Particle Trajectories In Microfluidic Chip

Microfluidic chiptechnology is produced as the development of themultiple crossover and coordinated subjects. As the shown up of the moreapplication and more new designs in the Microfludic chip, it is essential to have adeep research on the Microfludics. There are a large amount of research resultswhich are based on the hydrodynamics for the Microfludics analysis in the history. Inaddition, its application is widely used in the bio-medical and chemistry industry atthe same time. However, contrasting to the theory analysis and the experimentresearch, it should be a significant function for the simulation of the Microfludics.In this thesis, multiple layer microparticles in the micro-channel through a90degree bend have been investigatedin aMicrofludic chip. The aims on the trajectoryof the microparticleshave been deeply carried out by using both the theory analysisand the numerical simulation methods. The results are helpful to the design ofmicrofluidic chip and the exeriment. The main research assignments are as follows:(1) Owing to the sample particle used in the experiment. The theoreticalanalysis of a single-shell model is created.(2)According to thetheoretical analysis of the double electrical layer, theelectroosmotic flow is carried out.(3) Based on the hydrodynamic and the double electrical layer theory, theequations of the flow fluid and the electric field are carried out respectively.(4)According to the single-shell model theory, formula of CM factor and theEP/DEP and multiple layer particle interaction forces are carried out.The model ofkinds of forcesfor microparticles are created for the following simulation.(5)The User Defined Function (UDF) in Fluent is used to build the special Cprogram to study the principles of the trajectory of the particles.(6) From the results of the simulation. It is given for the explanation of theprinciples of the particle trajectory. At the same time, a statical method is used to derive the deposition of the microparticels and the explanation of the phenomenonisgiven in the end of the thesis.