The Control Of Electroosmotic Flow Under The Electromagnetic Field

Micro-chip electrophoresis technology, the forefront of today's technological development, have been used in clinical testing, new drug screening fields. Not only the biological field, but also other areas including food and commodity inspection, environmental monitoring, forensic science, military science and aerospace science begin to use micro-chip technology.It must be necessary tointroduce the turn to improve the separation efficiency on the chip.so the turn effects is inevitable.And now it is focused on the electric field tocntrol the electroosmotic flow toreduce the turn effect. According to the classical theory of electromagnetic,magnetic and electric field are equivalent,in a certain sense.It can acquire the same physical effect. Compared with the radial electric field, radial magnetic field is more real-time, and with the advantages of efficient regulation.Thus, the paper based on the theoretical calculation, through the finite element method,numerical simulated the changes the electroosmotic flow under the magnetic field. Firstly,the effect of temperature and axial electric field onthe electroosmotic flow were studied,which contributed to determine the accuracy of mathematical equations; Then, the comparison between the effect of the radial electric field and radial magnetic field on the electroosmotic flow on the pipe was numerical simulated, and drew the conclusions that the two could affect of electroosmotic flow; after that, the effect of the magnetic field on the electroosmotic flow was explored to improve the turn effect.Respectively, circular single-turn bend, right-angle single-turn bend, double arc-turn bend, double right-angle bend, were Studied;then we acquired that the range for different types ofcorners, to improve the turn effect,under the magnetic field. Thus the conclusion can supply a new way to improve the turn effect in chip-electrophoresis...