The Electroosmotic Flow And Heat Transfer Of Newtonian Fluids In Microchannel

With the rapid development of microelectronic engineering, universal application of integrated circuits and the quickly updating of various micro-devices, Microfluidic transfer and heat transfer phenomena have become the new field of research of broad application prospects. With the reducing of pipe and the device size, the traditional volume forces such as gravity, inertial force are not important any more, the dominant driving force for microfluidic systems is the surface forces. This creates a new fluid control and drive mechanisms, since it has high efficiency of electric drive and easy to control, the electroosmotic flow (EOF) has become the dominant drive technology, widely used in microfluidic systems, liquid transport, DNA testing, sorting and separation. The rapid development of nanotechnology and materials has brought new opportunities for the heat transfer of fluid. The research for fluid heat transfer microchannel has a very broad application prospects.We study the electroosmotic flow and heat transfer phenomena of Newtonian fluid in microchannel. On the basis of considering the fully developed electro-osmotic flow problems, Further to study the transient electro-osmotic flow in a generic sense. Considering the conductivity of the fluid are different, to study the transient electro-osmotic flow of two-layers Newtonian fluid. In addition, the paper studies the temperature distribution of the fully developed Newtonian fluid in micro-rectangular channel. Through theoretical analysis and numerical calculation, give variation of EOF electric potential field, flow and temperature fields and Nu number with the relevant parameters, such as electric width K, the ratio of Joule heat to wall heat flux S, the ratio micro-rectangular channel width to height a, the dielectric constant ratio ε of two fluids, the ratio of density p, the ratio of viscosity coefficient μ, the ratio of pressure p, the interface potential difference Δ(?), the interface charge density Q, the thickness of the two layers fluid, the pressure gradient B etc.. Through theoretical research provide an excellent theoretical guidance for the practical work and experimental topics.