Simulation of Fixed Two Ends Micro Polymer Chain in Microchannel Using Dissipative Particle Dynamics

In this paper, DPD method is used to simulate the polymer chain in a micrometers channel with respect to electrosomalic micro pump and the influence of the effective parameters on the displacement of the polymeric chain will be investigated. Also, The effective parameters are validated. In the following, a two fixed ends polymeric chain is placed in the channel and the fluid flow will cause the polymer chain to move. It is shown that the amount of variation of the chain in addition to the influence of the parameters of the electro-osmotic current on the main parameters of the polymer chain is the same as the number of beads and the elastic property between the beads, and the best control parameter as well as the direction of movement of the polymer chain during operation is the electric field. It has been shown that with the change of electric field from 50 to 150 V / m, the amount of chain movement would be twice, while if the number of beads is added to 40, at electric field of 100 V / m, the displacement rate will be increased approximately 3 times. Also, the effect of the position of the installation has been checked and shown by changing the position of the installation from the vertical coordinates 4 and 4 to 9.5 and -9.5 micrometer, with consideration of the same chain movement, the electric field strength decreased by half, and the amount of oscillation decreases.