Abstarct: The presence of suspended particles in an electrolyte solution could locally alter the external electric field and then exert an interactive force on each other. This force is called particle-particle dielectrophoresis force. In the present study, with the assumption of thin electrical double laxyer, a transient numerical model has been developed and the Arbitrary Lagrangian-Eulerian (ALE) method has been considered to solve the flow field, the electric field and the motion of the solid particle simultaneously. Whenever the Brownian motion is negligible relative to the interactive particle-particle dielectrophoretic motion, a chain of particles, regardless of their initial positions, is expected along the electric field. Numerical analysis has shown that the particle-particle dielectrophoresis interaction leads to gathering the particles together and line them up along the electric field. Due to the increase of particle-particle dielectrophoresis force, particles accelerate at first and then decelerate as a result of rise in the hydrodynamic repulsive force. Later in this study, with the consideration of the dielectrophoretic motion of particles, two novel applications has been introduced. Microvalve and micromixer are the two applications which are designed baxsed on the conception of dielectrophoresis force. The microvalve contains a circular chamber with one inlet channel and two outlet channels. In order to block the outlet channels, a rotating body has been considered which is consists of a circular and a quadrant parts. Dielectrophoresis and hydrodynamic forces which are acting on the rotating body, are respectively the actuator of the rotating body exerted from the electric field and the repulsion exerted from the flow field. The maximum response time for the microvalve has been reported 0.25s which means, it takes 0.25s to reach and block the second outlet channel from the first one after applying the change in the electric field. The geometry of the micromixer is quite similar to the microvalve. Owning two quadrants is the only difference between them and the forces acting on the rotating parts are totally the same. In this study, the micromixer has been represented in two types – with or without the inlet and outlet channels. baxsed on the applied electric field frequency, the micromixer is able to homogenize the fluid concentration in less than a second with mixing performance of 97%.