Electric Field Simulation Essay Example | Topics and Well Written Essays - 2500 words

Electric Field Simulation - Essay Example Through COMSOL Multiphysics we discovered the results after simulating an electric field by using 2D and 3D of the electrostatic module. These modules provided many kinds of movement in the electric field for the three electrodes, which were energised with +1V, 0V, and -1V electrical voltages. Also, the strong and weak points are posted between the three electrodes and show the electric potential of the field. Finally, this paper will show the form of the distribution of electric potential and electric field between the three electrodes for the above mentioned conditions. Introduction: After Michael Faraday discovered the electric field, he developed electricity into something practical that could be used in many technologies, especially microsystem devices. According to James Clear Maxwell, â€Å"the portion of space in the neighborhood of electrified bodies† is called an electric field [1]. At present, there are several applications used that are related to microtechnology a nd are beneficial to our lives. A good application in medicine is biology cells within medical laboratories. In this way, application is applied to the electric field to move cells and separate or analyze cells via impact electric forces. The movement, separation, and analyzing is done through a technique known as AC electrokinetics. This technique occurs when an electric field interacts with dipoles, but it depends on forces between repulsion and rotation by altering the nature of the dynamic field [2]. This new technique is beneficial in biotechnology because of the electric field [3]. Also, the AC electrokinetics technique depends on a delicate process known as dielectrophoresis. This is â€Å"the migration of uncharged particles towards the position of maximum field strength in a non-uniform electric field† [4]. The basic principle operation of dielectrophoresis is by deference of electromagnetic and dielectric properties. For example, the separation of cancer cells is be hind the electrodes, while the natural cells move away from the electrodes due to variations of the electric field [5]. Figure 1 shows the forces of attraction and repulsion between cancer cells and normal cells. Fig.1. Basic Principle of Dielectrophoresis An electric field is a region around a charged particle or object within which a force would be exerted on other charged particles or objects. It is defined as an area between two charges and then there is a force (positive or negative) exerted [6]. The forces exerted on the test charge will be directly proportional to another charge according to Coulomb’s law [7]: Fe ? q1 q2 If divide the forces on the test charge: E=Fe /q ' Where E = electric field (N/C) and F = force (N) and q' = charge on test charge (C) Also, according to Coulomb’s law, we can find E where: = the permittivity of free space Then we can calculate the electric flux by using Gausses’ law [8]: Q = ? E.d There is a relationship between the elec tric field and electric potential if the electric potential is identified in an action area, then we can calculate the value of the electric field by: dV = - E.d. However, the electric potential consists of lines called equipotential lines. There is a direct correlation between the electric field lines and the energy of electric potential because the first one always puts the electric potential of direction that causes dropping electric potential [9], whereas, in this case, we are dealing with an accelerometer that