The dynamics of microparticles when subjected to an electromagnetic field is a situation encountered in nature and several applications. For example, snow and rainfall estimates are done using scattering of waves released by radars. Optical tweezers, commonly used in biological sciences, are known for trapping and manipulating single molecules, where particles are trapped or manipulated by balancing the gradient and scattering forces. Further optical forces and torques are used in
nanosurgery, nanorobotics, light-driven microdrones and many others. Analytical solutions to describe the electromagnetic response of a micropoarticle are possible only for simple cases where the problem has specific symmetries, the shapes are simple or material is uniform. However, in reality, shapes are complex (snow flakes, rain drops, anisotropic colloids), made up of materials with varying properties, and therefore, it is necessary to undertake numerical studies. We have used a Lattice Boltzmann method to compute the scattered and total electric and magnetic fields when particles are exposed to electromagnetic waves. Using the Maxwell stress tensor, the radiation force and torques on the particles are calculated. Since the Lattice Boltzmann simulation is a relatively new method for electrodynamics and not yet tested for complex geometries, we have validated the method with the available analytical solutions for a cylindrical geometry - for infinitely long conducting and dielectric cylinders. Currently, the study focuses on calculating the force and torque on circular Janus cylinders kept at various orientations with the incident field.