Marginal Convective Instability of MHD Micropolar Fluid Layer Heated from Below

A theoretically investigation is worked out in micropolar fluid layer heated from below in the presence of uniform horizontal magnetic field. The governing differential equations are converted into non-dimensional form using suitable non-dimensional variables and then solved by normal mode technique and obtained thermal Reyleigh number. On the basis of this Rayleigh number stability criteria is examined and predict the behaviour of influenced parameters like magnetic field parameter, coupling parameter, micropolar heat conduction parameter and micropolar coefficient are shown through graphs.