Abstract
A boundary-layer analysis is presented to study the effect of intense thermal radiations on natural convection flow of Casson dusty particulate suspension past a truncated cone. Contribution of radiative heat flux in a two-phase model is reported by means of Rosseland diffusion approximation. In order to convert the governing equations into non-dimensional form, a continuous set of transformations is used and the resulting equations are integrated numerically via an implicit finite difference method. Numerical results for Casson dusty fluid flow characteristics are shown graphically under the variation of various important parameters. It is found that thermal radiation parameter, Rd, and dusty fluid parameter, alpha d, increase the magnitude of heat transfer rate. Casson rheological parameter, beta, has also pronounced effect on the flow and it increases the rate of heat transfer and reduces wall skin friction coefficient.