“…In Eulerian coordinate, the governing equations of the unsteady, adiabatic spherically symmetric flow of the non‐ideal gas in the presence of a gravitational field under the action of monochromatic radiation, neglecting viscosity, heat‐conduction, and radiation of the medium may be written as follows (cf Khudyakov, Nath and Takhar,() Zedan, and Nath): where r is the radial distance and t is the time, u is the fluid velocity, ρ is the density, p is the pressure, U m is the internal energy per unit mass, is the mass of the heavy nucleus at the centre, is the gravitational constant, F be monochromatic radiation at radial distance r and time t , and K is the absorption coefficient.…”