Nonlinear dust acoustic waves in inhomogeneous four-component dusty plasma with opposite charge polarity dust grains

摘要: The reductive perturbation technique is employed to investigate the propagation properties of nonlinear dust acoustic (DA) waves in a four-component inhomogeneous dusty plasma (4CIDP). 4CIDP consists both positive- and negative-charge grains, characterized by different mass, temperature, density, addition background Maxwellian electrons ions. inhomogeneity caused nonuniform equilibrium values particle densities, fluid velocities, electrostatic potential leads significant modification nature DA solitary waves. It found that this model reveals two wave one slow, λs, other fast, λf. evolution governed modified Kortweg-de Vries equation, whose coefficients are space dependent. Both soliton types; compressive rarefactive allowed corresponding λs. However, only created numerical investigations illustrate dependence of...