Abstract
Theoretical investigations are carried out for the cylindrical and spherical ion acoustic solitary waves (IASWs) in the presence of the kinematic viscosity in an electronegative plasma (ENP). By the reductive perturbation technique the damped KdV–Burgers equation is obtained, and its an approximate analytical solution is given. There exist two wave modes: fast and slow modes. By using the approximate solution, the effects of different physical parameters on the characteristics of the time dependent fast and slow IASWs are discussed. The results may have applications in the Earth’s ionosphere, where plasmas like (H+, O2−) and (H+, H−) exist.
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