Abstract
The characteristic of ion-acoustic solitary and shock waves propagating in a non-extensive plasma is analysed using the framework of the modified Korteweg–de Vries–Burgers (MKdVB) equation. Employing reductive perturbation technique (RPT), the MKdVB equation is derived from the basic guiding equations and further, the equation is converted to a dynamic system using travelling wave transformation. Varying different plasma parameters, phase portraits for the MKdV system are drawn and using bifurcation theory of planar dynamical system, it is observed that the MKdV system may contain shock, solitary and periodic solutions. However, it is evident from the phase portrait analysis of the MKdVB equation that due to the impact of Burgers term, the system includes only the shock and solitary solutions. Initially, different patterned solutions of the MKdV equation are directly derived from the corresponding Hamiltonian of the system, and employing the weighted residual method (WRM), the approximate analytical solutions of the MKdVB equation are explored using the solution of MKdV equation as initial solution. These solutions come as a desired pattern that was predicted by the phase portraits. Finally, some graphs are depicted from a numerical standpoint by which the effects of physical parameters on wave propagation are well understood.
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Acknowledgements
The authors are thankful to the reviewers for their valuable comments and suggestions which helped them to improve the quality of the paper. Mr Subrata Roy is thankful to the University Grants Commission (UGC) (No. 1106/2018), India, for the financial support in pursuing this research.
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Roy, S., Raut, S. & Kairi, R.R. Nonlinear analysis of the ion-acoustic solitary and shock wave solutions for non-extensive dusty plasma in the framework of modified Korteweg–de Vries–Burgers equation. Pramana - J Phys 96, 67 (2022). https://doi.org/10.1007/s12043-022-02302-5
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DOI: https://doi.org/10.1007/s12043-022-02302-5
Keywords
- Ion-acoustic solitary and shock waves
- modified Korteweg–de Vries–Burgers equation
- reductive perturbation technique
- phase portrait
- weighted residual method
- physical parameters