Мақола

Nonlinear ion acoustic solitary waves in nonplanar geometry with nonthermal electrons and nonextensive positrons

Mohammad NasirDepartment of Physics, University of Sialkot. 1-Km Main, Daska Road, Sialkot, Punjab 51040, PakistanAli B.M. AliAir Conditioning Engineering Department, College of Engineering, University of Warith Al-Anbiyaa, Karbala, IraqAieza KhanDepartment of Physics, University of Sialkot. 1-Km Main, Daska Road, Sialkot, Punjab 51040, PakistanAyesha NoureenDepartment of Physics, University of Sialkot. 1-Km Main, Daska Road, Sialkot, Punjab 51040, PakistanNiaz WaliInstitute for Fusion Theory and Simulation School of Physics, Zhejiang University, Hangzhou, ChinaMuhammad Ikram UllahDepartment of Biological Sciences, University of Sialkot, Sialkot 51310, Punjab, PakistanMahmud KhanDepartment of Mechanical Engineering, College of Engineering, Prince Mohammad Bin Fahd University, Al-Khobar, Saudi ArabiaF. F. AlharbiDepartment of Physics, College of Science, Princess Nourah bint Abdulrahman University, P. O. Box 84428, Riyadh 11671, Saudi ArabiaEldor AbdurakhmonovDepartment of Chemistry-Biology, Termez State Pedagogical Institute, Termez, UzbekistanMumtaz KhanDepartment of Mechanical Engineering, College of Engineering, Prince Mohammad Bin Fahd University, Al-Khobar, Saudi Arabia

International Communications in Heat and Mass Transferjournal2025en

ABI

Аннотация

The nonlinear dynamics of ion acoustic solitary waves (IASWs) in nonplanar geometry are examined in a plasma comprising of adiabatic ions, nonthermal electrons (Cairns distribution), and nonextensive positrons (Tsallis statistics). To examine the deviations from planar wave characteristics. Both cylindrical and spherical geometries are studied. Using the reductive perturbation technique, a modified nonplanar Korteweg–de Vries–Bergers (KdVB) equation is obtained. The effects of positron nonextensivity, electron nonthermality, positron concentration, and temperature ratios on IASW properties are analytically studied. Results demonstrate that nonextensive and nonthermal structures strongly modify wave amplitude, width, and stability, while nonplanar geometry presents additional dispersive effects that can either increase or suppress localization. Both compressive and rarefactive solitons are originate, depending on plasma circumstances. This investigation offers new insights into solitary wave behavior in astrophysical and laboratory plasmas considered by nonthermal and nonextensive particle distributions.

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Мавзулар

Dust and Plasma Wave Phenomena Ionosphere and magnetosphere dynamics Nonlinear Photonic Systems

Идентификаторлар

DOI: 10.1016/j.icheatmasstransfer.2025.109946

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