ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Temperature dependence of collision frequencies in gas and plasma systems: a two-dimensional simulation study

Ahmed Y. Owaid and Hanaa E. Jasim

Mosul Medical Technical Institute, Northern Technical University, Mosul, Iraq

E-mail: ahmedowaidphysics@ntu.edu.iq

Received: 11 January 2025  Accepted: 25 January 2025

Abstract:

A two-dimensional simulation was employed to investigate the influence of gas temperature on the collision frequency for both particle–wall and particle–particle collisions. The study examined the collision frequencies within the common temperature range of 0–100 °C. The results demonstrated that the particle–wall collision frequency was proportional to \(\sqrt T\), whereas the particle–particle collision frequency was proportional to \(1/\sqrt T\), where T represents the gas temperature. The particle–wall collision frequency exhibited higher values and less random dispersion around the fitted function compared to the particle–particle collision frequency. A significant deviation from the fitted function \(1/\sqrt T\) was observed at low particle densities. These findings validate the key predictions of kinetic theory and provide deeper insights into the molecular collision dynamics relevant to gaseous and plasma systems, particularly in scenarios involving temperature-dependent interactions.

Keywords: Gas particles; Gas temperature; Collision frequency; Container walls; Molecular collisions

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-025-03917-9

Chemical Papers 79 (4) 2201–2206 (2025)