Self consistent calculations of the electric charge, ion drag force, and the drift velocity of spherical grains using Langevin dynamics and comparisons against canonical experiments

Author

venkata srinuvas sai kiran madugula

Date

2024

Document Type

Thesis

Degree Name

Master of Science

Department

Mechanical Engineering

Committee Chair

Ranganathan Gopalakrishnan

Committee Member

Yue Guan

Committee Member

Yong Hoon Lee

Abstract

The relative motion of ions with respect to objects/grains in a plasma leads to the ion drag force 1-5, like the drag force experienced by surfaces immersed in flows of neutral fluids. Ion drag force F ⃗_id plays a critical role in the collective motion and self-organization of grains in plasmas 6, 7, void formation in We present trajectory simulation-based modeling to capture the interactions between ions and charged grains in dusty or complex plasmas. Our study is motivated by the need for a self-consistent and experimentally validated approach for accurately calculating the ion drag force and grain charge that determine grain collective behavior in plasmas. We implement Langevin Dynamics in a computationally efficient multiscale approach to capture multiscale ion and grain dynamics. Along with critical assessments of our approach, suggestions for future experimental design to probe charging of and momentum transfer onto grains that capture the effect of space charge concentration and external fields are outlined.

Comments

Data is provided by the student.”

Library Comment

Dissertation or thesis originally submitted to ProQuest.

Notes

Open Access

Recommended Citation

madugula, venkata srinuvas sai kiran, "Self consistent calculations of the electric charge, ion drag force, and the drift velocity of spherical grains using Langevin dynamics and comparisons against canonical experiments" (2024). Electronic Theses and Dissertations. 3460.
https://digitalcommons.memphis.edu/etd/3460