Numerical Simulations of Plasma Plume Expansion into Low-Density ... | Samuel Barnes | RRS Live 2025 скачать в хорошем качестве

Numerical Simulations of Plasma Plume Expansion into Low-Density ... | Samuel Barnes | RRS Live 2025

Samuel Barnes is a Sophomore Mechanical Engineering major in the Randall Research Scholars Program (RRSP). Their research project presentation, "Numerical Simulations of Plasma Plume Expansion into Low-Density Background Gas," was completed under the advisement of Alexey Volkov from the Mechanical Engineering Department. Project Description: Laser ablation, the use of high-power lasers to heat and remove material from an object, has many applications, including advanced manufacturing systems and pulsed laser deposition (PLD) coatings. Ablated plasma experiences splitting into fast and slow components under certain conditions, e.g., low background gas pressure and high laser radiation intensity. Knowing the origin of plume splitting is key to making better usage of laser ablation technology, such as refining PLD coatings. To understand the nature of this splitting in a low-density background gas and the role of ionization effects, we perform 1D numerical simulations of a simplified plume expansion problem in the form of the Riemann problem. The computational results obtained with the Direct Simulation Monte Carlo (DSMC) method for neutral gas and plasma are compared with each other.