11/09/2022
By Juan Trelles

The Francis College of Engineering, Department of Mechanical Engineering, invites you to attend a doctoral proposal defense by Tlegen Kamidollayev on "Modeling of Reactive Species Interphase Transport in Air Plasma Jet Impinging on Water."

Defense Date: Thursday, Dec. 1, 2022
Time: 11 a.m. to noon
Location: This will be a virtual defense via Zoom. Those interested in attending should contact the committee chair Juan_Trelles@uml.edu at least 24 hours prior to the defense to request access to the meeting

Committee Chair (Advisor): Juan Pablo Trelles, Associate Professor, Department of Mechanical Engineering, UMass Lowell

Committee Members:

  • Fanglin Che, Assistant Professor, Department of Chemical Engineering, UMass Lowell
  • Maria Carreon, Assistant Professor, Department of Mechanical Engineering, UMass Lowell
  • Noah Van Dam, Assistant Professor, Department of Mechanical Engineering, UMass Lowell

Abstract:
The interaction between low-temperature atmospheric pressure plasma and water is of primary relevance to an increasing number of applications, from water treatment to medicine. The interaction between an air plasma jet and water is investigated using a two-dimensional computational model encompassing interphase dynamics, multiphase species transport, and gas- and liquid-phase chemical reactions. A Volume-of-Fluid (VoF) method is used to capture the deformation of the interphase due to the impingement of the jet. Three interphase species transport models consistent with the VoF approach are evaluated, which are based on arithmetic, harmonic, and conditional volume averaging of diffusivities. Simulations of a streamer discharge-generated plasma jet impinging on water for different flow rates are presented. The resulting production and accumulation of reactive oxygen and nitrogen species corroborate prior findings in the research literature. Modeling results show that higher jet velocities and associate increased interface deformation lead to enhanced transport of reactive species across the plasma-water interphase.