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Communication Dans Un Congrès Année : 2021

Plasma jets in contact with liquids: vortex and fast flows

Résumé

Plasma jets are intensively studied for biomedicine applications but their fine control remains challenging due to the mutual interactions between plasma and target. Even considering the simplest scenario in a research laboratory, a plasma jet treating a 2D culture of cells, it is not known in detail how the physical environment of the micro-well may influence the treatment. This study aims to shed light on this topic by investigating how electro fluid dynamic (EFD) flows influence the delivery of the bioactive plasmagenerated reactive species when a plasma jet is used to treat a biologicallyrelevant liquid (i.e. PBS) in a standard tissue culture grade 24-well plate. The results show how the formation of complex EFD flows in the liquid induce a non-uniform distribution species. Shortly after the ignition of the plasma jet a fast stream can reach the bottom of the well, whereas a stable toroidal vortex mixing is observed few seconds later. Electric charge accumulation on the liquid surface and plasma induced gas swirling could be the causes of the liquid motions. Furthermore, the liquid depth/volume and the voltage polarity are found to be critical parameters in controlling the delivery of the RONS to the bottom of the well.
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Dates et versions

hal-03351897 , version 1 (23-09-2021)

Identifiants

  • HAL Id : hal-03351897 , version 1

Citer

A Stancampiano, S Dozias, Jean-Michel Pouvesle, P Escot Bocanegra, Robert Eric. Plasma jets in contact with liquids: vortex and fast flows. 3rd Journées Jeunes Chercheurs, Universités CVL, Mar 2021, Orléans, Tours, France. ⟨hal-03351897⟩
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