Visualization and Analysis of APPJ-induced Liquid Flow in Biological Solution

IF 3.5 3区物理与天体物理 Q3 ENGINEERING, CHEMICAL

Plasma Chemistry and Plasma Processing Pub Date : 2026-06-09 DOI:10.1007/s11090-026-10681-5

Tongtong He, Xin Li, Yuesheng Zheng

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引用次数: 0

Abstract

The influence of atmospheric pressure plasma jet (APPJ) on liquid flow in biological solution was investigated. Gelatin biomolecules were dissolved in deionized (DI) water to simulate a biological solution, and the resulting liquid flow was visualized and quantitatively analyzed during APPJ treatment. For gelatin solutions, the dominant liquid flow regime during APPJ treatment is vertical downward flow. A vortex flow regime emerges only under conditions of low gelatin concentration and high APPJ working gas flow rate; however, this vortex flow contracts and dissipates with prolonged APPJ treatment. In the case of low gelatin concentration solution, the Marangoni effect is a potential contributing factor for the downward flow regime in gelatin solutions, whereas gas shear stress and electrohydrodynamic (EHD) forces induce vortex flow formation. In vortex flow regimes, the Marangoni effect dynamically competes with the combined action of shear stress and EHD forces. Concurrently, cross-linking reactions between APPJ and gelatin increase the dynamic viscosity of the solution, accelerating kinetic energy dissipation. In the case of high gelatin concentration solution, the formation of a surface cross-linked film impedes momentum transfer across the plasma-liquid interface, and the rapid relaxation of interfacial charges resulted that the EHD effect generates a downward force, thereby establishing downward flow as the dominant mechanism.

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appj诱导生物溶液中液体流动的可视化与分析

研究了常压等离子体射流（APPJ）对生物溶液中液体流动的影响。将明胶生物分子溶解在去离子水（DI）中模拟生物溶液，并对APPJ处理过程中产生的液体流动进行可视化和定量分析。对于明胶溶液，在APPJ处理过程中，主要的液体流动形式是垂直向下流动。只有在低明胶浓度和高APPJ工作气体流速条件下才会出现涡旋流动；然而，随着APPJ处理时间的延长，这种涡旋流动收缩并消散。在低明胶浓度溶液的情况下，马兰戈尼效应是明胶溶液中向下流动的潜在因素，而气体剪切应力和电流体动力（EHD）力则诱导涡旋流动的形成。在涡旋流动状态下，马兰戈尼效应动态地与剪切应力和EHD力的联合作用竞争。同时，APPJ与明胶之间的交联反应增加了溶液的动态粘度，加速了动能的耗散。在高明胶浓度溶液中，表面交联膜的形成阻碍了等离子体-液界面的动量传递，界面电荷的快速弛豫导致EHD效应产生向下的力，从而确立了向下流动的主导机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plasma Chemistry and Plasma Processing 工程技术-工程：化工

CiteScore

5.90

自引率

8.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Publishing original papers on fundamental and applied research in plasma chemistry and plasma processing, the scope of this journal includes processing plasmas ranging from non-thermal plasmas to thermal plasmas, and fundamental plasma studies as well as studies of specific plasma applications. Such applications include but are not limited to plasma catalysis, environmental processing including treatment of liquids and gases, biological applications of plasmas including plasma medicine and agriculture, surface modification and deposition, powder and nanostructure synthesis, energy applications including plasma combustion and reforming, resource recovery, coupling of plasmas and electrochemistry, and plasma etching. Studies of chemical kinetics in plasmas, and the interactions of plasmas with surfaces are also solicited. It is essential that submissions include substantial consideration of the role of the plasma, for example, the relevant plasma chemistry, plasma physics or plasma–surface interactions; manuscripts that consider solely the properties of materials or substances processed using a plasma are not within the journal’s scope.