Morphology and dynamics scaling of water sheet jets generated by microfluidic convergent nozzles

IF 2.8 2区工程技术 Q2 ENGINEERING, MECHANICAL

Experimental Thermal and Fluid Science Pub Date : 2025-03-28 DOI:10.1016/j.expthermflusci.2025.111480

Alexandros Peteinaris , Priyanka Sinha , Julian Schmid , Alexandros Terzis

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Abstract

The morphological dynamics of water sheet jets generated by microfluidic convergent nozzles represent a critical area of research with significant implications for advancing controlled spray formation. This study employs anodically bonded Silicon wafer chips with etched converging nozzle geometries to investigate the effects of geometric parameters under varying flow conditions. High-speed shadowgraph imaging is utilized to assess the influence of nozzle thickness, outlet width, converging angle, and flow rate on the size and stability of water sheet jets. Experimental results demonstrate that sheet size is primarily governed by flow rate, while stability is strongly affected by nozzle design. Scaling correlations are developed to quantitatively describe water sheet dimensions and transitions between jet breakup, stable sheets, and unstable sheet spray breakup. These findings advance the understanding of water sheet jet dynamics and provide a robust framework for designing microfluidic systems optimized for planar and controlled spray formation.

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微流控会聚喷嘴水片射流的形态与动力学尺度

微流控会聚喷嘴产生的水片射流的形态动力学是一个重要的研究领域，对推进可控喷雾形成具有重要意义。本研究以阳极结合矽晶片为研究对象，探讨几何参数在不同流动条件下的影响。利用高速影影成像技术，评估了喷嘴厚度、出口宽度、会聚角和流量对水片射流尺寸和稳定性的影响。实验结果表明，叶片尺寸主要受流量的影响，而稳定性则受喷嘴设计的影响较大。尺度关系的发展，定量描述水片的尺寸和过渡之间的射流破碎，稳定的片，和不稳定的片喷雾破碎。这些发现促进了对水片射流动力学的理解，并为设计优化平面和受控喷雾形成的微流体系统提供了一个强大的框架。

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来源期刊

Experimental Thermal and Fluid Science 工程技术-工程：机械

CiteScore

6.70

自引率

3.10%

发文量

159

审稿时长

34 days

期刊介绍： Experimental Thermal and Fluid Science provides a forum for research emphasizing experimental work that enhances fundamental understanding of heat transfer, thermodynamics, and fluid mechanics. In addition to the principal areas of research, the journal covers research results in related fields, including combined heat and mass transfer, flows with phase transition, micro- and nano-scale systems, multiphase flow, combustion, radiative transfer, porous media, cryogenics, turbulence, and novel experimental techniques.