Scholarlink

<p>This study systematically investigates instability evolution and bubble formation in acoustically levitated droplets. Experiments using working fluids with distinct physical properties—deionized water, sodium dodecyl sulfate (SDS) solutions, glycerol solutions, and ethanol solutions across various initial volumes identified four distinct instability modes: edge-splash, central-fountain, mixed atomization, and collapse-induced bubble formation. Results demonstrate that droplet instability is governed by synergistic physical parameters. The initial volume dominates the overall deformation amplitude, while surface tension controls collapse dynamics and depth. Viscosity plays a complex, volume-dependent role: while retarding deformation rates, it acts as a stabilizer for large droplets, suppressing surface instabilities to allow greater deformation limits. Bubble formation requires a critical initial volume, decreasing with lower surface tension but varying non-monotonically with volatility. Notably, the bubble expansion ratio generally decreases as initial volume increases. Secondary bubble formation relies on liquid-film integrity and interfacial curvature. Specifically, pure ethanol droplets (25–60&#xa0;μL) exhibit stable secondary bubbling with a saturation plateau for larger volumes (&gt; 35&#xa0;μL). This research provides fundamental insights into coupled parameter effects governing acoustically levitated droplets, supporting advances in acoustic levitation control and containerless processing technologies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synergistic effects of initial volume and physical properties on instability and bubble formation in acoustically levitated droplets

  • 期刊论文

  • 发表日期：

    2026年3月16日

查看全文
  • Lu Zhang,
  • Qiang Zhang,
  • Dongxiang Wang,
  • Fangyang Yuan,
  • Xinjun Yang,
  • Jiyun Du,
  • Wei Yu

摘要

This study systematically investigates instability evolution and bubble formation in acoustically levitated droplets. Experiments using working fluids with distinct physical properties—deionized water, sodium dodecyl sulfate (SDS) solutions, glycerol solutions, and ethanol solutions across various initial volumes identified four distinct instability modes: edge-splash, central-fountain, mixed atomization, and collapse-induced bubble formation. Results demonstrate that droplet instability is governed by synergistic physical parameters. The initial volume dominates the overall deformation amplitude, while surface tension controls collapse dynamics and depth. Viscosity plays a complex, volume-dependent role: while retarding deformation rates, it acts as a stabilizer for large droplets, suppressing surface instabilities to allow greater deformation limits. Bubble formation requires a critical initial volume, decreasing with lower surface tension but varying non-monotonically with volatility. Notably, the bubble expansion ratio generally decreases as initial volume increases. Secondary bubble formation relies on liquid-film integrity and interfacial curvature. Specifically, pure ethanol droplets (25–60 μL) exhibit stable secondary bubbling with a saturation plateau for larger volumes (> 35 μL). This research provides fundamental insights into coupled parameter effects governing acoustically levitated droplets, supporting advances in acoustic levitation control and containerless processing technologies.