Real-Time Electrical Current Measurement Method for Single-Bubble Scale Analysis in Two- Phase Flow

Dai Yihang; He Jiacheng; Chen Ying

doi:10.12465/issn.0253-4339.20260402001

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Real-Time Electrical Current Measurement Method for Single-Bubble Scale Analysis in Two- Phase Flow

更新时间：2026-06-04

- Real-Time Electrical Current Measurement Method for Single-Bubble Scale Analysis in Two- Phase Flow
- Journal of Refrigeration Pages: 1-9(2026)
- 作者机构：
  
  1.广东工业大学材料与能源学院广州 510006
  2. 广东省功能软凝聚态物质重点实验室广州 510006
- 作者简介：
- 基金信息：
  
  the National Natural Science Foundation of China(52436003)
- DOI：10.12465/issn.0253-4339.20260402001
  CLC： TK124;TK313
- Received：02 April 2026，
  
  Revised：2026-04-15，
  
  Accepted：16 April 2026，
  
  Online First：04 June 2026，
- 稿件说明：
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戴逸航，何嘉诚，陈颖. 两相流动中单气泡尺度实时电流测量法［J］. 制冷学报，XXXX，XX（XX）：1-9.

Dai Yihang，He Jiacheng，Chen Ying. Real-Time Electrical Current Measurement Method for Single-Bubble Scale Analysis in Two- Phase Flow［J］. Journal of Refrigeration，XXXX，XX（XX）：1-9.
戴逸航，何嘉诚，陈颖. 两相流动中单气泡尺度实时电流测量法［J］. 制冷学报，XXXX，XX（XX）：1-9. DOI： 10.12465/issn.0253-4339.20260402001.

Dai Yihang，He Jiacheng，Chen Ying. Real-Time Electrical Current Measurement Method for Single-Bubble Scale Analysis in Two- Phase Flow［J］. Journal of Refrigeration，XXXX，XX（XX）：1-9. DOI： 10.12465/issn.0253-4339.20260402001.

摘要

针对柔性电子热管理中两相换热器微通道内气泡生长特性难以可视化测量的问题，本文提出一种基于气液电导差异的单气泡尺度实时电流测量方法（简称RTECM法），结合单气泡在微通道中经历膨胀、延展和逃逸3个过程的可视化演变特性，建立了从电阻推导出气泡横截面面尺度与长度的理论方法，二者最大偏差为13.4%。进一步将RTECM法与传统可视化直接测量法进行了对比，发现RTECM法拥有敏感的电流分辨率（10

-11

A），可克服高速摄像仪分辨度和帧速率有限的不足。RTECM法可通过电流的微小变化探测气泡起始尺寸、气泡在微通道中膨胀的最大尺度以及气泡逃逸速率。最后对通道结构尺寸与溶液电导率等参数进行了敏感性分析。

Abstract

To address the challenges associated with visualizing and measuring bubble growth characteristics in the microchannels of two-phase heat exchangers used for flexible electronic thermal management， this study proposes a real-time electrical current measurement method （RTECM） based on the electrical conductivity differences between gas and liquid at the single-bubble scale. Using the visualized variation characteristics of a single bubble in a microchannel undergoing three processes （expansion， elongation， and escape）， a theoretical method was established for deriving the cross-sectional scale and length of the bubble from electrical resistance. The theoretical calculations showed good agreement with the experimental data， with a maximum deviation of 13.4%. Moreover， the RTECM method outperformed the visualization measurement method. The measurement results of the two methods were in good agreement. The results further showed that the RTECM method possesses a high current resolution （10⁻¹¹ A）， overcoming the limitations of high-speed CCD in terms of resolution and shooting angle. By capturing minor changes in electrical current， the minimum bubble size， maximum bubble expansion size， and escape speed in the channel can be measured. Finally， a sensitivity analysis was conducted to evaluate the effects of channel structural dimensions and solution electrical conductivity.

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references

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