LASER TECHNIQUE FOR LOCAL MASS TRANSFER

This paper discusses the use of laser techniques for local mass transfer measurements, highlighting their applications in various settings including fluid jets, corrosion, and non-contact measurement scenarios. The objective of the research is to quantify the convective local mass transfer coefficient during copper deposition from an H2SO4 + CuSO4 solution onto a nickel pipe cathode. The methodology involves using optical microscopy to measure the thickness of copper depositions after the samples are cut and polished. The analysis reveals a significant error contribution due to the cutting and polishing steps, suggesting that further calibration is required for more accurate results. The findings indicate that red lasers outperform green lasers for measuring local mass transfer, providing a more precise understanding of mass transfer processes over average values. The paper emphasizes that this laser technique is advantageous as it does not disrupt the flow profile or the surface during measurement. Future work aims to refine measurement accuracy by establishing optimal reflection angles and deposition thickness ranges for reliable assessments. The results contribute valuable insights into improving mass transfer measurement techniques.