Related Experiment Video
Updated: Oct 2, 2025
10:09
Fast Imaging Technique to Study Drop Impact Dynamics of Non-Newtonian Fluids
Published on: March 5, 2014
12.6K
Applications of digital speckle pattern shearing interferometry in characterization of fluids
Applied Optics
|February 24, 2022
Summary
Digital speckle pattern shearing interferometry, a sensitive optical method, is effectively applied to study fluid dynamics. This technique non-destructively measures density and diffusion in liquids and gases in real-time.
Area of Science:
- Optical Physics
- Fluid Dynamics
- Metrology
Background:
- Digital speckle pattern shearing interferometry (DSPSI) is a well-established optical technique.
- Traditionally, DSPSI is utilized for precise measurement of minute deformations in solid materials.
- Its application to fluid characterization remains less explored.
Purpose of the Study:
- To explore and demonstrate the applicability of DSPSI for characterizing liquid and gaseous samples.
- To showcase the technique's potential in non-destructive, real-time analysis of fluid properties.
Main Methods:
- Utilized digital speckle pattern shearing interferometry (DSPSI) for fluid analysis.
- Applied the technique to measure density (temperature) profiles in a candle flame and around a heated wire in air.
- Investigated the diffusion process in a binary liquid mixture and determined the diffusion coefficient.
Main Results:
- Successfully measured density and temperature profiles in gaseous environments (candle flame, heated wire).
- Quantified the diffusion coefficient in a binary liquid mixture.
- Demonstrated the high sensitivity and non-destructive nature of DSPSI for fluid studies.
Conclusions:
- Digital speckle pattern shearing interferometry is highly suitable for investigating fluid specimens.
- The technique offers real-time, non-destructive analysis capabilities for liquids and gases.
- DSPSI provides valuable insights into fluid properties like density profiles and diffusion.
