Related Experiment Video
Updated: Oct 11, 2025

08:31
Three-dimensional Optical-resolution Photoacoustic Microscopy
Published on: May 3, 2011
18.4K
Low-consumption photoacoustic method to measure liquid viscosity
Yingying Zhou1,2,3,4, Chao Liu1,4, Xiazi Huang2,3,4
1Department of Biomedical Engineering, City University of Hong Kong, Hong Kong.
Biomedical Optics Express
|December 3, 2021
Summary
This study introduces a novel photoacoustic method for rapid and low-volume liquid viscosity measurement using a microfluidic tube, offering a convenient alternative to traditional viscometers.
Area of Science:
- Biomedical Engineering
- Materials Science
- Analytical Chemistry
Background:
- Accurate viscosity measurement is crucial in biomedicine and industry.
- Conventional viscometers often require large sample volumes and are time-consuming.
- Existing microfluidic viscometry methods face challenges with process speed and complex designs.
Purpose of the Study:
- To develop a novel, efficient, and user-friendly method for liquid viscosity measurement.
- To overcome the limitations of traditional and current microfluidic viscometry techniques.
- To present a photoacoustic-based approach for viscosity determination in microfluidic systems.
Main Methods:
- Utilized a photoacoustic technique for viscosity measurement.
- Employed a simple microfluidic-based tube for fluid handling.
- Focused on achieving fast detection speeds and minimal sample consumption.
Main Results:
- Demonstrated a significantly faster detection speed compared to traditional methods.
- Achieved viscosity measurements with low fluid consumption.
- Validated the efficacy of the photoacoustic method in a microfluidic setup.
Conclusions:
- The developed photoacoustic method offers a rapid and low-volume solution for liquid viscosity measurement.
- This technique provides a convenient and efficient new tool for diverse applications.
- The microfluidic-based photoacoustic viscometry shows promise for broader adoption.
Related Concept Videos
Deriving the Speed of Sound in a Liquid
658
As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
The speed of sound in fluids can be derived by considering a mechanical wave...
The speed of sound in fluids can be derived by considering a mechanical wave...
658
Viscosity
6.4K
When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup.
The SI unit of viscosity is...
The SI unit of viscosity is...
6.4K
Measurement of Fluid Pressure
336
Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
336

