Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Thermal Strain

Thermal Strain

Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...

Joule-Thomson Effect

Joule-Thomson Effect

The Joule-Thomson effect, also known as the Joule-Kelvin effect, describes the temperature change of a fluid when it is forced through a valve or porous plug while keeping it in a thermally insulated environment. This experiment is called a throttling process. This is an important effect widely used in refrigeration and the liquefaction of gases.
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...

Deriving the Speed of Sound in a Liquid

Deriving the Speed of Sound in a Liquid

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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

A thermally shielded acoustofluidic device for robust particle focusing.

Ultrasonics·2026

Same author

Microfluidic shape-based separation for cells and particles: recent progress and future perspective.

Lab on a chip·2026

Same author

Acoustofluidic Plasmapheresis System Designed for Ultralow Blood Volume Applications.

Analytical chemistry·2026

Same author

High-energy-density acoustofluidic device using a double-parabolic ultrasonic transducer.

Physical review applied·2025

Same author

Thermoacoustic streaming in a linear temperature gradient.

Physical review. E·2025

Same author

Continuous and tunable droplet splitting using standing-wave acoustofluidics.

Lab on a chip·2025

Search research articles

Related Experiment Video

Updated: Jan 16, 2026

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Published on: May 15, 2017

Configurable thermoacoustic streaming by laser-induced temperature gradients.

Franziska Martens¹, Wei Qiu¹, Ola Jakobsson¹

¹Department of Biomedical Engineering, Lund University, 223 63 Lund, Sweden.

Physical Review Applied

|September 29, 2025

Summary

Researchers control micro-object motion in microchannels using temperature-dependent acoustic forces. Modulating heat sources alters streaming flow patterns, enabling tunable microfluidic control for applications like cell sorting.

More Related Videos

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

Published on: December 5, 2025

Related Experiment Videos

Last Updated: Jan 16, 2026

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Published on: May 15, 2017

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

Published on: December 5, 2025

Area of Science:

Acoustofluidics
Microfluidics
Biomedical Engineering

Background:

Acoustically actuated microchannels enable precise control of micro-objects.
Applications include rare cell studies and cell sorting.
Acoustic body forces interact with fluid property gradients.

Purpose of the Study:

To investigate the effect of optically induced temperature gradients on acoustic streaming flow.
To demonstrate tunable control of microfluidic streaming using thermal fields.
To analyze the transition of streaming patterns based on heat source location.

Main Methods:

Inducing temperature gradients optically via light absorption in a microfluidic channel.
Measuring streaming flow using 3D particle tracking.
Conducting experiments and simulations under varying thermal conditions.

Main Results:

Shifting heat source location changed streaming rolls from four to two.
Modulating optical absorbance tuned streaming velocity; higher absorption increased speed.
Asymmetric heat generation led to increased velocity components along the laser direction.

Conclusions:

Optical control of thermal fields offers a method to manipulate acoustic streaming in microchannels.
The study demonstrates a tunable platform for microfluidic manipulation.
Findings have implications for targeted particle manipulation in biological and medical applications.