Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Refrigerators and Heat Pumps01:07

Refrigerators and Heat Pumps

2.4K
Refrigerators or heat pumps are heat engines operating in a reverse direction. For a refrigerator, the focus is on removing heat from a specific area, whereas, for a heat pump, the focus is on dumping heat into one particular area. A refrigerator (or heat pump) absorbs heat Qc from the cold reservoir at Kelvin temperature Tc and discards heat Qh to the hot reservoir at Kelvin temperature Th, while work W is done on the engine’s working substance.
A household refrigerator removes heat from...
2.4K
Drawing Free-body Diagrams: Rules01:16

Drawing Free-body Diagrams: Rules

13.2K
The first step in describing and analyzing most phenomena in physics involves the careful drawing of a free-body diagram. Free-body diagrams are useful in analyzing forces acting on an object or system, and are employed extensively in the study and application of Newton's laws of motion. The steps to draw a free-body diagram are listed below:
13.2K
The Carnot Cycle and the Second Law of Thermodynamics01:20

The Carnot Cycle and the Second Law of Thermodynamics

2.8K
The Carnot engine works between two heat reservoirs of fixed temperatures. The Carnot cycle begs the following question: Is it possible to devise a heat engine that is more efficient than a Carnot engine between two fixed temperatures? The answer lies in designing a Carnot refrigerator.
Since the individual steps in a Carnot cycle can be reversed, the entire cycle is, thus, reversible. If a Carnot cycle is reversed, it becomes a Carnot refrigerator. It extracts heat Qc from a cold reservoir at...
2.8K
Eddy Currents01:25

Eddy Currents

1.7K
Since eddy currents occur only in conductors, magnets can separate metals from other materials. For example, in a recycling center, trash is dumped in batches down a ramp, beneath which lies a powerful magnet. Conductors in the trash are slowed by eddy currents, while nonmetals in the trash move on, separating from the metals. This works for all metals, not just ferromagnetic ones.
Other major applications of eddy currents appear in metal detectors and the braking systems of trains and roller...
1.7K
Statements of the Second Law of Thermodynamics01:15

Statements of the Second Law of Thermodynamics

4.1K
The second law of thermodynamics can be stated in several different ways, and all of them can be shown to imply the others. The Clausius’ statement of the second law of thermodynamics is based on the irreversibility of spontaneous heat flow. It states that heat will not flow from the colder body to the hotter body unless some other process is involved. Additionally, as per the Kelvin’s statement, it is impossible to convert the heat from a single source into work without any other...
4.1K
Faraday Disk Dynamo01:23

Faraday Disk Dynamo

2.4K
A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
2.4K

You might also read

Related Articles

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

Sort by
Same author

Transport properties of active particles moving on adjustable networks.

Soft matter·2026
Same author

Quantifying Surfactant Adsorption at Fluid Interfaces by Combining X-ray Reflectivity and Simulations.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Flocking as a continuous phase transition in self-aligning active crystals.

The Journal of chemical physics·2026
Same author

Active Particles in Tunable Compressible Environments.

Small science·2026
Same author

When velocity autocorrelations mirror force autocorrelations: Exact noise-cancellation in interacting Brownian systems.

Physical review. E·2026
Same author

Dynamical Density Functional Theory for Dense Odd-Diffusive Fluids.

The journal of physical chemistry. B·2026
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
See all related articles

Related Experiment Video

Updated: Aug 23, 2025

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
07:18

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

14.7K

Active Refrigerators Powered by Inertia.

Lukas Hecht1, Suvendu Mandal1, Hartmut Löwen2

  • 1Institut für Physik kondensierter Materie, Technische Universität Darmstadt, Hochschulstraße 8, D-64289 Darmstadt, Germany.

Physical Review Letters
|November 4, 2022
PubMed
Summary
This summary is machine-generated.

We developed a novel refrigerator using active Brownian particles to achieve significant cooling. This technology exploits unique phase diagrams to enable targeted cooling and environmental remediation without isolating walls.

More Related Videos

Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators
14:42

Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators

Published on: April 25, 2020

8.4K
Reversible Cooling-induced Deactivations to Study Cortical Contributions to Obstacle Memory in the Walking Cat
09:43

Reversible Cooling-induced Deactivations to Study Cortical Contributions to Obstacle Memory in the Walking Cat

Published on: December 11, 2017

7.0K

Related Experiment Videos

Last Updated: Aug 23, 2025

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
07:18

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

14.7K
Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators
14:42

Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators

Published on: April 25, 2020

8.4K
Reversible Cooling-induced Deactivations to Study Cortical Contributions to Obstacle Memory in the Walking Cat
09:43

Reversible Cooling-induced Deactivations to Study Cortical Contributions to Obstacle Memory in the Walking Cat

Published on: December 11, 2017

7.0K

Area of Science:

  • Physics
  • Thermodynamics
  • Soft Matter Physics

Background:

  • Active Brownian particles exhibit unique phase behaviors.
  • Controlling particle interactions is key for thermodynamic applications.

Purpose of the Study:

  • To present the operational principle of a novel refrigerator based on inertial effects in active Brownian particles.
  • To demonstrate local temperature reduction significantly below environmental levels.

Main Methods:

  • Exploiting the phase diagram of inertial active Brownian particles.
  • Initiating motility-induced phase separation in a specific cooling regime.

Main Results:

  • Achieved local temperature reduction of 2 orders of magnitude below environmental temperature.
  • Demonstrated operation without requiring isolating walls.

Conclusions:

  • The active refrigerator principle offers a new method for localized cooling.
  • Potential applications include environmental remediation through absorption and trapping of substances.