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Related Experiment Video

Updated: Aug 9, 2025

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns

Published on: April 10, 2017

Heat fluctuations in chemically active systems.

Joël Mabillard¹, Christoph A Weber², Frank Jülicher^1,3,4

¹Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187, Dresden, Germany.

Physical Review. E

|February 17, 2023

Summary

This summary is machine-generated.

Active fluctuations in living systems, driven by chemical heat, dominate thermal fluctuations on large scales. This study provides a framework to understand these active systems and their fluctuations.

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Last Updated: Aug 9, 2025

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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Published on: August 1, 2017

Area of Science:

Biophysics
Statistical Mechanics
Chemical Physics

Background:

Living cells are chemically active systems maintained out of thermal equilibrium.
Chemical events generate heat, leading to active fluctuations.
Understanding the scales of active vs. thermal fluctuations is crucial.

Purpose of the Study:

To formulate a theoretical framework for heat fluctuations in active systems.
To determine the length and time scales where active fluctuations dominate thermal fluctuations.
To characterize the distinct behaviors of active and thermal fluctuations.

Main Methods:

Development of a stochastic field theory.
Inclusion of Poisson white noise to model heat fluctuations.
Analysis of active temperature fluctuations.

Main Results:

Active fluctuations dominate thermal fluctuations on large length and timescales.
Multiple crossovers in fluctuation dominance are observed at intermediate scales.
The framework characterizes fluctuations in active systems.

Conclusions:

Active fluctuations play a significant role in non-equilibrium systems.
Local equilibrium can be established at specific length and timescales.
The study offers insights into the fundamental nature of fluctuations in active matter.