Mpemba Effect: Supercomputer Simulation Confirms Hot Water Freezes Faster

Syllabus: Science and Technology - Developments and Applications

Ministry of Science & Technology

Why in news?

Researchers from JNCASR have used supercomputer simulations to provide evidence for the Mpemba effect (hotter water freezing faster than colder water) and demonstrated it in systems other than water.

⚛️Static Concepts

Thermodynamics LawsNucleationSupercomputing in India

📌

Prelims-Oriented Points

Mpemba Effect: The counter-intuitive phenomenon where hotter liquid freezes faster than colder liquid under specific conditions.
Mechanism: Hotter water may 'choose' a quicker path to nucleation (birth of ice), bypassing intermediate molecular arrangements that trap colder water.
Study by: Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), an autonomous institute of DST.
Significance: Proves it is an 'out-of-equilibrium' phenomenon; relevant for thermal control in electronics.

⚠️

Examiner's Trap: The Mpemba effect is NOT universal for all liquids or conditions; it depends on the relaxation path of the molecules.

Quick Data Points

First supercomputer simulation of this effect

Published in 'Communication Physics'

Applicable to systems beyond water (e.g., magnetic systems)

Mains Value Addition

GS-3: Scientific Developments; Indigenization of Technology.

Theoretical Physics: improved understanding of 'out-of-equilibrium' thermodynamics and phase transitions.
Applications: Potential use in optimizing cooling strategies for next-gen electronics and materials science.
Institutional Excellence: Highlights capability of Indian research institutes (JNCASR) in fundamental physics simulations.

Source

Press Information Bureau (PIB)

🔍

Strategy Deep Dive