Imperial College London
Alternate

DrHenryBurridge

Faculty of Engineering, Department of Civil and Environmental Engineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 5201h.burridge Website

 
 
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Assistant

 

Miss Rebecca Naessens +44 (0)20 7594 5990

 
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Location

 

328ASkempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Burridge:2020:10.1098/rspa.2019.0829,
author = {Burridge, H and Hallstadius, O},
doi = {10.1098/rspa.2019.0829},
journal = {Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences},
title = {Observing the Mpemba effect with minimal bias and the value of the Mpemba effect to scientific outreach and engagement},
url = {http://dx.doi.org/10.1098/rspa.2019.0829},
volume = {476},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The Mpemba effect is the assertion that it is quicker to cool or freeze water when the initial temperature is high. We define the Mpemba effect to have been observed when two samples of water, one initially warmer than the other, are cooled and the initially hotter sample freezes or cools to a prescribed temperature in less time; this assumes that the samples are of the same mass, are at least as pure as drinking water, the cooling is delivered to both samples in the same manner and the same level of insulation is applied to both. Under this definition, we enable repeatable observations of the Mpemba effect by systematically introducing increased nucleation sites (in our case by roughening the container walls with sandpaper) within the cooling environment of the initially warmer sample. We remain able to observe the Mpemba effect when the enthalpy of cooling and freezing the initially warmer sample exceeds that of the initially cooler sample by over 50%, corresponding to a difference in the initial temperatures of around 50 °C. The context of this study, initiated by a high-school student who then carried out all of the experiments, highlights the value of the Mpemba effect as a tool for scientific learning and engagement.
AU  - Burridge,H
AU  - Hallstadius,O
DO  - 10.1098/rspa.2019.0829
PY  - 2020///
SN  - 1364-5021
TI  - Observing the Mpemba effect with minimal bias and the value of the Mpemba effect to scientific outreach and engagement
T2  - Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
UR  - http://dx.doi.org/10.1098/rspa.2019.0829
UR  - http://hdl.handle.net/10044/1/82202
VL  - 476
ER  -
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