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The role of percolation and sheet dynamics during heat conduction in poly-dispersed graphene nanofluids
Soujit Sen Gupta, Saikat Chakraborty, ,
Published in
2013
Volume: 102
   
Issue: 16
Abstract
A thermal transport mechanism leading to the enhanced thermal conductivity of graphene nanofluids has been proposed. The graphene sheet size is postulated to be the key to the underlying mechanism. Based on a critical sheet size derived from Stokes-Einstein equation for the poly-dispersed nanofluid, sheet percolation and Brownian motion assisted sheet collisions are used to explain the heat conduction. A collision dependant dynamic conductivity considering Debye approximated volumetric specific heat due to phonon transport in graphene has been incorporated. The model has been found to be in good agreement with experimental data. © 2013 AIP Publishing LLC.
About the journal
JournalApplied Physics Letters
ISSN00036951
Open AccessYes
Concepts (14)
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    DYNAMIC CONDUCTIVITY
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    Enhanced thermal conductivity
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    Experimental datum
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    Graphene sheets
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    PHONON TRANSPORT
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    SHEET SIZE
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    STOKES EINSTEIN EQUATIONS
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    THERMAL TRANSPORT
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    Brownian movement
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    Graphene
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    Heat conduction
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    Nanofluidics
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    Solvents
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    Thermal conductivity