Electrohydrodynamic fibrillation governed enhanced thermal transport in dielectric colloids under a field stimulus

Soft Matter
Purbarun DharA R Harikrishnan

Abstract

Electrorheological (ER) fluids are known to exhibit enhanced viscous effects under an electric field stimulus. The present article reports the hitherto unreported phenomenon of greatly enhanced thermal conductivity in such electro-active colloidal dispersions in the presence of an externally applied electric field. Typical ER fluids are synthesized employing dielectric fluids and nanoparticles and experiments are performed employing an in-house designed setup. Greatly augmented thermal conductivity under a field's influence was observed. Enhanced thermal conduction along the fibril structures under the field effect is theorized as the crux of the mechanism. The formation of fibril structures has also been experimentally verified employing microscopy. Based on classical models for ER fluids, a mathematical formalism has been developed to predict the propensity of chain formation and statistically feasible chain dynamics at given Mason numbers. Further, a thermal resistance network model is employed to computationally predict the enhanced thermal conduction across the fibrillary colloid microstructure. Good agreement between the mathematical model and the experimental observations is achieved. The domineering role of thermal cond...Continue Reading

References

Apr 17, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·J E Martin
May 25, 2002·Advances in Colloid and Interface Science·Tian Hao
Oct 30, 1992·Science·T C Halsey
Dec 9, 2016·Nanotechnology·Purbarun DharSarit K Das

❮ Previous
Next ❯

Methods Mentioned

BETA
scanning electron microscopy
optical microscopy

Related Concepts

Related Feeds

Cardiac Conduction System

The cardiac conduction system is a specialized tract of myocardial cells responsible for maintaining normal cardiac rhythm. Discover the latest research on the cardiac conduction system here.

Related Papers

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
B Horváth, I Szalai
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Sonia MelleGerald G Fuller
© 2022 Meta ULC. All rights reserved