Numerical Study on the Microflow Mechanism of Heat Transfer Enhancement in Nanofluids

A numerical study on nanofluids turbulent flow in a horizontal tube was conducted. The turbulent flow characteristics of nanofluids is revealed by investigating any differences between three models (Eulerian-Eulerian, Euler-Lagrange, and large eddy simulation (LES)-Lagrange) to explore the mechanism...

Full description

Saved in:
Bibliographic Details
Published in:Nanoscale and microscale thermophysical engineering 2014-04, Vol.18 (2), p.113-136
Main Authors: Peng, Wang, Minli, Bai, Jizu, Lv, Chengzhi, Hu, Yuyan, Wang
Format: Article
Language:English
Subjects:
Applied sciences
Chemistry
Colloidal state and disperse state
Computational fluid dynamics
Condensed matter: structure, mechanical and thermal properties
Energy
Energy. Thermal use of fuels
Euler-Lagrange
Eulerian-Eulerian
Eulers equations
Exact sciences and technology
Flow characteristics
Flows in ducts, channels, nozzles, and conduits
Fluid dynamics
Fluid flow
Fundamental areas of phenomenology (including applications)
General and physical chemistry
Heat transfer
Lagrange multiplier
LES-Lagrange
Mathematical models
Nanofluids
Nanostructure
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Physics
pressure drop
Simulation
Theoretical studies. Data and constants. Metering
Thermal properties of condensed matter
Thermal properties of small particles, nanocrystals, nanotubes
Turbulence
Turbulent flow
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A numerical study on nanofluids turbulent flow in a horizontal tube was conducted. The turbulent flow characteristics of nanofluids is revealed by investigating any differences between three models (Eulerian-Eulerian, Euler-Lagrange, and large eddy simulation (LES)-Lagrange) to explore the mechanism of heat transfer enhancement in nanofluids from the microflow aspect. The results indicated that the velocity slip between phases, growth of fluctuating velocity, increase of small-scale vortexes, and migration effect of nanoparticles may impose an important influence on heat transfer behavior of nanofluids. Therefore, the variation in fluid flow characteristics becomes the determining factor of pressure loss increment and heat transfer enhancement in nanofluids.
ISSN:1556-7265
1556-7273
DOI:10.1080/15567265.2013.856498