A review on applications and challenges of nanofluids

Saidur, R.; Leong, Kin Yuen; Mohammad, Hadadi

doi:10.1016/j.rser.2010.11.035

Cited by 1,664 publications

(624 citation statements)

References 96 publications

Supporting

Mentioning

537

Contrasting

Unclassified

Order By: Relevance

“…Although nanolubricants are frequently used for friction tests, little is known about stability and degree of dispersion of these nanoparticles in viscous liquids [6,[10][11][12]. Due to their high Gibbs energy, colloidal nanoparticles are thermodynamically unstable under ambient conditions [13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Colloidal Stability of Metal Nanoparticles in Engine Oil under Thermal and Mechanical Load

2017

View full text Add to dashboard Cite

Extended colloidal stability and high dispersion degree of nanolubricants are required to avoid nanoparticle deposition in combustion engines and to reduce friction and wear. The simple and rapid one-step technique of pulsed laser ablation in liquids is employed to synthesize precursor-free and highly dispersed gold nanoparticles in lubricants while the colloidal stability is measured by optical spectroscopy and transmission electron microscopy. A remarkable colloidal stability is determined under engine-like and ambient conditions for nine months in terms of constant primary particle size. In contrast to additive-free oils, almost no agglomeration is observed, which might be attributed to the attachment of engine oil additives or pyrolyzed/oxidized molecules to the nanoparticles preventing attractive nanoparticle interactions.

show abstract

Section: Introductionmentioning

confidence: 99%

“…To prevent a change of thermal conductivity and tribological properties of the nanolubricant over time, a detailed investigation of colloidal stability under ambient and harsh conditions is needed [6,11,12,14,16]. Obviously, a high colloidal nanoparticle stability requires a good dispersion of nanoparticles in the liquid.…”

Section: Introductionmentioning

confidence: 99%

Colloidal Stability of Metal Nanoparticles in Engine Oil under Thermal and Mechanical Load

2017

View full text Add to dashboard Cite

show abstract

“…Nanofluidic technologies are advancing rapidly, and a range of new technical opportunities are emerging, for example, efficient filtration of water using carbon nanotubes (CNT) (Alexiadis and Kassinos 2008;Mattia and Gogotsi 2008), heat removal and control in high heat-flux systems such as nuclear reactors, micro/nano-electro-mechanical systems (MEMS/NEMS), and micro-chemical reactors (Saidur et al 2011;Wen et al 2009). However, the prediction of the fluid mass flow rate and heat transfer in nanoscale systems presents a major barrier to their design.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics pre-simulations for nanoscale computational fluid dynamics

Holland

Lockerby

Borg

et al. 2014

Microfluid Nanofluid

View full text Add to dashboard Cite

We present a procedure for using molecular dynamics (MD) simulations to provide essential fluid and interface properties for subsequent use in computational fluid dynamics (CFD) calculations of nanoscale fluid flows. The MD pre-simulations enable us to obtain an equation of state, constitutive relations, and boundary conditions for any given fluid/solid combination, in a form that can be conveniently implemented within an otherwise conventional Navier-Stokes solver. Our results demonstrate that these enhanced CFD simulations are then capable of providing good flow field results in a range of complex geometries at the nanoscale. Comparison for validation is with full-scale MD simulations here, but the computational cost of the enhanced CFD is negligible in comparison with the MD. Importantly, accurate predictions can be obtained in geometries that are more complex than the planar MD pre-simulation geometry that provides the nanoscale fluid properties. The robustness of the enhanced CFD is tested by application to water flow along a (15,15) carbon nanotube, and it is found that useful flow information can be obtained.

show abstract

“…More heat transfer surface between particles and fluids, high dispersion stability and reduced wearing and clogging are the main advantages of nanofluids in comparison with conventional solid-liquid suspensions [1]. Over the last two decades, the study of nanofluids as potential heat transfer fluids has received significant attention, especially after Masuda et al [2] and Choi [3] reported significant enhancement of nanofluid thermal conductivities compared with conventional working fluids.…”

Section: Introductionmentioning

confidence: 99%