Assessing colloidal stability of long term MWCNT based nanofluids

Lamas, Bruno; Abreu, Bruno; Fonseca, A.; Martins, Nélson; Oliveira, Mónica

doi:10.1016/j.jcis.2012.05.014

Cited by 63 publications

(29 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Energy content in Cuewater nanofluids was higher than that of Al 2 O 3 ewater nanofluids. Lamas [122] used an innovative technique to quantitatively characterize the colloidal stability of MWCNT-based nanofluids. The method evaluates colloidal dispersion of suspensions by applying a centrifugal field.…”

Section: Stability Of Nanofluidsmentioning

confidence: 99%

“…Functionalized MWCNT (D20e40 L10e30) suspended in (Deionized water) DW-60% EG provides the highest stabilization, which requires almost 50 years to fully settle. The settling velocity of MWCNT-based nanofluids decreased as aspect ratio and nanoparticle concentration (ref) increased [122]. Rosa [124] characterized silicaewater nanofluid, and the BS (Light backscattering) technique was employed for stability light backscattering.…”

Section: Stability Of Nanofluidsmentioning

confidence: 99%

See 1 more Smart Citation

A comprehensive review of thermo-physical properties and convective heat transfer to nanofluids

Solangi

Kazi

Luhur

et al. 2015

Energy

249

View full text Add to dashboard Cite

Section: Stability Of Nanofluidsmentioning

confidence: 99%

Section: Stability Of Nanofluidsmentioning

confidence: 99%

A comprehensive review of thermo-physical properties and convective heat transfer to nanofluids

Solangi

Kazi

Luhur

et al. 2015

Energy

249

View full text Add to dashboard Cite

“…This is due to the hydrophobic nature of CNTs, which have higher tendency to agglomerate in conventional fluids [23][24][25][26][27][28]. Stability is the main factor that contributes to thermo-physical performance [29].…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids

Abdullah¹,

Mohamad²,

Hashim³

et al. 2016

J. MECH. ENG. SCI.

View full text Add to dashboard Cite

This paper focused on thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids at three different temperatures (6C, 25C and 40C). For the preparation of nanofluids, a two-step method, comprised of homogenisation and sonication, was used on a mixture of MWCNT-OH, PVP and the base fluid. The results revealed that thermal conductivity was enhanced by about 8.86% for 0.8 wt% deionised water-based MWCNT-OH nanofluid, and by 5.37% for 0.2 wt% ethylene glycol-based MWCNT-OH nanofluid. Meanwhile, in viscosity test, the highest temperature of 40C exhibited lowest viscosity. This phenomenon happened only with ethylene glycol-based nanofluid, whilst the data on the viscosity of deionised water-based nanofluid was inconsistent at certain nanofluid concentrations . In conclusion, addition of MWCNT-OH into base fluid enhanced base fluid performance , giving it the potential to be used in cooling system applications.

show abstract

“…However, the stability of carbon nanotube based nanofluids remains a major concern among the thermal researchers. Several researchers have clearly indicated that the production of stable carbon nanotube based nanofluids is a challenging task due to the strong tendency of these nanoparticles to agglomerate, the high aspect ratio and the hydrophobic nature of the nanoparticles themselves (Garg et al, 2009;Lamas et al, 2012;. In addition, Hwang et al (2007) found that the stability of the nanofluids is strongly affected by the particles morphology, and the chemical structure of the particles and base fluids.…”

Section: Introductionmentioning

confidence: 99%

Stability and Thermal Conductivity Characteristics of Carbon Nanotube based Nanofluids

M.¹,

Leong²,

Risby³

2013

Int J Automot Mech Eng

View full text Add to dashboard Cite

Water, ethylene glycol and engine oil are commonly used in heat exchanger applications. However, these fluids possess low thermal conductivity. The technology advancement in nanotechnology has enabled nano size particles to be included in a base fluid. This new generation of fluids is known as nanofluids. Producing a stable nanofluid with improved thermal conductivity is a challenging process. In the present study, multiwalled carbon nanotubes (MWCNT) based nanofluids with or without surfactant were investigated for their stability and thermal conductivity. The study indicates that nanofluids with added polyvinylpyrrolidone (PVP) surfactant exhibit better stability than nanofluids without surfactant. About 22.2% thermal conductivity improvement was observed for water containing 0.5wt% of MWCNT and 0.01wt% of PVP surfactant. The thermal conductivity also increases with increase of the MWCNT's weight fraction. It can be concluded that the addition of PVP and MWCNT into base fluid (water) is vital to produce a stable nanofluid with improved thermal conductivity.

show abstract

Assessing colloidal stability of long term MWCNT based nanofluids

Cited by 63 publications

References 38 publications

A comprehensive review of thermo-physical properties and convective heat transfer to nanofluids

A comprehensive review of thermo-physical properties and convective heat transfer to nanofluids

Thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids

Stability and Thermal Conductivity Characteristics of Carbon Nanotube based Nanofluids

Contact Info

Product

Resources

About