Viscosity and thermal conductivity of nanofluids containing multi-walled carbon nanotubes stabilized by chitosan

Phuoc, Tran X.; Massoudi, Mehrdad; Chen, Ruey-Hung

doi:10.1016/j.ijthermalsci.2010.09.008

Cited by 305 publications

(127 citation statements)

References 42 publications

Supporting

Mentioning

105

Contrasting

Unclassified

Order By: Relevance

“…It is expected that the influence of the surfactant in terms of density and heat capacity of nanofluids is low. On the other hand we believe that the nature and the quantity of surfactant play a role in the viscosity of nanofluids, as recently shown by Phuoc et al [25] for multi-wall carbon nanotubes suspension stabilized by chitosan. However, this is below the scope of the present work.…”

Section: Nanofluidssupporting

confidence: 62%

Experimental investigations of the viscosity of nanofluids at low temperatures

et al. 2012

View full text Add to dashboard Cite

The effects due to temperature and shearing time on viscosity for Al 2 O 3 /water and CNT/water based nanofluids at low concentration and low temperatures are experimentally investigated. The viscosity data were collected using a stress-controlled rheometer equipped with parallel plate geometry under up and down shear stress ramp. CNT and Al2O3 water based nanofluids exhibited hysteresis behaviour when the stress is gradually loaded and unloaded, depending also on shearing time. Experiments also showed that the nanofluid suspensions indicated either Newtonian or nonNewtonian behaviour, depending on shear rate. CNT water based nanofluid behaves as Newtonian fluid at high shear rate whereas Al 2 O 3 water based nanofluid is non-Newtonian within the range of low temperatures investigated.

show abstract

Section: Nanofluidssupporting

confidence: 62%

Experimental investigations of the viscosity of nanofluids at low temperatures

et al. 2012

View full text Add to dashboard Cite

show abstract

“…It is non-toxic and biodegradable, and is widely used in medicine, agriculture and chemical and food processing areas. Therefore, this study uses it as a dispersant for Al 2 O 3 /water nanofluids [31][32][33].…”

Section: Related Theories and Calculationsmentioning

confidence: 99%

Estimation and experimental study of the density and specific heat for alumina nanofluid

Teng

Hung

2012

Journal of Experimental Nanoscience

121

View full text Add to dashboard Cite

This study analyses the density and specific heat of alumina (Al 2 O 3 )/water nanofluid to determine the feasibility of relative calculations. The Al 2 O 3 /water nanofluid was produced by the directsynthesis method with cationic chitosan dispersant served as the experimental sample, and was dispersed into three concentrations of 0.5, 1.0 and 1.5 wt.%. This experiment measures the density and specific heat of nanofluid with weight fractions and sample temperatures with a liquid density meter and a differential scanning calorimeter (DSC). To assess the availability of these equations, it then compares the experimental data with the calculated results according to the concepts of mixing theory and statistical mechanism. Comparing the calculated results of density and specific heat with the experimental data, the deviation of density fell within the range of À1.50% to 0.06% and 0.25% to 2.53%, whereas the deviation of specific heat fell within the range of À0.07% to 5.88% and À0.35% to 4.94%, respectively. Calculated results of density and specific heat show a trend of greater deviation with an increased concentration of nanofluid. However, two kinds of density and specific heat of the calculated results fall within an acceptable deviation range in this study.

show abstract

“…nano-particles, CNT) in a base fluid (nanofluid) has evolved over the past decade. The experiments have unveiled improvements in the rheological (Aladag et al 2012;Chen et al 2011;Jyothirmayee Aravind et al 2011;Lei et al 2008;Murshed et al 2008;Hobbie and Fry 2007;Vakili-nezhaad and Dorany 2009;Phuoc et al 2011;Liu et al 2005) as well as in the thermal (Ding et al 2006;Hwang et al 2006;Kalinina et al 2011;Ö zerinç et al 2010;Venkata Sastry et al 2008;Xie and Chen 2009;Kleinstreuer and Feng 2011;Choi et al 2001;Karthikeyan et al 2008;Xie et al 2002) properties of the nanofluid system, compared to its base fluid.…”

Section: Introductionmentioning

confidence: 99%

Thermal and rheological properties improvement of drilling fluids using functionalized carbon nanotubes

Fazelabdolabadi¹,

Khodadadi

Sedaghatzadeh

2014

Appl Nanosci

View full text Add to dashboard Cite

The application of functionalized/unfunctionalized (multi-walled) carbon nanotubes (CNT) was investigated in the context of formulating nano-based drilling fluids from water/oil-based fluid templates. CNT functionalization was attempted by applying hydrophilic functional groups onto the surface of the nanotubes via acid treatment. Experimental data were collected for thermal conductivity, viscosity/yield point, and filtrate amount in all samples. The time evolution of thermal conductivity was studied, as well as the effects of temperature and CNTs volume fraction on the parameter. Scanning electron microscopy (SEM) was used to monitor CNTs dispersion quality. The thermal conductivity results unveil considerable enhancements, by as much as 23.2 % (1 % vol. functionalized CNT) in CNT-water-based case at ambient temperature, with extended improvement of 31.8 % at an elevated temperature of 50°C. Corresponding results for the CNT-oil-based case exhibit an improvement in thermal conductivity by 40.3 % (unfunctionalized) and 43.1 % (functionalized) and 1 % volume fraction of CNT. The rheological results follow an analogous improvement trend. For the CNT-oil-based case, the filtration tests conducted at 138°C and 500 (psi) show a 16.67 % reduction in filtrate amount (1 % vol. CNT). The time evolution of thermal conductivity was found to nearly equalize (at an amount of 9.7 %) after 100 h of sample preparation in both functionalized and unfunctionalized CNT-oil-based cases.

show abstract

Viscosity and thermal conductivity of nanofluids containing multi-walled carbon nanotubes stabilized by chitosan

Cited by 305 publications

References 42 publications

Experimental investigations of the viscosity of nanofluids at low temperatures

Experimental investigations of the viscosity of nanofluids at low temperatures

Estimation and experimental study of the density and specific heat for alumina nanofluid

Thermal and rheological properties improvement of drilling fluids using functionalized carbon nanotubes

Contact Info

Product

Resources

About