Mass Fraction Of Nanoparticles Research Articles

Thermal performance and friction factor of a cylindrical microchannel heat sink cooled by Cu-water nanofluid

The utilization of nanofluids of various types as cooling or heating working fluids has given incentive to enhanced heat transfer resulting in even smaller heat exchangers for a given heat duty. In this study, convective heat transfer coefficients and friction factor of copper nanofluids in a cylindrical microchannel heat sink were investigated. Copper nanoparticles with various mass fractions were used for two heat fluxes of 35 and 50 kW/m2. The effect of nanoparticle mass fraction and Re on local convective heat transfer coefficients, and the local Nusselt number was also studied. The experimental results showed that increased mass fraction of nanoparticles from 0.05 to 0.3 wt% resulted in lower thermal resistances of up to 21%. Moreover, the local heat transfer coefficients helped to experimentally determine the thermal entrance length for the microchannel heat sink. The presence of nanoparticles enhanced the entrance Nu up to 43% while the friction factor also increased up to 45.5% compared with that of pure water. Two correlations were finally proposed for the prediction of the Nusselt number and friction factor for the attempted nanofluid in the microchannel which agreed well with the experimental data.

Experimental Research on Heat Transfer Characteristics of CuO Nanofluid in Adiabatic Condition

The laminar convective heat transfer behavior of CuO nanoparticle dispersions in glycol with the average particle sizes (about 70 nm) was investigated experimentally in a flow loop with constant heat flux. To enhance heat exchange under high temperature condition and get the more accurate data, we try to improve the traditional experimental apparatus which is used to test nanofluid heat transfer characteristics. In the experiment five different nanoparticle concentrations (0.25%, 0.50%, 0.80%, 1.20%, and 1.50%) were investigated in a flow loop with constant heat flux. The experimental results show that the heat transfer coefficient of nanofluid becomes higher than that of pure fluid at the same Reynolds number and increased with the increasing of the mass fraction of CuO nanoparticles. Results also indicate that at very low volume concentrations nanofluid has no major impact on heat transfer parameters and the pressure of nanofluids increased by the mass fraction increase.

Addition of MgO Nanoparticles to Carbon Structural Steel and the Effect on Inclusion Characteristics and Microstructure

An innovative approach for pre-dispersing MgO nanoparticles with AlSi alloy nanoparticles was established, and the nanoparticles were dispersed well in carbon structural steel. After adding different mass fractions of MgO nanoparticles in steel, the majority of inclusions contained MgO·Al2O3 spinel and MgO-Al2O3-bearing hybrid inclusion, and these inclusions promoted acicular ferrite (AF) formation. With increasing amount of added nanoparticles, the average inclusion size increased from 0.90 to 1.50 μm and the inclusion size was considerably refined, but the ability of inclusions to induce AF was greatly declined. It was revealed that the inclusion size was the decisive factor influencing the inducing ability of inclusions for AF, which also got a solid support from the nucleation thermomechanical and dynamic analyses. When the mass fraction of MgO nanoparticles reached 0.05 pct, the proportion of AF in microstructure is relatively larger and the degree of interlocking of the AF within the microstructure was optimized. The ferrite grains also got refined and the average grain size decreased by more than 94 pct compared with that of the original steel.

Improved heat transfer and flow resistance achieved with drag reducing Cu nanofluids in the horizontal tube and built-in twisted belt tubes

Experimental studies were performed to investigate drag reducing nanofluids’ convective heat transfer coefficient and flow resistance coefficient at Reynolds numbers ranging from 2000 to 18000. Added 0–0.5% mass fraction of Cu nanoparticles into a concentration of 100–400mg·kg−1 cetyl trimethyl ammonium chloride (CTAC), which is a drag reducing fluid. The ratio of two kinds of fluids was explored to find a suitable composition and preparation to define their overall convective heat transfer and flow characteristics. Results indicated that the addition of sodium salicylate (NaSal) in CTAC with deionized water creates an improved drag reducing fluid with stability. When the drag reducing fluid concentration reached 200mg·kg−1, it reached its optimum drag reducing performance in horizontal tube experiments. Experiments with built-in twisted belt tubes resulted in a much improved convective heat transfer characteristic. Results showed using drag reducing Cu nanofluids the heat transfer coefficient will be approximately twice as large as that found in a horizontal tube and the flow resistance coefficient is approximately ten times greater. However, even though built-in twisted belt tubes can enhance heat transfer, they also increase flow resistance. Heat transfer and flow resistance correlations of the drag reducing Cu nanofluids in a horizontal tube and built-in twisted belt tubes were compared with final results showing the calculated and experimental values to be in good agreement. When Cu nanoparticle mass fraction is 0.4%, drag reducing Cu nanofluid has the best heat transfer and drag reducing characteristics. Finally, the overall K factor performance were greater than 1 at different concentrations, which indicated their convective heat transfer enhancing effect was stronger than the reducing flow resistance effect so that they can be used to solve the problem of heat transfer deterioration for drag reducing fluids.

Effect of Particle Size on Dispersibility of Antimony Nanoparticles in Lubricating Oil

Antimony nanoparticles, whose surfaces were modified by alkylphenol polyoxyethylene ether, with various particle sizes were prepared by electrochemical method. The dispersibility of antimony nanoparticles in 32# engine oil was characterized by means of steady-state sedimentation experiment and spectrophotometric method when the resulting antimony nanoparticles with various particle sizes were dispersed in lubricating oil with 0.5% of mass fraction. The results show that the particle size of antimony nanoparticle has significant effect on its dispersibility in lubricating oil. When the mass fraction of antimony nanoparticles in lubricating oil is 0.5%, the steric hindrance effect of surface adsorption layer coating on particles surface increases with decreasing of particle size. Meanwhile, the aggregating probability decreases among nanoparticles under the action of the collision generated by Brownian motion. As a result, the sedimentation velocity of nanoparticles in lubricating oil becomes slower and the dispersion stability of antimony nanoparticles in lubricating oil becomes better.

Effects of MgO Nanoparticle Additions on the Structure and Mechanical Properties of Continuously Cast Steel Billets

A new approach for pre-dispersing MgO nanoparticles and adding them to molten steel during continuous casting operations was established. The influence of different mass fractions of MgO nanoparticles on inclusion characteristics, steel microstructure, and the ability of inclusions to induce acicular ferrite (AF) formation, was investigated. The results revealed that after adding different mass fractions of nanoparticles, the majority of inclusions contained MgO-Al2O3, and the inclusion size was considerably refined. These inclusions promoted AF formation, and with increasing inclusion size from 1.0 to 1.8 μm, the proportion of AF progressively increased. The ability of inclusions to induce AF was greatly reduced when the inclusion size reached 7.0 μm. This was primarily due to the relationship between the ferrite nucleation rate and inclusion size. It was also found that the size of inclusions that functioned as pinning particles was larger than that of inclusions that served as AF nucleation cores. When the mass fraction of MgO nanoparticles reached 0.05 pct, the degree of interlocking of AF within the microstructure of billet specimens was maximized and this was associated with optimal values for strength and impact properties.

Structure and Properties of W-Cu/AlN Composites Prepared via a Hot Press-Sintering Method

Abstract W-30wt% Cu nano-crystalline powder was prepared by high-energy ball-milling, and then different mass fractions of AlN nanoparticles were added to the powder via the ball-milling. Finally W-30Cu/x% AlN composites were obtained by hot press-sintering process. The microstructures, the physical and mechanical properties of as-sintered composite samples were studied. The results indicate that the W-30Cu/x% AlN composites possess denser and more uniform microstructure. Moreover, the degree of refinement of W particles and the hardness of the composites increase with the addition of AlN, but the bending strength decreases with increasing of AlN nanoparticles due to the nanoparticles excessive distribution on the grain boundaries of the matrix. It is beneficial to increase thermal conductivity of W-Cu composites, when the content of AlN nanoparticles is ≤1%. Resistivity of the composites increases with increasing the amount of AlN nanoparticles, but the conductivity of the composites declines.

Experimental investigation on heat transfer and pressure drop of ZnO/ethylene glycol-water nanofluids in transition flow

Transition regime convection heat transfer coefficients of zinc oxide/ethylene glycol–water (ZnO/EG-W) nanofluid in a circular pipe were investigated experimentally where the mass fraction of nanoparticles in the base fluid is from 0 to 5 wt.% and at operating temperatures. Different ZnO/EG-W mass concentration nanofluids were prepared, and the physical and thermal transport properties including density, thermal conductivity, specific heat capacity and viscosity were measured and the results were compared with the base fluid. It was found that the nanofluid has maximum of 30% higher heat transfer coefficient compared to base fluid at mass fraction of 2.5 wt.%, whereas at higher values of the nanoparticles' mass concentration of 5 wt.%, the heat transfer coefficient decreases. There is an optimal value of the concentration for the nanoparticles to have the maximal enhancement of the heat transfer. The measurements also showed that the pressure drop of nanofluid was higher than that of the base fluid in a turbulent flow regime. However, there was no significant increase in pressure drop at laminar flow. Our results demonstrated that the ZnO/EG-W nanofluid might be a promising alternative for conventional coolants.

Thermal conductivity and dielectric characteristics of transformer oil filled with bn and Fe<sub>3</sub>O<sub>4</sub> nanoparticles

The purpose of this paper is to investigate the influence of different types of nanoparticles on thermal and dielectric properties along with the relation between them. Boron nitride (BN) nanoparticles with high thermal conductivity and ferriferrous oxide (Fe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> ) nanoparticles as a typical magnetic oxide were dispersed into transformer oil to form different types of nanooil. Thermal and dielectric properties of the nanooil with different mass fractions were measured. Thermal conductivity and thermal diffusivity under different temperature were measured for each type of the nanooil in order to investigate the effect of nanoparticles on thermal property. Dielectric property experiments were performed in accordance with IEC standard. Relative permittivity, dissipation factor and electrical resistivity tests for the nanooil were conducted along with ac and dc breakdown strength in a range of temperature. It is found that both types of the nanooil showed improved thermal property compared with non-modified oil. The nanooil exhibits different performance in dielectric property due to the different properties of the nanoparticles. The obtained results show significant improvement in heat transfer process with increasing the mass fraction of BN nanoparticles while the oil modified by Fe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> nanoparticles shows considerable enhancement in dielectric breakdown strength. Through further comparison between the two types of nanooil, it is proposed that the improved thermal property contributes to the enhancement of the breakdown strength.

Thermophysical and natural convection characteristics of ethylene glycol and water mixture based ZnO nanofluids

Stabilized nanofluids have been prepared by dispersing dry ZnO nanoparticles in different base fluids including 75:25, 85:15 and 95:5 (by volume) of ethylene glycol (EG) and deionized water (DW) mixtures. Thermal conductivity and viscosity experiments have been conducted at temperatures between 15°C and 55°C with mass fraction of nanoparticle of 5.25%. What’s more, natural convection characteristics of EG/DW based ZnO nanofluids were also investigated. The thermal conductivity of nanofluid with more DW is bigger because the network of direct and tight connection in spatial structures between atoms expedites heat transfer between nanoparticles, and it increases with increasing the temperature as expected. Meanwhile, the viscosity of nanofluid increases with increasing the concentration of EG. When the temperature increases, the intermolecular distance becomes larger, which leads to the decrease of the viscosity. Natural convection experiment shows that the presence of nanoparticles deteriorates the natural convective heat transfer under present condition.

Thermal Properties of Phase Change Composites Containing Ferric Oxide Nanoparticles.

We prepared a series of homogeneous nanocomposites by suspending Fe2O3 nanoparticles into paraffin wax (PW) matrix. Fe2O3/PW nanocomposites have reduced both solid-solid phase change latent heat capacity (Ls-s) and solid-liquid phase change latent heat capacity (Ls-l) with an increase in the mass fraction of Fe2O3 nanoparticles. There is almost equable solid-solid phase change temperature (Ts-s) between PW and Fe2O3/PW composites, as well as melting temperature (Ts-l). Fe2O3 nanoparticle addition leads to substantial enhancement in the thermal conductivity of Fe2O3/PW and the enhancement ratio increases with the nanoparticle loading. Thermal conductivity of Fe2O3/PW composite with 3.0 wt% nanoparticles is about 0.27 W/(m · K) at 15 °C, which close to that of γ-Al2O3/PW with 5.0 wt% nanoparticles but higher than that of ZnO/PW containing 5.0 wt% nanoparticles. At 60 °C, Fe2O3/PW has higher thermal conductivity than γ-A12O3/PW and ZnO/PW contained with same fraction of nanoparticles.

Study on Dispersion and Rheology of Particles in Water-Based Nano TiN Fluid

The water-based nanoTiN fluids were prepared by nanoTiN particles, dispersion medium and dispersant using a two-step method. The dispersion and rheology of nanoparticles in water-based fluid were studied under different preparation conditions. The dispersion and rheology of prepared nanoTiN fluids were evaluated and analyzed from the mass fraction of nanoparticles, mass fraction of dispersant and type of dispersion medium respectively by using the analysis of sedimentation stability and rheological properties. The results show that the above-mentioned factors all have different degree of influence on nanofluids’ dispersion and rheology. The viscosity of nanofluids increases with mass fraction of nanoparticles. A balance amount of mass fraction of dispersant will improve nanofluids’ dispersity and fluidity. The dispersion effect of deionized water is the best when the nanoparticles dispersed in different dispersion medium.

Transmission Performance of Water-Based Nano Fluid Based on Computational Fluid Dynamics

The nanoboron carbide particle size is 60nm, dispersed in RO reverse osmosis membrane treatment water form water-based nanofluid by adding the dispersant. In experiment, Water-based nanoboron carbide fluid has good resistance sedimentation stability when adding sodium carboxymethyl cellulose as a dispersing agent. Prepared three kinds of water-based nanoboron carbide fluid, the mass fraction of nanoparticles is 0.6%, 0.8%, 1.0%. By establishing a model of U-shaped tube, simulated the water-based nanofluids flow field in U-shaped tube using FLUENT, get velocity flow lines picture and pressure variation graph by CFD post-processing. From simulation results obtained: Water-based nanoboron carbide has good transmission fluid performance when nanoparticles mass fraction of 0.8%.

Improvement of CO2 absorption using AL2O3 nanofluids in a stirred thermostatic reactor

The improvement of CO2 absorption by Al2O3 nanofluids with deionized water as the base fluid was studied experimentally. The reactor used was a stirred thermostatic reactor, operated batchwise. Pure CO2 was employed in all the experiments. The content of Al2O3 in nanofluids ranged from 0 to 0.2 % (wt). Sodium dodecyl benzene sulfonate (SDBS) was employed to improve the stability of the nanofluids, and the combined effect of nanoparticles and surfactants on the absorption enhancement was studied. The parameters such as the concentration of Al2O3 nanoparticles and surfactants, the stirring speed, and the ultrasonic time were varied. The results show that the nanoparticle mass fraction and the ultrasonic time have an optimum value for the CO2 absorption enhancement. The combination of surfactants and nanoparticles improves the enhancement performance of Al2O3 nanofluids more effectively than that without surfactants. With the increase of the stirring speed, the effective absorption ratio in stable nanofluids declines, while in poorly dispersed Al2O3 suspensions, it is increased first and then reduced. The mechanism of the Al2O3 nanofluid enhancing CO2 absorption is discussed accordingly. The absorption enhancement by the Al2O3 nanofluid is mainly attributable to convective motion induced by the Brownian motion.

Experimental investigation of the specific heat of a nitrate–alumina nanofluid for solar thermal energy storage systems

We measured the change in specific heat of nitrate salt–alumina nanoparticle nanofluids at low nanoparticle concentration (less than 2% by mass) to understand how adding small amounts of nanoparticles affected this property. Alumina nanoparticles were dispersed in a eutectic of sodium nitrate and potassium nitrate (60:40 mole fraction) to create nanofluids using a two-step method. Neutron activation analysis was used to measure the actual mass fraction of the alumina nanoparticles in the nanofluids. The nominal mass fraction was always larger than the actual mass fraction, with differences up to 41%. The specific heat was measured using a modulated differential scanning calorimeter (MDSC). The results showed that there exists a parabolic relation between specific heat and mass fraction of alumina nanoparticles (maximum 30.6% enhancement at 0.78% actual mass fraction of alumina nanoparticles). The measurement uncertainty for the specific heat values was less than 4%. The stability of the specific heat values of the nanofluids was also examined; we found the nanoparticle concentration with the highest specific heat value shifted from 0.78% to 0.3% when the same samples were tested after one and two months.

Preparation and Application of LDPE/ZnO Nanocomposites for Extending Shelf Life of Fresh Strawberries.

Strawberries have a very short post-harvest life mostly due to their relatively high water content, intense metabolic activity and susceptibility to microbial rot. Antimicrobial low-density polyethylene nanocomposite films containing ZnO nanoparticles at different mass fractions were prepared by melt mixing and followed by compression moulding using a hot press machine. Fresh strawberries were packed in nanocomposite films and stored at 4 °C. Their microbial stability, ascorbic acid content and titratable acidity were evaluated after 0, 4, 8, 12 and 16 days of storage. Microbial growth rate was significantly reduced up to 16 days as a result of the use of nanocomposite packaging material containing ZnO nanoparticles. By increasing the ZnO nanoparticle mass fraction to 5%, the antimicrobial activity of the film increased. All packages containing the ZnO nanoparticles kept the microbial load of fresh strawberries below the level that affects shelf life (5 log CFU/g) up to 16 days. The lowest degradation of ascorbic acid content (6.55 mg per 100 g), and loss of acidity (0.68%) were observed in packages containing 3% of ZnO nanoparticles with 10% polyethylene-grafted maleic anhydride.

Impact of Fe3O4 nanoparticles on asphaltene precipitation during CO2 injection

Precipitation of asphaltene may occur during injecting CO2 into oil reservoirs for enhanced oil recovery (EOR). A potential means of combating such occurrence is to simultaneously inject metal oxide nanoparticles along with the CO2 stream. The present experimental study investigates the impact of Fe3O4 nanoparticles on the precipitation of asphaltene using interfacial tension (IFT) and Bond number measurements. The variation of the latter versus pressure was found to better characterize the onset and intensity of asphaltene precipitation than that of IFT. This is because both changes in IFT and shape of the pendant drop due to gravity force are more rigorously captured by the Bond number. Two different types of asphaltenes were present in the synthesized solution of n-heptane and toluene. Various mass fractions of Fe3O4 nanoparticles were also used at different temperatures of 50 and 70 °C. The experimental results show that the higher the mass fraction of Fe3O4 nanoparticles is, the lower would be the intensity of the asphaltene precipitation for the attempted mass fractions. The characteristics of asphaltene in terms of structure were also found to have profound impact on the performance of nanoparticles.

Surface charge and dc flashover characteristics of direct-fluorinated SiR/SiO&lt;sub&gt;2&lt;/sub&gt; nanocomposites

Silicone rubber (SiR), as a basic insulating material, is widely used in insulators for HVDC transmission lines. Incorporation of nanoparticles could not only improve the insulating properties, but also alter surface charge behavior as a consequence. In HVDC transmission lines, corona discharge could even occur on well-designed insulators, which can inject charge into the insulator surface and influence dc flashover voltage. Direct fluorination is a method to change the surface chemical component of polymers, which could induce the corresponding changes in electrical properties of the surface layer, thus influencing surface charge behavior and dc flashover voltage. This paper tries to study the effects of fluorination time and mass fraction of nanoparticles on surface charge behavior and dc flashover voltage of SiR/SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> nanocomposites. Samples were prepared by dispersing nano-SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> into SiR matrix with the fraction of 0, 1, 3 and 5 wt% respectively. Then the direct fluorination of the samples were conducted in a stainless reaction vessel at 25 °C using a F <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /N <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> mixture gas with 12% F <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> by volume at 0.05 MPa for 5, 10, 15 and 20 minutes. After corona discharge tests performed at room temperature with a relative humidity of ~ 40%, the decay curves of the surface potential were measured using an electrostatic voltmeter, and flashover tests were carried out under dc stress, of which the polarity was identical with the corona discharge. Obtained results show that the dc flashover voltage is affected by the surface charge, which varies with the fluorination time and mass fraction of nanoparticles. It is indicated that the direct fluorination can markedly improve the decay rate of surface charge, and raise the dc flashover voltage of SiR/SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> nanocomposites.

Experimental verification of nanoparticle jet minimum quantity lubrication effectiveness in grinding

In our experiment, K-P36 precision numerical control surface grinder was used for dry grinding, minimum quantity lubrication (MQL) grinding, nanoparticle jet MQL grinding, and traditional flood grinding of hardened 45 steel. A three-dimensional dynamometer was used to measure grinding force in the experiment. In this research, experiments were conducted to measure and calculate specific tangential grinding force, frictional coefficient, and specific grinding energy, thus verifying the lubrication performance of nanoparticles in surface grinding. Findings present that compared with dry grinding, the specific tangential grinding force of MQL grinding, nanoparticle jet MQL grinding, and flood grinding decreased by 45.88, 62.34, and 69.33 %, respectively. Their frictional coefficient was reduced by 11.22, 29.21, and 32.18 %, and the specific grinding energy declined by 45.89, 62.34, and 69.45 %, respectively. Nanoparticle jet MQL presented ideal lubrication effectiveness, which was attributed to the friction oil film with strong antifriction and anti-wear features formed by nanoparticles on the grinding wheel/workpiece interface. Moreover, lubricating properties of nanoparticles of the same size (50 nm) but different types were verified through experimentation. In our experiment, ZrO2 nanoparticles, polycrystal diamond (PCD) nanoparticles, and MoS2 nanoparticles were used in the comparison of nanoparticle jet MQL grinding. The experimental results manifest that MoS2 nanoparticles exhibited the optimal lubricating effectiveness, followed by PCD nanoparticles. Our research also integrated the properties of different nanoparticles to analyze the lubrication mechanisms of different nanoparticles. The experiment further verified the impact of nanoparticle concentration on the effectiveness of nanoparticle jet MQL in grinding. The experimental results demonstrate that when the nanoparticle mass fraction was 6 %, the minimum specific tangential grinding force, frictional coefficient, and specific grinding energy were 1.285 N/mm, 0.382, and 57.825 J/mm3, respectively. When nanoparticle mass fraction was smaller than 6 %, lubrication effects of nanoparticle jet MQL increased with the rising nanoparticle mass fraction. When nanoparticle mass fraction was larger than 6 %, lubrication effects of nanoparticle jet MQL decreased with the rising nanoparticle mass fraction.

Experimental investigation on thermal and rheological properties of n-octadecane with dispersed TiO2 nanoparticles

In the present study, titanium (IV) oxide (TiO2) nanoparticles were dispersed in n-octadecane to fabricate phase change material (PCM) with enhanced properties and behavior. Thermal conductivity (TC) and viscosity of n-octadecane/TiO2 dispersions were experimentally investigated using transient plane source (TPS) technique and rotating coaxial cylindrical viscometer, respectively. The results showed that the TC of n-octadecane/TiO2 dispersion depends on temperature and nanoparticle loading. A non-monotonic behavior of TC enhancement in both solid and liquid phases was observed. In solid phase, the maximum TC enhancement occurred at 3wt.% of nanoparticles. When the nanoparticle mass fraction was over 4% in liquid phase, the TC started to decrease. The rheological behavior of the n-octadecane/TiO2 samples indicated that dispersions with low nanoparticle mass fractions demonstrate Newtonian behavior, and for higher mass factions the shear-thinning behavior was observed. Shear stress vs. shear rate curves showed that the liquid phase of PCM behaves like a Bingham plastic fluid for mass fraction greater than 1%. As expected, the effective viscosity could be influenced by temperature. At the shear rate of 48.92s−1 for 3wt.% nanoparticles, the effective viscosity decreased by 26.8% while temperature increased from 35°C to 55°C. For the investigated n-octadecane/TiO2 dispersions, new thermophysical correlations are proposed for predicting TC and rheological properties.