Molecular dynamics study on the adsorption synergy of MWCNTs/MoS2 nanofluids and its influence of internal-cooling grinding surface integrity

Peng, Ruitao; Tong, Jiawei; Zhao, Linfeng; Tang, Xi; Peng, Xingyue; He, Xiangbo

doi:10.1016/j.apsusc.2021.150312

Cited by 21 publications

(1 citation statement)

References 59 publications

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“…In assessing the heat transfer characteristics of a cooling system, MWCNTs/nanofluids have shown a significant enhancement in the measured thermophysical properties such as thermal conductivity since CNTs possess almost 5 times higher value than other conventional materials 17 . Consequently, the higher thermal conductivity of MWCNTs/nanofluid ensures a better heat transfer rate in the applied system 18 .…”

Section: Introductionmentioning

confidence: 99%

Optimizing the heat transfer characteristics of MWCNTs and TiO2 water-based nanofluids through a novel designed pilot-scale setup

Javadpour

Heris

Mohammadfam

et al. 2022

Sci Rep

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This study aimed to investigate the effect of titanium dioxide (TiO2) nano additives on the thermal performance of a pilot-scale cross-flow cooling tower. Moreover, it is a continuation of our previous study on the effect of using multi-walled carbon nanotubes (MWCNTs) nanofluid, and the results were compared with the results of TiO2 and previous work. An experimental design by response surface methodology (RSM) based on central composite design (CCD) with two factors (concentration and flow rate) was used to study the effectiveness of the setup, Merkel number, and the cooling range. The nanofluids were prepared by the two-step method. The stability tests were performed considering different surfactants such as Gum Arabic, Triton X-100, and sodium dodecyl sulfate, and Gum Arabic was determined as the optimal surfactant. The visual method, dynamic light scattering (DLS), and Zeta potential analyses were used to ensure the stability of the nanofluids and determine the size distribution of the nanoparticles in the nanofluids. The findings revealed that the heat transfer characteristics of the working fluid were improved with the addition of nanoparticles. Moreover, by comparing the effect of nanoparticles, it was found that MWCNTs could enhance the thermal features better than TiO2. The nanofluid containing 0.085 wt% of the MWCNTs improves the Merkel number, effectiveness, and cooling range by 28, 10.2, and 15.8%, respectively, whereas these values for TiO2 containing nanofluids are 5, 4.1, and 7.4%, respectively. MWCNTs nanofluid with a concentration of 0.069 wt% and a flow rate of 2.092 kg/min was proposed for optimal system setup. Under these conditions, the cooling range, effectiveness, and Merkel number were about 23.5, 55.75%, and 0.64, respectively.

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Section: Introductionmentioning

confidence: 99%

Optimizing the heat transfer characteristics of MWCNTs and TiO2 water-based nanofluids through a novel designed pilot-scale setup

Javadpour

Heris

Mohammadfam

et al. 2022

Sci Rep

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Improving the high temperature tribology of polyimide by molecular structure design and grafting POSS

Yin

Song

Zhao

et al. 2021

Polymers for Advanced Techs

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In this paper, the method of enhancing glass transition temperature of polyimide (PI) composite for ultrasonic motor was employed from the three aspects by molecular dynamics simulation. First, polyimide with different molecular stiffness was designed and their mechanical and thermal properties were calculated after optimization. The simulated results showed that polyimide with stronger stiffness had higher glass transition temperature (Tg), higher Young's modulus and shear modulus. Besides, PI composite was designed by filling different proportional polyhedral oligomeric silsesquioxane (POSS) to improve the thermostability continuously. Simulated results showed that the glass transition temperature of PI composites increased with an increase of POSS content. The third method was filling grafted POSS (POSS‐PI) with PI molecular into PI matrix to improve the compatibility. It was found that the thermal properties were slightly improved compared with PI filled with single POSS. PI composite with 9% POSS‐PI2 had the highest glass transition temperature. More importantly, the friction coefficient and the temperature rise on the friction interface were calculated and the result showed that the friction coefficient decreased with the increase of environment temperature. Finally, the improvement mechanism of grafted POSS was analyzed by extracting the energy of intermolecular interaction, mean square displacement, atomic relative concentration and velocity.

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Characteristics of high-shear and low-pressure grinding for Inconel718 alloy with a novel super elastic composite abrasive tool

Tian

Han

et al. 2022

Int J Adv Manuf Technol

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Molecular dynamics study on the adsorption synergy of MWCNTs/MoS2 nanofluids and its influence of internal-cooling grinding surface integrity

Cited by 21 publications

References 59 publications

Optimizing the heat transfer characteristics of MWCNTs and TiO2 water-based nanofluids through a novel designed pilot-scale setup

Optimizing the heat transfer characteristics of MWCNTs and TiO2 water-based nanofluids through a novel designed pilot-scale setup

Improving the high temperature tribology of polyimide by molecular structure design and grafting POSS

Characteristics of high-shear and low-pressure grinding for Inconel718 alloy with a novel super elastic composite abrasive tool

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