The effect of temperature and solid concentration on dynamic viscosity of MWCNT/MgO (20–80)–SAE50 hybrid nano-lubricant and proposing a new correlation: An experimental study

Asadi, Amin; Asadi, Meisam; Rezaei, Mohammadhosein; Siahmargoi, Marzieh; Asadi, Fahime

doi:10.1016/j.icheatmasstransfer.2016.08.021

Cited by 144 publications

(40 citation statements)

References 37 publications

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“…Consequently, the resistance against particle motion is created between the fluid layers [40]. A similar trend was also observed by Asadi et al 2016 [41], where viscosity improvement of up to 125 cSt was obtained by adding 0.25 % of MWCNT/ MgO particles that has been measured at 40 °C. On the other hand, Chen et al [42] proposed that by adding magnetite particles into the silicon oil, the viscosity enhanced up to 55 cSt at the temperature measurement of 40 °C.…”

Section: Methodssupporting

confidence: 80%

Application of Silica–Coated Magnetite on a Steel Plate and its Frictional and Thermal Effect

Dayana

Tetuko

Sembiring

et al. 2020

Period. Polytech. Mech. Eng.

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The magnetite (Fe3O4) particles that have been coated using tetraethyl orthosilicate (TEOS) as silica precursors were used as the additive in the lubricant. The effects of silica-coated magnetite additive on the thermal properties of ferro-lubricant and reducing the friction on a steel plate have been investigated. The characterizations were conducted at both conditions: with and without the addition of Fe3O4 particles. The characterization using TEM proposed that the average particle size of the silica-coated magnetite particles is 150 nm. The TGA/DSC curves of the silica-coated magnetite particles suggested a gradual weight loss obtained as the temperature increased. The endothermic peak was obtained at ~37 and 50 °C. The silica-coated magnetite particles’ additive increases both the density and viscosity of 0.84 g/cm3 and 134.29 cSt. The silica-coated magnetite particles additive in the lubricant enhances the thermal conductivity and specific heat of 0.151 W/m.K and 1600 J/kg.K. Ferro-lubricant reduces the friction coefficient up to 0.02 (static) and 0.005 (dynamic). The wear resistance of the plate could be improved as analyzed using an optical microscope. These results demonstrate a promising application of the silica-coated magnetite particles as an additive in the lubricant. Therefore improving wear resistance and cooling during the friction process.

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Section: Methodssupporting

confidence: 80%

Application of Silica–Coated Magnetite on a Steel Plate and its Frictional and Thermal Effect

Dayana

Tetuko

Sembiring

et al. 2020

Period. Polytech. Mech. Eng.

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“…Hence, 6 hours of ultrasonication were done and finally, MgO-SWCNT hybrid nanofluids showed three days of stability. Similarly, 80% MgO was suspended into the motor oil (SAE 40) with 20% multi-walled carbon nanotube (MWCNT) Asadi et al, [54]. The MgO-MWCNT/ SAE 40 hybrid nanofluids showed stability for over two weeks while 2 hours of stirring and 1 hour of sonication was conducted to achieve stability.…”

Section: Mgo-based Hybrid Nanofluidsmentioning

confidence: 99%

Preparation Methods and Challenges of Hybrid Nanofluids: A Review

Urmi

Shafiqah

Rahman

et al. 2020

ARFMTS

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The recent studies on nanotechnology have reported rapid development of nanofluids in various aspects due to the enhanced thermophysical and heat transfer properties of nanofluids. This paper reviews the preparation methods and some challenging issues of hybrid nanofluids during the Preparation of hybrid nanofluids. One-step and two-step are mainly the preparation methods of hybrid nanofluids. Compared to the one-step method, the two-step method is a widely used technique for preparing nanofluids due to its simplicity, whereas this technique has a complexity of achieving stability of hybrid nanofluids. On the contrary, the one-step is very flexible for achieving uniformity of nanofluids with comparatively high production cost. Some researchers followed various techniques such as surfactant addition, surface treatment, and pH modification for preparing a durable nanofluid. However, these methods also have their limitation, such as degrading the thermal attributes of hybrid nanofluids. So, future studies need to address these challenges along with the cost analysis during preparing the hybrid nanofluids.

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“…Similarly, the exact solution of Maxwell nanofluid containing CNTs in four types of base fluid was investigated in [19]. Asadi et al [20][21][22][23] conducted some experimental study on the dynamic viscosity of different nanofluids. They found that the viscosity of MWCNTs nanofluids is considerably higher than that of the base fluids.…”

Section: Literature Reviewmentioning

confidence: 99%

MHD Thin Film Flow and Thermal Analysis of Blood with CNTs Nanofluid

et al. 2019

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Our main objective in the present work is to elaborate the characteristics of heat transport and magneto-hydrodynamics (MHD) finite film flow of human blood with Carbon Nanotubes (CNTs) nanofluids over a stretchable upright cylinder. Two kinds of CNTs nanoparticles, namely (i) SWCNTs (single walled carbon nanotubes) and (ii) MWCNTs (multi walled carbon nanotubes), are used with human blood as a base liquid. In addition, a uniform magnetic field (B) has been conducted perpendicularly to the motion of nanoliquid. The transformation of the partial differential structure into a non-linear ordinary differential structure is made by using appropriate dimensionless quantities. The controlling approach of the Homotopy analysis method (HAM) has been executed for the result of the velocity and temperature. The thickness of the coating film has been kept variable. The pressure distribution under the variable thickness of the liquid film has been calculated. The impacts of different variables and rate of spray during coating have been graphically plotted. The coefficient of skin friction and Nusselt number have been presented numerically. In addition, it is noticed that the thermal field of a nanoliquid elevates with rising values of ϕ and this increase is more in SWCNTs nanofluid than MWCNTs nanofluid.

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The effect of temperature and solid concentration on dynamic viscosity of MWCNT/MgO (20–80)–SAE50 hybrid nano-lubricant and proposing a new correlation: An experimental study

Cited by 144 publications

References 37 publications

Application of Silica–Coated Magnetite on a Steel Plate and its Frictional and Thermal Effect

Application of Silica–Coated Magnetite on a Steel Plate and its Frictional and Thermal Effect

Preparation Methods and Challenges of Hybrid Nanofluids: A Review

MHD Thin Film Flow and Thermal Analysis of Blood with CNTs Nanofluid

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