Potential of RBD Palm Oil as a Lubricant in Textured Journal Bearing using CFD with Consideration of Cavitation and Conjugate Heat Transfer

Rasep, Zuraidah; Yazid, Muhammad Noor Afiq Witri Muhammad; Samion, Syahrullail; Sidik, Nor Azwadi Che

doi:10.37934/cfdl.14.2.98110

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…Despite their similar viscosities, jatropha oil demonstrated comparable tribological performance to ISO VG46. Rasep et al (2022) delved into numerical investigations of JBs using refined, bleached and deodorized palm oil (RBDPO) as a lubricant. Their findings pointed to optimum operational conditions being achieved at rotational speeds exceeding 800 rpm with an eccentricity ratio ( εtrue) of 0.3.…”

Section: Introductionmentioning

confidence: 99%

Bio-based lubricant with additives: tribological performances in hydrodynamic journal bearing

Norazman,

Paiman,

Samion

et al. 2024

ILT

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Purpose The purpose of this paper is to investigate the performance of bio-based lubricants (BBL), namely, palm mid-olein (PMO) enriched with an antioxidant agent, tertiary-butylhydroquinone (TBHQ) and a viscosity improver, ethylene-vinyl acetate (EVA), in journal bearing (JB) applications. Design/methodology/approach Samples of the BBL were prepared by blending it with TBHQ and EVA at various blending ratios. The oxidative stability (OS) and viscosity of the BBL samples were examined using differential scanning calorimetry and a viscometer, respectively. Meanwhile, their performance in JB applications was evaluated through the use of a JB test rig with a 0.5 length-to-diameter ratio at various operating conditions. Findings It was found that the combination of PMO + TBHQ + EVA demonstrated a superior oil film pressure and load-carrying capacity, resulting in a reduced friction coefficient and a smaller attitude angle compared to the use of only PMO or VG68. However, it was observed that the addition of TBHQ and EVA to the PMO did not have a significant impact on the minimum oil film thickness. Practical implications The results would be quite useful for researchers generally and designers of bearings in particular. Originality/value This study used PMO as the base stock, and its compatibility with TBHQ and EVA was investigated in terms of its OS and viscosity. The performance of this treated BBL was evaluated in a hydrodynamic JB. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-11-2023-0363/

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Section: Introductionmentioning

confidence: 99%

Bio-based lubricant with additives: tribological performances in hydrodynamic journal bearing

Norazman,

Paiman,

Samion

et al. 2024

ILT

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“…Various methods have been proposed by various scientists to improve the performance of journal bearings. The suitable condition of textured journal bearing needs to be chosen correctly to optimize the maximum film pressure of journal bearing load and load-carrying capacity of journal bearing [2]. One of the commonly used methods is to perform surface engineering in the form of providing slip / no-slip boundary conditions and textures on the surface of the journal bearing.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on Hydrodynamic Analysis with and without Cavitation Modelling: A Study on Textured Slip Journal Bearing

Althesa Androva,

Muhammad Tauviqirrahman,

Nazaruddin Sinaga

et al. 2024

CFDL

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In journal bearing modeling, the phenomenon of cavitation is very important to improve the accuracy of the simulation results. This is because cavitation will almost certainly occur because there are convergent and divergent geometries. The results of the simulation will be close to real conditions so that it can have a positive effect on researchers in order to design optimal journal bearings. The effect of modeling without cavitation and with cavitation on journal bearing modeling has a great influence on the lubrication performance of journal bearings. In modeling with cavitation, the maximum hydrodynamic pressure and load carrying capacity that the journal bearing is capable of relying on has a fairly rapid increase. The modeling results also relate to the friction force that occurs in the journal bearing. The aim of the present study is to explore the effect of inclusion of modeling of the Hydrodynamic pressure. The finite volume method based on software is used to compare the result with and without cavitation. Here, The mixture multiphase cavitation is adopted. The numerical result show t he effect of modelling without cavitation and with cavitation on journal bearing modelling has a great influence on the lubrication performance of journal bearings. In modelling with cavitation, the maximum hydrodynamic pressure and load cmarrying capacity that the journal bearing is capable of relying on has a fairly rapid increase. The modelling results also relate to the friction force that occurs in the journal bearing.

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“…In other related studies, contact friction is designed analytically in the involute of gears, as well as the simulation of non-newtonian liquids, CFD applications, DOE design of experiments, and remeshing in deformable systems by finite elements, as also indicated in Ref. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of Elastohydrodynamic Lubrication in Spur Gears

Rafael Ramirez,

Andrés Rodríguez,

Jonathan Fabregas

et al. 2024

CFDL

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An analysis using computational modeling by finite elements of the phenomenon of elastohydrodynamic lubrication (EHL) was carried out for a transmission system of pinion gear in a crankcase with partial filling lubrication. The analysis utilized tribological studies describing the contact behavior characteristics of solid surfaces with the lubrication film caused by dragging and splashing. Furthermore, the characteristics of the Reynolds-Hertz model for this type of phenomena are described, as well as the equations of elastic deformation and elastic displacements along with the geometry of the non-concordant bodies in contact. This was done by modeling the Lagrangian-Eulerian type for non-Newtonian fluid, implementing multiphysics coupling methods. The pressure profile of the lubricant films, the temperature reached by the lubricant, and the von Mises stress at the contact were obtained, showing a good approximation with the related results, indicating a range of 30 MPa to 900 MPa of pressure in the lubricant film and von Mises stress ranging from 30 MPa to 100 MPa in the contact area of the gear tooth.

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Potential of RBD Palm Oil as a Lubricant in Textured Journal Bearing using CFD with Consideration of Cavitation and Conjugate Heat Transfer

Cited by 3 publications

References 18 publications

Bio-based lubricant with additives: tribological performances in hydrodynamic journal bearing

Bio-based lubricant with additives: tribological performances in hydrodynamic journal bearing

A Comparative Study on Hydrodynamic Analysis with and without Cavitation Modelling: A Study on Textured Slip Journal Bearing

Modeling and Simulation of Elastohydrodynamic Lubrication in Spur Gears

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