Abstract

Dynamic stiffness and damping coefficients of a finite journal bearing operating on TiO2 based nanolubricant are obtained using the linear perturbation approach. Time dependent version of governing Reynolds equation is modified to consider the couple stress effect of TiO2 nanoparticle lubricant additives. The viscosity variation of lubricant with varying concentrations of nanoparticle additives is simulated using a modified Krieger-Dougherty model. The modified Reynolds equation is solved using linear perturbation approach to obtain the dynamic pressures and dynamic coefficients. Threshold stability maps are plotted depicting stable operating regions of journal bearing operating on TiO2 nanolubricants. Results reveal an increase in stiffness and damping coefficients, and a corresponding improvement in whirl instability characteristics of journal bearings, with increase in TiO2 nanoparticle concentration.

Original languageEnglish
Pages (from-to)963-976
Number of pages14
JournalPertanika Journal of Science and Technology
Volume25
Issue number3
Publication statusPublished - 01-07-2017

Fingerprint

Journal bearings
nanoparticles
Nanoparticles
Lubricants
lubricants
Reynolds equation
lubricant
damping
stiffness
Damping
Stiffness
whirl
perturbation
Viscosity
viscosity
Pressure
nanoparticle
additive

All Science Journal Classification (ASJC) codes

  • Computer Science(all)
  • Chemical Engineering(all)
  • Environmental Science(all)
  • Agricultural and Biological Sciences(all)

Cite this

@article{fc50c6038d604f6ba10186177f0a2cfd,
title = "Dynamic performance characteristics of finite journal bearings operating on TiO2 based nanolubricants",
abstract = "Dynamic stiffness and damping coefficients of a finite journal bearing operating on TiO2 based nanolubricant are obtained using the linear perturbation approach. Time dependent version of governing Reynolds equation is modified to consider the couple stress effect of TiO2 nanoparticle lubricant additives. The viscosity variation of lubricant with varying concentrations of nanoparticle additives is simulated using a modified Krieger-Dougherty model. The modified Reynolds equation is solved using linear perturbation approach to obtain the dynamic pressures and dynamic coefficients. Threshold stability maps are plotted depicting stable operating regions of journal bearing operating on TiO2 nanolubricants. Results reveal an increase in stiffness and damping coefficients, and a corresponding improvement in whirl instability characteristics of journal bearings, with increase in TiO2 nanoparticle concentration.",
author = "Binu, {K. G.} and K. Yathish and Shenoy, {B. S.} and Rao, {D. S.} and R. Pai",
year = "2017",
month = "7",
day = "1",
language = "English",
volume = "25",
pages = "963--976",
journal = "Pertanika Journal of Science and Technology",
issn = "0128-7680",
publisher = "Universiti Putra Malaysia",
number = "3",

}

Dynamic performance characteristics of finite journal bearings operating on TiO2 based nanolubricants. / Binu, K. G.; Yathish, K.; Shenoy, B. S.; Rao, D. S.; Pai, R.

In: Pertanika Journal of Science and Technology, Vol. 25, No. 3, 01.07.2017, p. 963-976.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dynamic performance characteristics of finite journal bearings operating on TiO2 based nanolubricants

AU - Binu, K. G.

AU - Yathish, K.

AU - Shenoy, B. S.

AU - Rao, D. S.

AU - Pai, R.

PY - 2017/7/1

Y1 - 2017/7/1

N2 - Dynamic stiffness and damping coefficients of a finite journal bearing operating on TiO2 based nanolubricant are obtained using the linear perturbation approach. Time dependent version of governing Reynolds equation is modified to consider the couple stress effect of TiO2 nanoparticle lubricant additives. The viscosity variation of lubricant with varying concentrations of nanoparticle additives is simulated using a modified Krieger-Dougherty model. The modified Reynolds equation is solved using linear perturbation approach to obtain the dynamic pressures and dynamic coefficients. Threshold stability maps are plotted depicting stable operating regions of journal bearing operating on TiO2 nanolubricants. Results reveal an increase in stiffness and damping coefficients, and a corresponding improvement in whirl instability characteristics of journal bearings, with increase in TiO2 nanoparticle concentration.

AB - Dynamic stiffness and damping coefficients of a finite journal bearing operating on TiO2 based nanolubricant are obtained using the linear perturbation approach. Time dependent version of governing Reynolds equation is modified to consider the couple stress effect of TiO2 nanoparticle lubricant additives. The viscosity variation of lubricant with varying concentrations of nanoparticle additives is simulated using a modified Krieger-Dougherty model. The modified Reynolds equation is solved using linear perturbation approach to obtain the dynamic pressures and dynamic coefficients. Threshold stability maps are plotted depicting stable operating regions of journal bearing operating on TiO2 nanolubricants. Results reveal an increase in stiffness and damping coefficients, and a corresponding improvement in whirl instability characteristics of journal bearings, with increase in TiO2 nanoparticle concentration.

UR - http://www.scopus.com/inward/record.url?scp=85021119666&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85021119666&partnerID=8YFLogxK

M3 - Article

VL - 25

SP - 963

EP - 976

JO - Pertanika Journal of Science and Technology

JF - Pertanika Journal of Science and Technology

SN - 0128-7680

IS - 3

ER -