Dynamics of liquid meniscus bridge of a vibrating disk

Consideration of flow rheology

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A modified Reynolds equation, which includes the effect of flow rheology, is derived to describe the flow behaviour of lubricant between the space of a magnetic head slider and a disk. Under the assumptions of a small vibration of the spacing, and zero contact angle of the liquid-solid interface, the dynamics of a liquid meniscus disk of finite radius is analysed. The time-dependent modified Reynolds equation is linearised, and solved, under the boundary condition considering Laplace pressure. The results show that the pressure and load carrying capacity consist of three terms, that is, the static meniscus force term, the spring term by the dynamic Laplace pressure, and time-dependent damping term by the flow rheology of the fluid. The flow rheology affects the static meniscus forces and the damping forces significantly as compared to the spring forces. The effects of flow rheology on the load carrying capacity are also discussed.

Original languageEnglish
Pages (from-to)44-47
Number of pages4
JournalMicro and Nano Letters
Volume4
Issue number1
DOIs
Publication statusPublished - 2009 Apr 3

Fingerprint

menisci
Rheology
rheology
Reynolds equation
Liquids
load carrying capacity
Load limits
liquids
Damping
Magnetic heads
damping
Contact angle
Lubricants
liquid-solid interfaces
lubricants
chutes
Boundary conditions
Fluids
spacing
boundary conditions

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Bioengineering
  • Biomedical Engineering

Cite this

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title = "Dynamics of liquid meniscus bridge of a vibrating disk: Consideration of flow rheology",
abstract = "A modified Reynolds equation, which includes the effect of flow rheology, is derived to describe the flow behaviour of lubricant between the space of a magnetic head slider and a disk. Under the assumptions of a small vibration of the spacing, and zero contact angle of the liquid-solid interface, the dynamics of a liquid meniscus disk of finite radius is analysed. The time-dependent modified Reynolds equation is linearised, and solved, under the boundary condition considering Laplace pressure. The results show that the pressure and load carrying capacity consist of three terms, that is, the static meniscus force term, the spring term by the dynamic Laplace pressure, and time-dependent damping term by the flow rheology of the fluid. The flow rheology affects the static meniscus forces and the damping forces significantly as compared to the spring forces. The effects of flow rheology on the load carrying capacity are also discussed.",
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Dynamics of liquid meniscus bridge of a vibrating disk : Consideration of flow rheology. / Li, Wang-Long.

In: Micro and Nano Letters, Vol. 4, No. 1, 03.04.2009, p. 44-47.

Research output: Contribution to journalArticle

TY - JOUR

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