Author
Jaw-Ren Lin
Bio: Jaw-Ren Lin is an academic researcher from Taoyuan Innovation Institute of Technology. The author has contributed to research in topics: Non-Newtonian fluid & Reynolds equation. The author has an hindex of 18, co-authored 74 publications receiving 857 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a theoretical analysis of hydrodynamic squeeze film behavior for long partial journal bearings lubricated by fluids with couple stresses is presented, and the modified Reynolds equation governing the film pressure is derived by using the Stokes constitutive equations.
73 citations
TL;DR: In this article, the combined effects of couple stress due to a Newtonian lubricant blended with additives and the presence of roughness on journal bearing surfaces are studied, and the Stokes theory and Christensen's stochastic generalized Reynolds equation is deduced.
63 citations
TL;DR: In this article, a theoretical study of the combined effects of non-Newtonian couple-stress lubricants and variation of viscosity with pressure in the squeeze-film motion between a sphere and a flat plate is presented.
39 citations
TL;DR: In this article, a modified Reynolds equation is derived by applying the Shliomis ferrohydrodynamic model incorporating the Stokes microcontinuum theory for parallel circular squeeze film disks with non-Newtonian ferrofluid in the presence of transverse magnetic fields.
35 citations
TL;DR: In this paper, the combined influences of couple stresses and surface roughness on the lubrication performance of journal bearing systems were theoretically predicted, and the generalized stochastic non-Newtonian Reynolds type equation was derived.
Abstract: According to the Stokes microcontinuum theorem and Christensen's stochastic model, the main objective of this paper is to theoretically predict the combined influences of couple stresses and surface roughness on the lubrication performance of journal‐bearing systems. To take account of the presence of both the surface roughness of bearings and the couple stress effect due to the lubricant containing the polar suspensions, the generalized stochastic non‐Newtonian Reynolds‐type equation is derived. Compared to the Newtonian‐lubricant smooth‐bearing case, the couple stress effects and the longitudinal roughness improve the load carrying capacity, and thus decrease the attitude angle and friction parameter, while the effect of transverse roughness is opposite to that of the longitudinal one in the journal‐bearing system.
34 citations
Cited by
More filters
TL;DR: A summary of recent advances in established and emerging applications of ferrofluids, including applications in optics, sensors, actuators, seals, lubrication, and static/dynamic magnetically driven assembly of structures is provided.
Abstract: Ferrofluids are suspensions of magnetic nanoparticles that have the attractive feature of being controlled by applied magnetic fields. Ferrofluids have been studied for decades in an ever growing number of applications that take advantage of their response to applied magnetic fields. Here, we provide a summary of recent advances in established and emerging applications of ferrofluids, including applications in optics, sensors, actuators, seals, lubrication, and static/dynamic magnetically driven assembly of structures.
260 citations
TL;DR: In this article, the authors present a review of the current efforts on in vitro synthesis of a variety of magnetic nanoparticles using bioinspired approaches by utilizing mineralization proteins from magnetotactic bacteria, and survey biomimetic strategies for the rational synthesis of various magnetic nanomaterials under ambient conditions.
Abstract: Magnetotactic bacteria, known to produce magnetic nanocrystals with uniform shapes and sizes at physiological conditions, serve as an inspiration and source of a number of biological macromolecules used for the biomimetic synthesis of a variety of magnetic nanomaterials. This review discusses the current state of understanding of magnetosome biomineralization in magnetotactic bacteria, as well as the ways in which iron biomineralization processes can be utilized for tailored in vivo formation of complex magnetic nanomaterials, not occurring in magnetotactic bacteria naturally. The review assesses the current efforts on in vitro synthesis of a variety of magnetic nanoparticles using bioinspired approaches by utilizing mineralization proteins from magnetotactic bacteria, and surveys biomimetic strategies for the rational synthesis of various magnetic nanomaterials under ambient conditions. Finally, this review presents magnetic characterization of nanoparticles, highlighting differences in magnetic behavior between magnetic nanoparticles produced using bioinspired in vivo and in vitro strategies, compared to those produced using conventional methods. This in turn impacts their utility in a wide range of applications for magnetic nanoparticles, which are examined in detail, where bioinspired synthesis methods have potentially provided added advantages.
123 citations
TL;DR: In this article, the behavior of traction coefficient in line-contact EHL with provision for surface roughness is studied and a method for its prediction is presented, where the statistical elasto-plastic asperity contact model is utilized to determine the traction coefficient with consideration of the free volume properties of the lubricant suitable for a wide range of high pressures and temperatures.
92 citations
TL;DR: In this paper, a theoretical study of squeeze film behavior for a finite journal bearing lubricated with couple stress fluids is presented, and the modified Reynolds equation is obtained by using the Stokes equations of motion to account for the couple stress effects due to the lubricant blended with various additives.
90 citations
TL;DR: In this paper, the effect of CuO, TiO 2 and Nano-Diamond nanoparticles additives in API-SF engine oil, on static characteristics of an externally adjustable fluid-film bearing was evaluated for various simulated operating conditions.
85 citations