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Benyebka Bou-Saïd

Bio: Benyebka Bou-Saïd is an academic researcher from University of Lyon. The author has contributed to research in topics: Reynolds equation & Lubrication. The author has an hindex of 18, co-authored 128 publications receiving 1042 citations. Previous affiliations of Benyebka Bou-Saïd include Centre national de la recherche scientifique & Northwestern Polytechnical University.


Papers
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TL;DR: In this paper, the Duan-Rach Approach (DRA) was used to obtain an approximate analytical solution of squeezing unsteady nanofluid flow for a velocity and a temperature profile.

58 citations

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TL;DR: In this article, the authors developed a special form of Reynolds equation for such homogenized conditions applied to the incompressible Newtonian case, which allows the calculation of the operating characteristics of a contact by taking into account the local geometry of surfaces while making a substantial improvement in computing time.
Abstract: Homogenization is a formal mathematical two-scale averaging process that can be applied to roughness problems and can replace previous heuristic averaging procedures, which have sometimes led to ambiguous results This procedure was previously mathematically developed and applied to compressible flow problems The purpose of this paper is the development of a special form of Reynolds equation for such homogenized conditions applied to the incompressible Newtonian case The equation allows the calculation of the operating characteristics of a contact by taking into account the local geometry of surfaces while making a substantial improvement in computing time The method allows for the study of rough surfaces, but requires considerably fewer calculated points than for traditional deterministic discretization methods

55 citations

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TL;DR: The results demonstrate that finite element simulation is feasible and appear to be reproducible in modeling device/tissue interactions and quantifying anatomic deformations during EVAR.

50 citations

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TL;DR: In this article, an approach based on strength and rigorous mathematical model is proposed to avoid numerical problems which are usually encountered in classical approaches, which is in some sense, a generalization of the film-averaging technique suitable for configurations in which some parameters of the latter (such as the Boltzmann correction factor) are not unambiguously defined.
Abstract: This article is concerned with the simulation of a magnetic storage device consisting of a flying head above a rigid rotating disk. The need to improve the transfer rate has led, at present, to very small surface-to-surface distances (air gaps). In this situation it is compulsory to take into account roughness effects. A popular method consists in averaging film-thickness from Mitsuya et al. (1989), with good reported results compared with experimental data. To overcome some limitations that become apparent at very small air gaps, notably when the roughness is two-dimensional, Jai in 1995 introduced a new technique based on a rigorous homogenization theory. Recent developments from Buscaglia and Jai (2000) have greatly reduced the computational complexity of the homogenization-based method, rendering it suitable for practical applications. We propose in this paper an original approach based on strength and rigorous mathematical model to avoid numerical problems which are usually encountered in classical approaches. The validation of the homogenization-based method is in some sense, a generalization of the film-averaging technique suitable for configurations in which some parameters of the latter (such as the Boltzmann correction factor) are not unambiguously defined.

46 citations


Cited by
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01 Jan 2007

1,932 citations

Journal ArticleDOI
Alfred Grill1
TL;DR: A review of the state of the art of the preparation of diamond-like carbon films, the characterization and understanding of their properties, and their practical applications can be found in this article.

939 citations

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TL;DR: In this paper, the authors provide a comparative summary of different modeling techniques for fluid flow, cavitation and micro-hydrodynamic effects for surface texturing, and provide the key findings.

590 citations

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TL;DR: Any comprehensive review of the membrane technology field written today would have to contain even more references than this one does; it is partly an overview, giving my opinions of what, among all the work done in this field over the past two centuries or so, is most relevant.

537 citations