Effects of fluid inertia forces on the squeeze film characteristics of conical plates—ferromagnetic fluid model

Lin, Jaw‐Ren; Lin, Ming‐Chung; Hung, Tzu-Chen; Wang, Pin-Yu

doi:10.1002/ls.1206

Cited by 9 publications

(7 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results derived from Vadher et al [32] in the case of non-conducting plates agrees with the results presented here to a good degree in the sense that the load carrying capacity in both the cases differ by 0.013%. Even if, Shliomis ferromagnetic model was used in Lin et al [33], the load carrying capacity observed there and the load carrying capacity found here, do not defer much at least in the case of the negatively skewed roughness especially, when negative variance is involved. This article suggests that the roughness and the angle of the cone of the conical bearing must be given due consideration while designing the bearing system even if there is the presence of a strong magnetic fluid.…”

Section: Resultscontrasting

confidence: 55%

“…Besides, the conductivity also increased the load carrying capacity. Lin et al [33] analyzed the effects of fluid inertia forces on the squeeze film characteristics of conical plates with ferromagnetic fluid model. This discussion was mainly, concerned with the influences of convective fluid inertia forces in Shliomis model based ferromagnetic squeeze film in conical plates.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic fluid based squeeze film between porous rough conical plates

Deheri

Patel²,

Patel

2013

JCM

View full text Add to dashboard Cite

We make an endeavor to study and analyze the effect of surface roughness on the performance of a magnetic fluid based squeeze film between conical plates. The lubricant used here is a magnetic fluid and the external magnetic field is oblique to the lower plate. The bearing surfaces are assumed to be transversely rough. The roughness of the bearing surface is modeled by a stochastic random variable with non-zero mean variance and skew-ness. The associated Reynolds' equation is solved with appropriate boundary conditions to get the pressure distribution, which is, then used to obtain the expression for load carrying capacity leading to the computation of the response time. The results are presented graphically as well as in tabular form. It is noticed that although the bearing suffers owing to transverse surface roughness, the load carrying capacity registers an increase in the case of negatively skewed roughness. Even the negative variance causes an increase in the load carrying capacity. It is observed that the reduction in the load carrying capacity induced by the porosity and the standard deviation can be neutralized up to certain extent by the positive effect of the magnetization parameter μ * with suitable values of the semi-vertical angle ω in the case of negatively skewed roughness. A close scrutiny of some of the results presented graphically makes it clear that the positive effect of variance dominates the effect of the skew-ness whose impact is slightly better than that of the magnetization parameter. It is needless to say that the performance of the rough bearing with the magnetic fluid lubricant is definitely better than the one with conventional lubricant. This article reveals that there is a scope for enhancing the performance of the bearing system considerably by choosing a suitable combination of the magnetization parameter and semi-vertical angle of the cone in the case of negatively skewed roughness especially when negative variance is involved.

show abstract

Section: Resultscontrasting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Magnetic fluid based squeeze film between porous rough conical plates

Deheri

Patel²,

Patel

2013

JCM

View full text Add to dashboard Cite

show abstract

“…Because of the increasing fluid velocity, the effects of fluid inertia forces need to be included in the study of FFs‐lubricated squeeze films. In this respect, lots of work based on Shliomis model has been done by Lin and his colleagues . According to their results, the effects of fluid inertia forces were found to yield an increase in the load capacity and to prolong the approaching time for the FFs sphere‐plate system in the presence of transverse magnetic field.…”

Section: Ferrofluids Lubrication Based On Three Flow Modelsmentioning

confidence: 99%

“…In this respect, lots of work based on Shliomis model has been done by Lin and his colleagues. [67][68][69] According to their results, the effects of fluid inertia forces were found to yield an increase in the load capacity and to prolong the approaching time for the FFs sphereplate system in the presence of transverse magnetic field. Furthermore, for the squeezing circular plates is a special case of squeeze film between conical plates, the squeeze film characteristics of FFs-based conical plates including fluid inertia force is of interest.…”

Section: Ferrofluids Lubricationmentioning

confidence: 99%

Ferrofluids lubrication: a status report

Huang

Wang

2015

Lubrication Science

View full text Add to dashboard Cite

Ferrofluids (FFs) are stable colloidal suspensions composed of single‐domain magnetic nanoparticles dispersed in a carrier liquid. And it is an intelligent material, exhibiting normal liquid behaviour coupled with superparamagnetic properties. Since the properties and the location of these fluids can easily be influenced by a magnetic field, FFs have recently attracted many scientific, industrial and commercial applications. Lubrication is one of the most important applications for FFs, and the advantage of FFs as lubricant, over the conventional ones, is that the former can be retained at the desired location with moderate magnetic fields. The main focus of this paper is to present a comprehensive review on FFs lubrication theories based on the three flow models of Neuringer–Rosensweig, Shliomis and Jenkins. Besides, a few experimental studies on FFs lubrication are discussed briefly. Copyright © 2015 John Wiley & Sons, Ltd.

show abstract

“…A squeeze film has a lot of different applications in automobile and domestic appliances. That is why, researchers like (Bhat and Deheri 1991, Lin et. al.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ferrofluid Lubrication on Longitudinally Rough Truncated Conical Plates with Slip Velocity

Munshi

Patel

Deheri

2019

Math. J. Interdiscip. Sci.

View full text Add to dashboard Cite

The study focuses on analyzing the effect of slip velocity in the case of a Ferrofluid squeeze film when the surface of truncated cone-shaped plates has a longitudinal roughness. Each oblique to the bottom plate was utilized by the external magnetic field. The bearing surface has a roughness that is designed with the help of a random stochastic variable having a nonzero mean, skewness and variance. The load carrying ability of a bearing system’s surface is determined by calculating the dispersal of pressure in the system, which is calculated by using the associated stochastically average Reynolds’ equation. The graphs obtained from the study shows that there is a correlation between the longitudinal surface roughness and the bearing system performance. The magnetic fluid lubrication has a positive impact on a system’s bearing capacity. However, the load bearing capacity declines as a result of the effect of slip. A high negative skewness of the surface roughness also has a positive impact on a bearing’s load carrying capacity. One interesting finding shows that contrasting to the results of transverse roughness, standard deviation positively impacts the load bearing capacity. This investigation suggests despite the im-portance of aspect ratio and semi vertical angle is significant for performance enhancement, it is also essential to maintain the slip at the lowest level.

show abstract

Effects of fluid inertia forces on the squeeze film characteristics of conical plates—ferromagnetic fluid model

Cited by 9 publications

References 21 publications

Magnetic fluid based squeeze film between porous rough conical plates

Magnetic fluid based squeeze film between porous rough conical plates

Ferrofluids lubrication: a status report

Influence of Ferrofluid Lubrication on Longitudinally Rough Truncated Conical Plates with Slip Velocity

Contact Info

Product

Resources

About