Effect of viscosity variation on non-Newtonian lubrication of squeeze film conical bearing having porous wall operating with Rabinowitsch fluid model

Rao, Pentyala Srinivasa; Rahul, Amit Kumar

doi:10.1177/0954406218790285

Cited by 10 publications

(6 citation statements)

References 20 publications

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“…Some notable studies on the Rabinowitsch fluid model can be found in the literature. 37–40 The experimental observation of this fluid model was excellently reported by Wada and Hayashi. 41 To the best of the author's knowledge, no endeavour has been made to attempt this problem for Rabinowitsch fluid in both tube and channel confinements.…”

Section: Introductionsupporting

confidence: 75%

Graetz problem for the Rabinowitsch fluid model: A comparative analysis for circular tube and flat channel

Khan

Asghar

Ali

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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The current set of themes related to the analysis of heat transfer by convection and heat transfer in a tube or channel is commonly referred to as the Graetz problem, which is to investigate the evolution of the temperature profile for a fluid flow in hydrodynamic developed laminar flow. The current research, in this regard, reports the Graetz problem for the constant wall(s) temperature case using the Rabinowitsch fluid model. The associated energy equation is solved via a classical separation of variable approach. The special case of the Rabinowitsch fluid model is also highlighted. The resultant boundary value problem is addressed computationally using the Matlab bvp4c function and the Runge–Kutta method. The real and positive eigenvalues along with the numerical solutions are obtained for the calculation of the temperature field. This study also explains that the Rabinowitsch model has both shear-thinning and shear-thickening effects. The impact of model parameters on mean temperature and Nusselt numbers are thoroughly examined with various graphs.

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Section: Introductionsupporting

confidence: 75%

Graetz problem for the Rabinowitsch fluid model: A comparative analysis for circular tube and flat channel

Khan

Asghar

Ali

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…A higher viscosity of the elastic artificial skin compositions could demonstrate stronger resistance against the spread forces applied to the compositions when the artificial skins were synthesized. Therefore, the thickness of the elastic artificial skin was increased when the viscosity of the formulations was increased [ 79 , 80 ]. The difference in thickness of AB0 and of AB15 exhibited a statistical significance of p < 0.05.…”

Section: Resultsmentioning

confidence: 99%

Design and Characterization of Elastic Artificial Skin Containing Adenosine-Loaded Solid Lipid Nanoparticles for Treating Wrinkles

Yeo

Jung

Cho³

et al. 2020

Pharmaceutics

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Adenosine (AD), which is used for treating wrinkles, exhibits poor skin permeation. The aim of the present study was to develop a cross-linked silicone-based cellulose elastomer as an elastic artificial skin for the treatment of skin wrinkles, a biocompatible lipid-based nano-carrier for enhancing the skin permeation of AD, and a formulation consisting of the lipid-based carrier incorporated in the elastic artificial skin. AD-loaded solid lipid nanoparticles (SLNs) were prepared using a double-emulsion method. Particle characteristics and mechanical properties of SLNs and elastic artificial skin, respectively, were assessed. Skin permeation was evaluated using SkinEthic RHE tissue, a reconstructed human epidermis model. The mean particle size and zeta potential for SLNs ranged from 123.57 to 248.90 nm and −13.23 to −41.23 mV, respectively. The components of neither SLNs nor the elastic artificial skin were cytotoxic, according to cell- and tissue-viability assays and EU classification. SLNs and the elastic artificial skin exhibited sustained drug release for 48 h. The amount of AD released from SLNs and elastic artificial skin was approximately 10 times and 5 times higher, respectively, than that from AD solution. Therefore, elastic artificial skin incorporated with AD-loaded SLNs may serve as a promising topical delivery system for cosmeceutical treatment of skin wrinkles.

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“…However, journal bearings with rigid linear and different geometrical configurations and operating conditions are the most studied sliding bearings. We may cite the following study examples: infinitely long, 35 short 36 and finite-length width 37,38 plain and partial bearings, porous bearings, 39 hydrostatic, 40 hybrid, 41 and non-circular elliptical, 42 two-lobe 43 and conical 44 journal bearings, etc. It should be noted that in the literature review, many studies have been reported on elastohydrodynamic lubrication of journal bearings considering the rheological behavior of lubricants.…”

Section: Introductionmentioning

confidence: 99%

Performance of hydrodynamic textured journal bearing with the combined influence of elastic deformation and pseudo-plastic lubricant

Manser

Khelladi

Deligant

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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This study outlines the performances of finite-length journal bearing with textured liner, shear-thinning Rabinowitsch lubricants, and considers the elastic deformation of the bearing liner. The yielded nonlinear Rabinowitsch-Reynolds PDE system has been solved using the finite difference method combined with Elrod’s algorithm for the case of cylindrical textures. The static performance of hydrodynamic lubrication, in this case, involves different parameters such as depth of texture, eccentricity ratio, elastic deformation factor, rheological index, etc. Results showed that, at a fixed eccentricity ratio, texturing of the bearing’s converging area enhances significantly the load-carrying capacity and reduces the friction coefficient compared to the smooth bearing surface (up to [Formula: see text] in load capacity and [Formula: see text] in friction coefficient). On the other hand, using a lubricant with more pronounced shear-thinning behavior and/or elastic liner reduces the journal bearing performances (up to [Formula: see text] in load capacity and [Formula: see text] in pressure). By applying the optimization technique (particle swarm optimization), an optimal arrangement of textures that can compensate for these losses in performance even at high eccentricity has been found. This optimal texture with dimensionless dimple’s depth set to 1 [Formula: see text] improves the load capacity with [Formula: see text] for a lubricant with a rheological index [Formula: see text] and elastic bearing liner with deformation parameter [Formula: see text].

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Effect of viscosity variation on non-Newtonian lubrication of squeeze film conical bearing having porous wall operating with Rabinowitsch fluid model

Cited by 10 publications

References 20 publications

Graetz problem for the Rabinowitsch fluid model: A comparative analysis for circular tube and flat channel

Graetz problem for the Rabinowitsch fluid model: A comparative analysis for circular tube and flat channel

Design and Characterization of Elastic Artificial Skin Containing Adenosine-Loaded Solid Lipid Nanoparticles for Treating Wrinkles

Performance of hydrodynamic textured journal bearing with the combined influence of elastic deformation and pseudo-plastic lubricant

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