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In various systems of energy, such as turbo-machinery and viscous-lock system, squeeze film plays a crucial role for improving transport systems. The importance of the aforementioned applications led us to explore the physical behavior of Rabinowitsch fluid flow for several values of viscosity, Q ∈ [ 0 − 1 ] , load capacity (W ∗) , nonlinear factor, ω = [ − 2 × 1 0 − 4 , 0 , 2 × 1 0 − 4 ] , dimensionless film thickness (h ∗) , dimensionless radius of the capillary tube (R 0 ∗) , dimensionless thickness of porous pad (H 0 ∗ = 0 , 0. 1 , 0. 2), inner and outer radius ratio (Ω = 0 , 0. 2 , 0. 4) , roughness parameter (c ∗ = 0 , 0. 1 , 0. 2 , 0. 3 , 0. 4) through a squeeze film with two rough porous annular discs. Five-point Gauss quadrature integral formula has been used to examine the characteristics of annular discs, and small perturbation method has been used to discretize the governing Rabinowitsch fluid flow (RFF) equations. The modified Reynolds equation for rough, porous and viscosity change with film thickness is developed using Christensen's stochastic theory, modified Darcy's theory and the association between viscosity and film thickness agreement. The impacts of ω on the behavior of porosity and viscosity variability of RFF have been visually depicted in terms of film pressure, load capacity and squeeze reaction time of annular discs. It has been determined that for RFF with variable viscosity and roughness parameter on a porous media, the performance of the annular disks enhances for ω = − 2 × 1 0 − 4 (dilatant lubricant), and diminishes for ω = 2 × 1 0 − 4 (pseudo-plastic lubricant). It has been found that the film pressure in case of dilatant lubricant is increased by the influence of Rabinowitsch fluids on porous walls, but the behavior of pseudo-plastic lubricants has an opposite tendency relative to Newtonian lubricants. It has also been found that the impact of variability in porosity, roughness and viscosity diminishes the load-carrying capacity (LCC) with increased film thickness than the case of nonporous, smooth surface and constant viscosity of Rabinowitsch fluid. [ABSTRACT FROM AUTHOR]

The KAZE algorithm has been popularly used to match the remote sensing images. However, it has limited performance when its standard form is directly applied to match the synthetic aperture radar (SAR) images containing significant multiplicative speckle noise. In this paper, an effective SAR image matching algorithm is proposed, which is a combination of KAZE, phase congruency, and speckle noise removing anisotropic diffusion. In this algorithm, the ratio-based Phase Congruency (PC) information is used to eliminate the erroneous features, which improves the repeatability rate of the KAZE features. In addition, the scale layers of the input SAR images are constructed by speckle noise removing anisotropic diffusion method which significantly reduces the effect of noise. The proposed method can improve the repeatability of the extracted KAZE features. Moreover, it can give better recall and precision values than the state-of-the-art methods. It gives the root mean square error (RMSE) values in the range of 0.881 to 1.104 pixels in SAR image matching. Experiments on multi-temporal SAR images demonstrate the applicability of the proposed method. [ABSTRACT FROM AUTHOR]

This research aims to study the different phenomena of generalized Rayleigh waves (RWs) in composite structures with piezoelectric material and corrugated surfaces. A thin piezoelectric layer that is precisely attached to an elastic substrate with initial stresses makes up the structure under consideration. By resolving the related electromechanical field equations, expressions for the displacement potential function are produced for both the elastic substrate and the piezoelectric layer. The frequency equations of the studied wave have been discovered as determinants for electrically open and short conditions. There have been both numerical illustrations and graphical demonstrations. On the stage speed of the combined RW, the impact of the grooved border, initial pressure, piezoelectric constant, dielectric constant, and thickness of the piezoelectric layer have been studied. Additionally, the analytical solution to the issue is compared to and shown to be in good agreement with the stiffness matrix approach result. This study offers a theoretical foundation for creating and developing piezoelectric composite-based devices. It has been found that the generalized RW velocity declines with the increase of the values of e 1 5 ̃ and ε 1 1 and an inverse relationship has been found with the increase of the value of H. In addition, it has also been noticed that the velocity profile of the generalized RW is greatly influenced by the size of the corrugation (measured at the upper layer). [ABSTRACT FROM AUTHOR]

The present paper analyzes the Rabinowitsch fluid (RF) behavior on a pivoted curved slider with surface roughness (SR) with the aid of the perturbation technique. In order to account for the random roughness of the bearing surfaces, a stochastic random variable with a nonzero mean, variance, and skewness was taken into consideration. The averaged Reynolds equation (RE) was developed using a stochastic random variable. The load carrying capacity (LCC) and centre of pressure (COP) were obtained by solving the relevant stochastically averaged RE with appropriate boundary conditions. Bearing performance was observed to suffer as a result of transverse SR; nevertheless, the bearing system's efficiency can be increased in the case of negatively-skewed SR. It was demonstrated that, unlike a traditional lubricant, the bearing can withstand a LCC even in the absence of flow. The outcomes of the current paper can be helpful in various modern mathematical physics engineering applications. [ABSTRACT FROM AUTHOR]

This article, published in Acta Polytecnica: Journal of Advanced Engineering, examines the effects of porosity and surface roughness on annular discs under squeeze film lubrication. The study uses a semi-analytical approach and the Rabinowitsch fluid model to analyze the characteristics of the discs. The findings show that the performance of annular discs is significantly influenced by porous material and radial roughness patterns. The research aims to optimize the design of these discs for specific applications, such as heat exchangers and filtration systems. The text also provides equations and mathematical formulations to understand the behavior of fluid flow within these discs. The study concludes that further research should focus on advanced materials, optimization of porous structures, and numerical modeling. The provided list of references includes research papers that cover various aspects of lubrication in different systems and materials, providing valuable insights for researchers studying tribology and engineering. [Extracted from the article]