In this research, we analyze the effect of the geometric characteristics of the ceramics as well as the effect of their placement at different distances on the temperature distribution of the furnace. The computational analysis and simulation aimed at producing results were carried out with the ANSYS-CFX computer package. The analysis was based on how these factors affect the backflow and specifically to what extent the temperature rises in the preheating zone and how well we can maintain better thermal uniformity. Specifically, reducing the height of the stacks as well as increasing their width gives a greater increase in the backflow. The thermal distribution shows great non-uniformity by modifying these parameters. However, these smaller stacking widths help in thermal homogeneity. In relation to flow velocity and turbulence, it was observed that we have higher values in the center of the oven than on the sides. There is also great sensitivity to the Reynolds number.
The heat transfer problem over an inclined surface has emerged as a significant topic of interest among researchers. Its application has grown and has been highlighted particularly because of its durability in engineering developments. Hence, in accordance with the current phase of development, a mathematical model of steady flow and heat transmission involving an alumina-copper dusty hybrid nanofluid across inclined, stretched, and shrunk surfaces by implementing viscous dissipation and slip conditions has been proposed. Similarity transformations were utilized in reducing the governing equations to a set of ordinary differential equations (ODEs), and the numerical results were achieved by employing a bvp4c solver in MATLAB. The findings highlighted that dual solutions occur in both cases for shrinking surfaces. Moreover, both the skin friction coefficient and the rate of heat transmission decrease with increasing inclination angle. In contrast, the rise in Eckert number values, which implies viscous dissipation, depicts an upsurging pattern for the coefficient of skin friction while diminishing the rate of heat transmission between the fluid flow and the surface.
The paper deals with a problem of deriving reliable and convenient models for the viscous suspension films of variable rate flows. The contribution and novelty of this work lies in the fact that a general concept is presented for the mathematical model of the formation of nonlinear waves in the film flows containing a dispersed solid phase, an asymptotic analysis is given, and a set of the main control parameters has been established. Unlike the previous works, this paper focuses specifically on clearly identifying the control parameters and deriving the general control equation. The decisive role of the special control parameter depending on the viscosity of the suspension near the support wall has been established. The work is theoretical in nature, but the developed model can be adapted for calculations of specific technological processes, since it contains the main physical characteristics of suspensions and the necessary parameters for calculation.
This study investigates the effects of slip conditions and magnetic effects on the oscillatory flow of a Jeffrey fluid within an elastic tube. The perturbation method is employed to derive analytical solutions for the flow characteristics, and Gill's fourth-order method is used to solve the differential equation for the pressure numerically along with the initial conditions. The graphs illustrate how the Womersley, slip velocity, elasticity, Jeffrey, and magnetic parameters affect the mean pressure drop and modulus of wall shear stress. The results reveal that increasing the magnetic field strength and Womersley parameter, the wall shear stress rises in rigid and elastic tubes. Additionally, the slip condition modifies the velocity profile, enhancing fluid motion near the walls. The findings provide insight into the complex interplay of rheology, geometry, and magnetic forces in physiological oscillatory flows.
In this study we have evaluated the potential of locally sourced clays from the Patos region to be used as base material for water-based drilling fluids in the Patos-Marinza oil field. Four drilling fluid formulations with densities ranging from 1.05 to 1.20 g/cm³ were prepared and tested for density, suspension stability, sedimentation, sand content, filtration, and rheological behavior. The results show that while Patos clays provide acceptable rheological properties and low hydraulic resistance, they have relatively high filtration values and sand content, which may lead to serious problems. In order to overcome this disadvantage, we may need to use additives and filter the clay before use. From an economic perspective, the higher clay dosage and processing costs make them less competitive than imported bentonite under current conditions. However, their favorable flow characteristics suggest potential for use in deeper wells or alternative applications, provided further optimization is carried out.
