A NUMERICAL STUDY OF HEAT AND MASS TRANSFER OF WATER BASED NANOFLUIDS WITHIIN A CORRUGATED CAVITY FILLED WITH POROUS MEDIA.
Investigation of composition of Titanium Material after Anodizing
Band Structure and Density of States of Rubidium and Cesium
A short review on interfacial science, rheology and surfactants; An application oriented approach
Nanofibers in Therapeutics: Breaking New Grounds in Drug Delivery
Investigation of Temperature Sensitive Electrical Properties of Manganese-Zinc Ferrites
Effect of TiO2 Modifier Oxide on a B2O3 Glass System
Synthesis, Structural Characterization and DC Conductivity Study of (PMMA+PEG) Polymer Blend Films
Erbium Rare-Earth Metal Schottky Contact to P-Type Si and its Temperature-Dependent Current-Voltage Characteristics
Study of Moderate Temperature Plasma Nitriding of Inconel 601 Alloy
Study of Moderate Temperature Plasma Nitriding of Inconel 601 Alloy
Exact Solution of an Unsteady Buoyancy Force Effects on MHD Free Convective Boundary Layer Flow of Non-Newtonian Jeffrey Fluid
Nanofibers in Therapeutics: Breaking New Grounds in Drug Delivery
Synthesis and Characterization of SnO2 Nanoparticles
Mapping and Forecasting the Land Surface Temperature in Response to the Land Use and Land Cover Changes using Machine Learning Over the Southernmost Municipal Corporation of Tamilnadu, India
In this research, laminar flow, heat transfer, and mass transfer of a nanofluid in a porous medium have been studied using Buongiorno's two-phase model. The porous media put in place is a cavity of a non-uniform octagonal shape. This research aims to highlight the effect of certain parameters on the evolution of the hydrodynamic, thermal, and mass profiles such as the number of Rayleigh (Ra = 103 to 106), of Darcy (Da = 10-6 to 10-2), Lewis (Le = 0.1 to 1), Brownian motion (Nb = 0.1 to 1) and thermophoresis parameter (Nt = 0.1 to 1). In addition, a geometric contribution has been introduced and varied to increase the rate of heat transfer within the porous cavity. This addition consists of corrugating the right (cold) wall according to different wave numbers (n) and different amplitudes (A). The presented study showed results of an increase in the rate of heat transfer in the cavity through the increase in the Nusselt number with the increase in the number of waves on one hand and their amplitude on the other hand. At a relatively low Rayleigh number, there is the appearance of a movement of the fluid, and the high permeability increases heat transfer as well as the fluid flow velocities. There’s the formation of dead zones at the level of the lower waves, which then leads to reduced heat transfer efficiency.
Titanium alloy is widely used in the biomedical sector due to its corrosion resistance, excellent mechanical properties, and biocompatibility. Anodizing is a surface treatment process known to improve the bioactivity of titanium alloys. In the current investigation, a Ti-Al-V sample was used to study the effects of anodizing on the material composition after the anodizing process. Microstructure analysis was performed on the same sample to examine the material structure and grain formation. The results showed minor changes in the elemental composition of the material after anodizing, but these changes fall within the acceptable limits as per the standard. Additionally, SEM results reveal finely distributed beta particles within the alpha grain matrix. Thus, this study provides valuable insights into the effects of anodizing on the surface characteristics of titanium alloy, which can be useful for optimizing its performance in biomedical applications.
The electronic band structure, density of states and the behaviour of conduction and valence bands in body-centered cubic rubidium and cesium, particularly under varying pressure conditions are studied. The research examines how rubidium’s and cesium’s lattice constant and pressure change with reduced volume, providing insights into its structural properties. Furthermore, the distribution of electron energy levels is analysed through the density of states across different energy regions. The conduction and valence band widths are calculated relative to the Fermi level and mapped across key symmetry points in the Brillouin zone.
This study explores the intricate realm of surface rheology, emphasizing the behavior of fluid interfaces in complex systems. With applications across industries such as food, pharmaceuticals, and petroleum, the study reviews recent developments in surface rheology, focusing on its phenomenological approach. The importance of surface rheological parameters in understanding the physical behavior of systems with fluid interfaces is highlighted, considering two primary approaches: one based on molecular properties and the other treating the interface as a two-dimensional body. Challenges arising from non-autonomous fluid interfaces, unique deformations, and the significance of surface rheology in practical applications, including emulsification and foaming, are thoroughly addressed. In the context of the petroleum industry, the study underscores the critical role of understanding the rheological properties of heavy crude oil for addressing challenges in oil-water emulsion stabilization. Asphaltenes and resins in heavy crude oil form viscous films at the oil-water interface, influencing emulsion stability. The study introduces surfactants, highlighting their surface-active properties and pervasive presence in various industries. The impact of surfactants on emulsion stability, cleaning formulations, and enhanced oil recovery is discussed, providing insights into their crucial role. The exploration extends to the evolving landscape of surfactant science, emphasizing the synthesis of new surfactant molecules and their potential applications in nanoparticle synthesis and environmentally friendly consumer products. Polymeric surfactants, which can form stable films at interfaces, were examined, addressing the criteria for stable Langmuir films from polymers. Block copolymer films, especially in medical diagnostics and water treatment engineering, showcase the versatility of polymeric surfactants in emulsion stabilization.
Nanofibers possess unique properties that make them ideal for designing controlled drug delivery systems. Their high surface area to volume ratio and porosity make them suitable for advanced applications such as biodegradable and controlled drug delivery systems, offering benefits like site-specific drug delivery to the body. Nanofibers represent an innovative class of materials produced using advanced manufacturing processes, resulting in geometrical shapes like nonwoven webs, yarns, and bulk structures.Synthetic polymer nanofibers are typically made from materials such as nylon, acrylic, polycarbonate, polysulfones, and fluoropolymers. On the other hand, biological polymer nanofibers are derived from substances like polycaprolactam, chitosan, polylactic acid, and copolymers of polylactic/glycolic acid, among other biopolymers.Several techniques exist for synthesizing nanofibers, including electrospinning, self-assembly, and phase separation, with electrospinning being the most widely adopted method. Bioactive molecules such as anti-cancer drugs, enzymes, cytokines, and polysaccharides can be encapsulated within the nanofiber's interior or immobilized on its surface for controlled drug delivery purposes.Recent advancements have led to the development of protein-based nanofibers, significantly enhancing drug delivery techniques for treating cancers, heart diseases, Alzheimer's disease, and promoting tissue regeneration including bone and cartilage. This paper provides insights into nanofiber fabrication, characteristics, and their sophisticated applications in drug delivery, tissue engineering, and filter media.
