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605 articles for “Navier–Stokes equation”
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The Theoretical and Experimental Study of the Behavior of the Mercury Drop, Fixed on the Glass Bottom of Vessel with Fluid, Under the Acceleration of Gravity Change
Abstract: At present time, accumulated theoretical material of the studies of the equilibrium forms of the gas bubbles or mercury drops, fixed on the surface of solid material in the fluid or on the glass bottom of vessel with fluid, under the acceleration of gravity change, was carried out either on the basis of geometric similarity laws that greatly simplify the essence of physical processes, or on the basis of theoretical …
Published in Recent Trends in Fluid Mechanics · Vol. 8, Issue 2, 2021 · pp. 1–12 Read article
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Inclusion Removal Study in a Integrated Tundish-Nozzle-Mold System by CFD
Abstract: CFD modelling is a powerful tool to study the complex flow phenomena happening in each step of the continuous casting process; considering this, the current research shows the impact of tundish turbulent phenomena on fluid dynamics and steel cleanliness considering an integrated system: tundish, nozzle, and mold. The mathematical simulations consider 3D cartesian coordinates for the continuity and Navier-Stokes equations together with the turbulent realizable and the multiphase VOF models. …
Published in Recent Trends in Fluid Mechanics · Vol. 9, Issue 2, 2022 · pp. 1–14 Read article
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Study of Water and Ethylene Glycol Based Cu Nanoparticles inside Parallel Disks with VMHD
Abstract: In this article, we have developed a mathematical model for water and ethylene glycol based copper nanoparticles between two parallel Disks under the influence of variable magnetic field. Parametric study for the flow field, temperature variation and magnetic field are performed from the set of Navier-Stokes, Energy and from the Maxwell equations. Coupled system of PDE’s are converted into system of ODE’s by means of similarity transformations. Effects of various …
Published in Recent Trends in Fluid Mechanics · Vol. 9, Issue 3, 2022 · pp. 34–43 Read article
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Enhancing Portability and Convenience: Bag Pack Umbrella Review
Abstract: The carry-on bag, that is, a backpack that can be slung over the user's shoulders with two cotton straps, is covered under the utility model. An umbrella-and-bag arrangement, which combines an umbrella and a bag, is also shown in the utilitarian model. When using the umbrella, this assembly frees up the user's hands. Loop-closure equations were created by considering the affine mapping from two dimensions to three dimensions. These equations …
Published in Recent Trends in Sensor Research & Technology · Vol. 10, Issue 3, 2023 · pp. 1–5 Read article
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Modeling and Simulation Study of Flow and Temperature Characteristics of a Pen-shaped Plasma Torch
Abstract: This study presents the numerical modeling, simulation and experimental findings of plasma flow and temperature characteristics in pen-shaped plasma torch. The complex plasma flow characteristic due to the interaction between electric arc and nitrogen gas inside the pen-shaped plasma torch is modeled using the Maxwell’s and the Magnetic-Hydrodynamic (MHD) equations. Cartesian coordinate based finite volume discretization is used to solve numerically all the governing equations. At a specific boundary condition, …
Published in Trends in Mechanical Engineering & Technology · Vol. 9, Issue 3, 2019 · pp. 22–30 Read article
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Measurement of Defects in Car Bearings and Its Effect on Ultrasonic Waves
Abstract: As one of the defects of roller bearings due to intermittent coupling forces and external impact loads,surface cracks due to corrosion or wear may have many defects for rotating machines. Surfacecracking on the bearing or its ball is one of the important factors in the efficiency of the bearing andits opening. It is useful to study these cracks and identify the type and size of these cracks for bearingsused in …
Published in Trends in Mechanical Engineering & Technology · Vol. 11, Issue 1, 2021 · pp. 44–49 Read article
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A Unique Approach for Disc Encryption Based on Data Matrix
Abstract: The number of cloud users is growing due to contemporary facilities and technology. The Internet and cloud computing are the most often used categories nowadays. User privacy is a concern in cloud computing. Various approaches are being used to protect the data from intruders. This article uses a key to protect data that is comparable to plain text. The plain text and the key are partitioned into a matrix with …
Published in Journal of Communication Engineering & Systems · Vol. 13, Issue 3, 2023 · pp. 6–21 Read article
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Unified Mathematical Framework for Semiconductor Devices, Junction Dynamics, and Circuit Analysis
Abstract: Semiconductor devices form the fundamental building blocks of modern electronic and integrated circuit systems, where their electrical behavior is governed by coupled carrier transport, electrostatic, and circuit-level phenomena. This work presents a unified mathematical framework for modeling semiconductor devices, junction dynamics, and their interaction with electronic circuits. The formulation integrates fundamental semiconductor relations, carrier concentration, drift–diffusion transport, Poisson’s equation, continuity equations, PN-junction behavior, diode characteristics, bipolar junction transistor operation, and …
Published in Journal of Semiconductor Devices and Circuits · Vol. 13, Issue 2, 2026 · pp. 37–47 Read article
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Emergent and Self Organizing behavior in Heat Diffusion Model
Abstract: Abstract-Heat Diffusion equation is used to determine thechange in the function of u over time. We try to discuss different experimental parameters from an existent heat diffusion model given by Netlogo for simulation of steady-state temperature distribution of a thin plate as the model shows complex behavior when we change the temperature of the sides to different levels. In addition, we try to modify the model and discuss how emergence …
Published in Journal of Software Engineering Tools & Technology Trends · Vol. 4, Issue 3, 2017 · pp. 17–22 Read article
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Generalized Yang-Fourier Transforms by using K-Function to Heat Conduction in a Semi-infinite Fractal Bar
Abstract: The main objective of present research paper to solve one-dimensional fractal heat-conduction differential equation problem in a fractal semi-infinite bar has been developed by local fractional calculus employing the analytical Generalized Yang-Fourier transforms method.Keywords: Fractal bar, heat-conduction equation, Generalized Yang-Fourier transforms, Yang-Fourier transforms, local fractional calculus, K-FunctionCite this ArticleManoj Sharma, Kiran Sharma. Generalized Yang-Fourier Transforms by using K-Function to Heat Conduction in a Semi-Infinite Fractal Bar. Research & Reviews: Discrete …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 6, Issue 3, 2019 · pp. 13–18 Read article
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Certain Results Involving Ramanujan’s Theta Functions
Abstract: In this present work, our main aim is to obtain “certain results involving Ramanujan’s theta functions”. In this paper, we have evaluated Ramanujan’s theta functions by making use of certain modular equations due to Ramanujan. Using these values of theta functions, we have also evaluated Ramanujan’s cubic continued fraction and Ramanujan–Weber class invariants Gn and gn.Keywords: Ramanujan’s theta functions, modular equations, Ramanujan–Weber class invariants, Ramanujan’s cubic continued fraction, Modular identitiesCite …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 7, Issue 1, 2020 · pp. 6–15 Read article
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An Application of Fractional Calculus in L-R and C-R Circuit
Abstract: In this paper, we proposed a Fractional differential equation for the electrical L-R and C-R Circuit and obtained the solution in the form of Mittag-Leffler function.Keywords: Circuit analysis, L-R and C-R circuit, Fractional differential equation, Riemann-Liouville Fractional derivative, Laplace transform, Inverse Laplace transform.Mathematical Subject Classification: -26A33, 33E12, 44A10Cite this Article: Laxmi Morya, Manoj Sharma, Rajshree Mishra. An Application of Fractional Calculus in L-R andC-R Circuit. Research & Reviews: Discrete Mathematical …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 7, Issue 2, 2020 · pp. 14–17 Read article
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Fuzzy Logic and Fuzzy Logic Sun Tracking Control
Abstract: Fuzzy logic could be a rule-based call method that seeks to unravel issues wherever the system is tough to model and where ambiguity or unclearness is thick between two extremes. Mathematical logic permits the system to be outlined by logic equations instead of complicated completely differential equations and comes from a thinking that identifies and takes advantage of the greyness between the 2 extremes. Mathematical logic systems are composed of …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 8, Issue 3, 2021 · pp. 9–19 Read article
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Improve Life Time of LEACH Routing Protocol in Wireless Sensor Network
Abstract: In wireless network, nodes are generally battery powered; so due to constrain in energy it is very tough to perform some tasks with this type of node for very long time. Hierarchical-based routing protocol is efficient solution to this problem. LEACH is hierarchical routing protocol that engages randomized rotation of cluster head to equal distribution of energy load between sensor nodes in the network. LEACH also supports data aggregation in …
Published in Journal Of Network security · Vol. 3, Issue 3, 2015 · pp. 1–8 Read article
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Modeling and Simulation of Spiral Plate Heat Exchanger
Abstract: The spiral-plate heat exchanger (SHE) offers efficiency in spacing and reduces heat losses. SHE’s offer high reliability, lower spaces occupancy, high heat transfer coefficient and on-line performance in many severely fouling services such as slurries. Experimental investigations were conducted in a spiral plate heat exchanger with hot water as the service fluid and cold water in different flow rates as the cold process fluid. The experiments were conducted essentially in …
Published in Journal of Thermal Engineering and Applications · Vol. 1, Issue 1, 2014 · pp. 22–29 Read article
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One Dimensional Thermal Model for Heat Flow in Friction Stud Welding
Abstract: Friction stud welding is a solid-state process in which the heat for welding is produced by direct conversion of mechanical energy to thermal energy at the interface of the components without the application of electric energy or heat from other external sources. Since it is thermal energy process, study of thermal behavior of dissimilar metals during friction stud welding process is important. Though there exist many thermal models for friction …
Published in Journal of Thermal Engineering and Applications · Vol. 2, Issue 2, 2015 · pp. 22–27 Read article
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Vortex Shedding Characteristics of Tapered Cylinders at Turbulent Wake
Abstract: The physics of flow regime around a tapered cylinder is strongly three-dimensional (3D) and complex. These pose numerical difficulties in capturing the vortex shedding phenomena in the wake of cylinder. This paper discusses the main characteristics of vortex shedding behind a fixed linearly tapered circular cylinder at relatively high Reynolds numbers. A computational fluid dynamics model is employed to solve the 3D incompressible transient Navier-Stokes governing equations. The numerical model …
Published in Journal of Offshore Structure and Technology · Vol. 1, Issue 1, 2014 · pp. 25–38 Read article
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Interference Effect Analysis of Pilot Contaminated Massive MIMO Downlink with Different Pre-coders and Channel Estimation
Abstract: A new idea in cellular MU-MIMO is the use of large numbers of BS antennas to serve several single-antenna terminals simultaneously. In multi-cell environments, adjacent cells using the same spectrum cause a pilot contamination problem and degrade signal quality. This pilot overhead can be reduced by reusing pilot sequences in nearby cells; however, this potentially introduces interference in the channel estimation phase, the so-called "pilot contamination" effect. The achievable rate …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 4, Issue 2, 2017 · pp. 1–9 Read article
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Determination of Maximum Allowable Pump Speed for Transferring Fluid to a Vertical Height at Constant Power
Abstract: This work determines the maximum possible velocity fluids can be transported through a vertical height at constant pump power. The analysis involves simulation of theoretical piping equations and analysis of the pump pressure, frictional pressure drop and static (atmospheric) pressure with respect to flow velocity using MS excel and Matlab. Computational results obtained from MS excel and represented graphically in Matlab establish the maximum allowable velocity – below which the …
Published in Recent Trends in Fluid Mechanics · Vol. 1, Issue 1, 2014 · pp. 31–40 Read article
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A Review of Fluid Flow and Heat Transfer in Impinging Jet System
Abstract: Fluid flow and heat transfer in impinging air jet are of great importance in different engineering applications. The review concentrates on heat transfer studies in impinging air jet based on Nozzle geometry, Reynolds No, Nozzle to plate spacing, Nozzles with arrays or mesh screens, porous plates, oblique angle, plate geometry, plate surfaces and cross flow of jet and incorporates two major parts namely, experimental and numerical methodologies. Experimental methodologies employ …
Published in Recent Trends in Fluid Mechanics · Vol. 2, Issue 1, 2015 · pp. 1–14 Read article