Transient cold-front-water through y-shaped aluminium ducts: nature of turbulence, non-equilibrium thermodynamics, and velocity at the converged and diverged outlets

Journal of Non-Equilibrium Thermodynamics, Journal Year: 2024, Volume and Issue: unknown

Published: June 6, 2024

Abstract The interaction between water motion efficiency, outlet control mechanisms, and energy dynamics management hinges significantly on turbulence characteristics. However, understanding the influence of input velocities duct features outlets remains elusive. This study employs realizable k − ɛ viscous model Reynolds-averaged Navier–Stokes equations (RANS equations) to explore transient encountering a cold front through ducts leading convergence or divergence. Using Ansys Fluent 2023R2 waterlight workflow, meticulous meshing is executed capture flow intricacies accurately. Grid independence, suitable boundary conditions, solver settings are carefully considered ensure reliable results for investigating four key research questions. Duct bending introduces non-uniformities in velocity distribution, impacting exit altering characteristics turbulence. In Case III, centrifugal forces from 90° bend result higher at convergent secondary patterns like swirls vortexes. Additionally, entrance Reynolds numbers, affecting mixing, heat transfer coefficients, regimes, thereby optimizing thermal conductivity. comprehensive investigation sheds light across various configurations, offering valuable insights into efficient performance enhancement.

Language: Английский

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Insight into turbulent Reynolds number at the regular, converging, and diverging outlets: Dynamics of air, water, and kerosene through y-shaped cylindrical copper ducts

International Communications in Heat and Mass Transfer, Journal Year: 2024, Volume and Issue: 159, P. 108044 - 108044

Published: Sept. 17, 2024

Language: Английский

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Exploration of Half‐Cycle Length of Converging Circular Wavy Duct with Diverging‐Outlet: Turbulent Water Dynamics

Advanced Theory and Simulations, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

Abstract The dynamics of water‐liquid flow through aluminum circular pipes are examined to investigate the effects half‐cycle length in converging wavy ducts with diverging outlets. This study provides insights into control, energy efficiency, enhanced heat transfer, and turbulence management, all which have significant industrial applications. SpaceClaim‐generated duct designs 40 mm major inlet diameters 10 minor inlets on either side, an output mm. Shear Stress Transport (SST) k‐ model ANSYS Fluent 2024R2 is used for better management pressure gradients precise prediction boundary layer behavior. Meshing simulation followed a strict methodology, assuring precision dependability. It worth noting that increasing number sinusoidal half‐cycles increases turbulence, raises Reynolds enhances cooling effect. Longer shown increase acceleration, resulting greater velocities more turbulent kinetic production. Turbulent viscosity 2.5‐period rises dramatically inflow velocity temperature. A 12.5‐period substantially than duct. These findings important implications applications require improved dissipation including exchanger design thermal systems.

Language: Английский

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Impact of porous material and slip condition on the MHD flow of immiscible Couple stress-Newtonian fluids through an inclined channel: Head loss and pressure difference

Chinese Journal of Physics, Journal Year: 2024, Volume and Issue: 89, P. 1198 - 1221

Published: April 3, 2024

Language: Английский

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Chitosan/magnetic biochar composite with enhanced reusability: Synergistic effect of functional groups and multilayer structure

Arabian Journal of Chemistry, Journal Year: 2024, Volume and Issue: 17(5), P. 105746 - 105746

Published: March 20, 2024

Heavy metals in water bodies pose a significant threat to both ecology and human well-being. Therefore, the development of green sustainable adsorbents for remediation is essential. This study presents crosslinked chitosan composite structure with multiple layers, which was generated by adjusting ratio wheat straw–derived magnetic biochar composite. The adsorption behavior under different conditions revealed varying Cr(VI) concentration, pH, temperature. exhibited maximum 121.8 mg g−1 water, 11.9 times higher than that biochar. It maintained residual performance 78.6 % after seven cycles, most chitosan-based composites. reusability improved via hydrochloric acid protonation functional groups layer-by-layer exposure structure. provides new insights into application composites derived from straw, an agricultural waste, as adsorbents.

Language: Английский

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Numerical prediction of strength and temperature changes within cemented paste backfill considering barricade stability

Engineering Science and Technology an International Journal, Journal Year: 2025, Volume and Issue: 62, P. 101966 - 101966

Published: Jan. 20, 2025

Language: Английский

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Special function form solutions of multi-parameter generalized Mittag-Leffler kernel based bio-heat fractional order model subject to thermal memory shocks

PLoS ONE, Journal Year: 2024, Volume and Issue: 19(3), P. e0299106 - e0299106

Published: March 8, 2024

The primary objective of this research is to develop a mathematical model, analyze the dynamic occurrence thermal shock and exploration how memory with moving line impact heat transfer within biological tissues. An extended version Pennes equation as its foundational framework, new fractional modelling approach called Prabhakar operator investigate novel time-fractional interpretation Fourier’s law that incorporates historical behaviour. This has multi parameter generalized Mittag-Leffler kernel. formulation flow, achieved through non-singular type kernel, enables representation finite propagation speed waves. Furthermore, dynamics source continually generates linear at predefined locations tissue. Introduced appropriate set variables transform governing equations into dimensionless form. Laplace (LT) operated on system results are presented in series form also expressed solution special functions. article derives analytical solutions for phenomena both domain, ordinary model real employing inverse transformation. pertinent parameter’s influence, such α , β γ 0 b gain insights transfer, brought under consideration reveal interesting graphical representations findings.

Language: Английский

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Transient radiative flow of hybrid nanofluid with slip effects over an impermeable spinning disk with porous material

Partial Differential Equations in Applied Mathematics, Journal Year: 2025, Volume and Issue: unknown, P. 101154 - 101154

Published: March 1, 2025

Language: Английский

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Insight into the optimal control strategies on corruption dynamics using fractional order derivatives

Scientific African, Journal Year: 2024, Volume and Issue: 23, P. e02069 - e02069

Published: Jan. 11, 2024

The fractional-order design for conceptualizing corruption offers several advantages on the spreading over integer-order models such as acknowledgement of intricate dynamics corruption, including super-spreading aspects, variable transmission rates, it capture persistence memory effects, accounting past trajectory epidemic, and also providing a more accurate explanation dynamics. author study has formulated fractional order model by dividing total population into five sub-groups namely susceptible group, exposed moderately corrupted highly repented group. In qualitative analyses section this has: shown solutions existence uniqueness applying well-known Picard–Lindelöf criteria, computed basic reproduction number using next generation approach, equilibrium points investigated their stabilities, re-formulated corresponding optimal control problem proposed three time-dependent controlling variables (prevention measure, moderate treatment measure high measure). necessary optimality conditions strategies are derived presented Pontryagin's Maximum Principle. Eventually, demonstrated effectiveness combinations through numerical methods (simulations) analysis results shows that implementation significantly minimizes individuals in community.

Language: Английский

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Neural Network Model Using Levenberg Marquardt Backpropagation Algorithm for the Prandtl Fluid Flow Over Stratified Curved Sheet

IEEE Access, Journal Year: 2024, Volume and Issue: 12, P. 102242 - 102260

Published: Jan. 1, 2024

Artificial intelligence has proliferated across numerous fields of study as a result its rapid and accurate response times. Its application in fluid dynamics for optimization computational training numerical outcomes been remarkably significant. In the current investigation, neural network model is constructed to analyze propagation Prandtl curved, stretched surface that subjected radiation comprises porous media. The interaction between homogeneous heterogeneous chemical reactions, magnetic field, thermal stratification, second-order slip at boundary are all factors under consideration. solutions resulting equations trained validated using fitting tool Runge Kutta Fehlberg 4th 5th order method. A total 15% data designated testing validation, whereas 70% it utilized training. Levenberg Marquardt algorithm employed assess functioning through regression analysis mean squared error. addition, square error estimated be 10-8 10-6. Additionally, elastic parameter decreased velocity while increased velocity. relaxation reduced temperature, non-linear stretching index enlarged solute profile. As result, this research shows artificial networks can serve substitute long-term computation prediction. However, model's flow structure guide creating an optimal industrial design.

Language: Английский

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