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131 articles for “Convection”
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Atmospheric Boundary Layer Processes: Impacts on Weather Patterns and Climate Change
Abstract: The atmospheric boundary layer (ABL) is a vital component of the Earth's climate system, acting as the interface between the terrestrial surface and the overlying atmosphere. This layer, typically extending from the surface to a height of a few hundred meters, is characterized by strong gradients in meteorological variables such as temperature, humidity, wind speed, and atmospheric pressure. Understanding the dynamics of the ABL is essential for comprehending weather phenomena, …
Published in International Journal of Atmosphere · Vol. 1, Issue 2, 2024 · pp. 22–25 Read article
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Heat Transfer by Arc Welding for A Similar Material Joint
Abstract: Electric arc welding (EAW) is a traditional fabrication process used in wider domestic, commercial and industrial application. Welding is a joining of two materials with the application of heat at the molecular level with the application of heat and pressure. Many materials used for welding application for different joining process. Maraging steel is special steel used for production of different air-craft components. Maraging material is used for heavy tools, producing …
Published in Journal of Materials & Metallurgical Engineering · Vol. 15, Issue 2, 2025 · pp. 1–13 Read article
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Improving Indoor Room Air Conditioning Using PID Control
Abstract: Energy use in building air conditioning contributes significantly to power demand; therefore, in this work, we propose an improved methodology to achieve comfort conditions through PID control assistance. The project develops a mathematical model based on analytical heat transfer equations for comfort conditions by fulfilling the Fanger equation, considering environmental parameters (ambient temperature), metabolic rate, and people’s physical activity (internal heat generation) to reduce power consumption and improve energy efficiency. …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 12, Issue 1, 2025 · pp. 1–21 Read article
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Enhanced Heat Transfer in Double Pipe Heat Exchanger with Circular Fins Using Copper Nanofluid and Twisted Tape Inserts: A Computational Study
Abstract: The enhancement of convective heat transfer in a double-pipe heat exchanger utilizing circular finned twisted tape inserts and helical screw-tapes with centre rods, in conjunction with copper oxide nanofluid as the heat transfer medium was studied in this project. Computational Fluid Dynamics (CFD) simulations were conducted across Reynolds numbers ranging from 500 to 5000 to analyse heat transfer characteristics. The investigation focuses on Nusselt number improvement and friction factor analysis …
Published in Journal of Thermal Engineering and Applications · Vol. 12, Issue 1, 2025 · pp. 11–22 Read article
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Experimental Investigation on Heat Transfer Enhancement in Shell and Tube Heat Exchanger Using Graphene Nanofluids
Abstract: The paper focuses on the dispersion of Graphene nanoparticles in a water–ethylene glycol based fluid to investigate their impact on the convective heat transfer performance of the resulting nanofluid. Various concentrations of graphene nanoparticles were prepared, and the nanofluids were subjected to different ultrasonication durations to ensure proper dispersion and stability of the nanoparticles within the base fluid. The study involved extensive experimental evaluation to systematically analyze how the nanoparticle …
Published in Journal of Automobile Engineering and Applications · Vol. 12, Issue 3, 2025 · pp. 32–38 Read article
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Thermal Performance Analysis and Optimization of Pin-Fin Heat Sink Using CFD, Taguchi Method, and Machine Learning
Abstract: Efficient thermal management is essential for improving the performance and reliability of modern engineering systems and electronic devices. This study presents the design, simulation, and optimization of a pin-fin heat sink using SolidWorks for three-dimensional modeling and ANSYS for thermal and computational fluid dynamics (CFD) analysis. Four different pin-fin geometries, namely square, pentagon, octagon, and circular fins, are considered to evaluate their thermal performance under varying operating conditions. Aluminum is …
Published in Trends in Mechanical Engineering & Technology · Vol. 16, Issue 2, 2026 · pp. 8–20 Read article
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SYMMETRY AND ASYMMETRY MODEL FOR THERMAL CONDUCTIVITY IN POROUS MEDIA
Abstract: This paper focuses on determining thermal conductivity in porous media using symmetry and asymmetry models. Since porous media are not uniform and homogeneous in most of the cases, anisotropy must be taken into account, what derives in the application of an asymmetry model as thermal gradients are not equal in all directions. The paper demonstrates that, under certain conditions, isotropic conditions, therefore, symmetry model can be applied to non-homogeneous or …
Published in Journal of Geotechnical Engineering · Vol. 7, Issue 2, 2020 · pp. 38–51 Read article
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Theoretical modelling of heat transfer in non-homogeneous porous media
Abstract: The paper is focused on the study and analysis of heat transfer in geothermal substrates made up of non-homogeneous porous media. The paper analyses the influence of porosity on the heat transfer as a result of the combination of conduction and convection mechanisms that take place in non-homogeneous porous materials. As a result of the combined effect heat transfer is not homogeneously distributed throughout the cross section of the geothermal …
Published in Journal of Geotechnical Engineering · Vol. 9, Issue 2, 2022 · pp. 44–51 Read article
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Monocrystalline Silicon Growth using the Process of Vibroturbulization
Abstract: Solar panels are powered by photovoltaic cells that capture solar energy and convert it into electrical current. Solar cells are a solar panel made from homogeneous single-crystal silicon. The cultivation of single-crystal silicon is carried out by the Czochralski method, in which, when a crystalline seed is injected onto the surface of a silicon melt, the atoms of which, when in contact with the seed, lose energy in the form …
Published in Journal of Materials & Metallurgical Engineering · Vol. 13, Issue 1, 2023 · pp. 27–33 Read article
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A Thermal Review and Simulation of An Earth Tube Heat Exchanger
Abstract: AbstractConventional energy is the renewable source of energy. It is the best source of energy and free in nature also in abundance. At the present situation, heating and cooling is a major concern in environment due to global warming. Air conditioning systems has been developed to resolve major part of energy is being engaged in such issues. So, Earth tube heat exchanger is a renewable source of energy for heating …
Published in Journal of Nuclear Engineering & Technology · Vol. 9, Issue 3, 2019 · pp. 1–10 Read article
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A Thermal Review and Simulation of Renewable Tube Heat Exchanger – A Review
Abstract: AbstractRenewable energy is the conventional source of energy. It is the endless source of energy and quality available in nature. At the present scenario, heating and cooling is a major concern in environment due to global warming. Air conditioning systems has been developed to resolve major part of energy is being engaged in such issues, which also causes global warming. Renewable tube heat exchanger is a renewable source of energy …
Published in Journal of Nuclear Engineering & Technology · Vol. 10, Issue 2, 2020 · pp. 9–17 Read article
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Thermal Instability in a Second-Order Fluid under the Effects of Suction-Injection-Combination and Maxwell-Cattaneo Law
Abstract: AbstractThe onset of Rayleigh-Bénard convection in a Second-Order fluid under the effects of Suction-Injection-Combination and Maxwell-Cattaneo Law is studied. The classical Fourier law is replaced with the Non-Classical Maxwell-Cattaneo heat flux law in the energy equation. A linear stability analysis is performed to obtain the eigenvalues for free-free isothermal boundary conditions. The influence of the parameters like Cattaneo number, Prandtl number, and Visco-elastic parameter has been analysed and found that …
Published in Recent Trends in Fluid Mechanics · Vol. 5, Issue 1, 2018 · pp. 75–85 Read article
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Fin-Set Materials Analysis for Heat Removal Utilizing ANSYS
Abstract: Present paper deals with the effect of fin material on heat transfer from fin for electronics device cooling. Electronic tools discharge heat in the course of the work; that discharged heat should be removed either by passive or active ways. Current work stresses on passive (natural) way of cooling. Natural cooling can be done either by free air or fin. Different types of fin materials have been studied in the …
Published in Journal of Advancements in Robotics · Vol. 3, Issue 1, 2016 · pp. 24–30 Read article
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Numerical Study on Heat Transfer Enhancement of Laminar Flow through a Circular Tube with Artificial Rib Roughness
Abstract: This work presents the configuration optimization of a typical square roughness in a circular tube for laminar heat transfer in air using computational fluid dynamics (CFD) modelling. Conjugate heat transfer 2D numerical model has been developed and successfully carried out. CFD numerical simulations were carried out to analyze the flow and heat transfer in the air duct of a solar air heater provided with rectangular ribs. The laminar flow model …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 1, Issue 3, 2014 · pp. 14–19 Read article
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The Effect of Sonication Time on Alumina Nanofluids with Paradoxical Behavior
Abstract: Nanofluids can be considered to be the next-generation heat transfer fluids as they offer exciting new possibilities to enhance heat transfer performance compared to pure liquids. Heat transfer enhancement using nanofluids have been reported in literature pertinent to thermal conductivity under the static conditions, convective heat transfer and phase change heat transfer. Except for the studies from the first category where the nanofluids exhibited much higher thermal conductivities than those …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 16, Issue 3, 2014 · pp. 31–40 Read article
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Numerical Formulation of Solidification of Aluminum Casting in 2-D Green Sand Mould
Abstract: Unsteady numerical simulation of steady state and unsteady state conduction heat transfer has been done for solidification of pure Aluminium in green sand mould. As during the solidification heat transfer by conduction will dominate over convection and radiation. Heat conduction equation in two-dimensional Cartesian co-ordinate governs the problem. Convective boundary condition has been considered at the interface of the casting part and mould cavity. Heat conduction equation in unsteady state …
Published in Trends in Mechanical Engineering & Technology · Vol. 5, Issue 3, 2015 · pp. 38–41 Read article
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Thermosolutal Instability of Partially Ionized Plasma in Porous Medium in Presence of Finite Larmor Radius and Hall Currents Effect
Abstract: The effects of finite Larmor radius (FLR), collisions, and Hall currents are investigated on thermosolutal instability of a partially ionized plasma in porous medium in the presence of a uniform vertical magnetic field. In the case of stationary convection, finite Larmor radius, Hall currents, medium permeability and magnetic field may have stabilizing or destabilizing effects but for a certain wave number range, FLR, magnetic field and Hall currents have stabilizing …
Published in Journal of Experimental & Applied Mechanics · Vol. 3, Issue 1, 2012 · pp. 32–46 Read article
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Studies on Effect of Varying Geometric Parameters of Solar Receiver Tube on Thermal Loss Suffered By It
Abstract: AbstractThe radiative and convective heat losses from a solar receiver tube at a given operating temperature are a function of temperature of the outer glass envelope and outer surface area of the glass envelope. But the temperature of the outer glass envelope and its outer surface area are themselves a function of outer diameter of the heat pipe enclosed within the glass envelope and the annular gap between the outer …
Published in Research & Reviews : Journal of Physics · Vol. 4, Issue 1, 2015 · pp. 10–21 Read article
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Effect of Atmospheric Aerosol on Lightning Activity Over North East India
Abstract: The observations of the lightning activity variation from 1998 to 2011 due to atmospheric aerosol effect over the North East India have been reported here. It has been observed that the lightning activity increases very rapidly in this region with a rate of 867 lightning flashes per year. Lightning activity over this region mainly occurs in two periods—March to June and August to October every year. As the higher lightning …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 3, Issue 2, 2014 · pp. 1–7 Read article
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Liquid-Cooled Battery Thermal Management System: A Numerical Investigation of Effect of Coolant Path and Flow Rate Optimization
Abstract: Battery thermal management system (BTMS) is crucial for ensuring the safety and performance of battery packs in electric vehicles. Liquid cooling is one of the most effective methods for BTMS, but the choice of coolant, fluid path and its flow rate can affect the heat transfer efficiency and the pressure drop. In this paper, a numerical simulation of a liquid-cooled BTMS using three designs with water as a coolant has …
Published in Journal of Polymer & Composites · Vol. 11, Issue 8, 2023 · pp. 11–18 Read article