The Impact of Circular Holes in Twisted Tape Inserts on Forced Convection Heat Transfer

Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 1005 - 1012

Published: Oct. 16, 2024

This study investigated heat transfer and friction characteristics in a forced convection system using wavy twisted tape inserts with circular holes. The inserts, twist ratios (TR) of 8.5, 7.5, 6.5, were placed inside test pipe to create turbulent flow. tapes measured 700 mm length 18 width, while the had an outer diameter 35 inner 30 mm, section mm. Airflow rates adjusted achieve different bulk mean temperatures. Experimental data used develop new correlations for Nusselt number factor. Reynolds (Re) ranged from 4,000 14,000. Comparisons between varying pitches smooth tube showed that highest rate was achieved ratio 6.5.

Language: Английский

---

Optimizing Aerofoil Design: A Comprehensive Analysis of Aerodynamic Efficiency through CFD Simulations and Wind Tunnel Experiments

Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 713 - 724

Published: Sept. 17, 2024

This study explores the aerodynamic properties of different aerofoil shapes and their performance under varying flow conditions to identify most efficient design based on lift-to-drag ratio, stall behaviour, overall efficiency. Using Computational Fluid Dynamics (CFD) simulations, several profiles were analysed at angles attack speeds. These simulations validated through wind tunnel experiments, offering a comprehensive understanding in real-world scenarios. The combination CFD analysis testing enabled thorough assessment each shape, leading discovery specific with high ratio stable attack. results have significant implications for wings blades aerospace aeronautical applications, improving fuel efficiency both aviation energy sectors. Additionally, dynamic roughness shows potential reducing separation bubbles, but further investigation is needed assess its effectiveness higher elevated Reynolds numbers. Understanding scalability practical application scenarios essential. Current research surface modifications like dimples riblets lacks optimized configurations conditions. More understand interaction between geometries boundary layer, particularly Combining experimental numerical methods can provide control techniques. limited applying strategies turbine indicates opportunity improve Future studies should focus optimizing multiple techniques addressing challenges, such as durability, cost-effectiveness, integration into existing systems. Investigating cost-effectiveness durability these long-term use will be vital successful adoption industry. Expanding include effects environmental factors temperature humidity offer more complete various operating By gaps, advancements achieved, benefiting

Language: Английский

---

Enhancement in Heat Transfer with Nanofluids in Double-Pipe Heat Exchangers

Journal of Mines Metals and Fuels, Journal Year: 2025, Volume and Issue: unknown, P. 165 - 172

Published: Jan. 7, 2025

This study investigates the potential of using nanofluids, specifically those composed water and Titanium Dioxide (TiO2) nanoparticles, to enhance thermal performance a double-pipe copper heat exchanger. By incorporating varying concentrations TiO2 nanoparticles (0.1%, 0.3% 0.5%) into water, researchers aimed improve fluid's conductivity viscosity. The experimental results demonstrated that addition led significant increase in overall transfer rate. highest rate was achieved at nanoparticle concentration 0.3%, indicating an optimal balance between enhanced properties flow resistance. However, slight decrease observed 0.5%, suggesting higher may not necessarily lead further improvements. revealed substantial 23% improvement efficiency exchanger when nanofluid. enhancement is attributed improved nanofluid, which allows for more efficient hot cold fluids. In conclusion, findings this research strongly suggest TiO2/water nanofluids can significantly exchangers. carefully optimising conditions, it possible achieve gains while minimising drawbacks such as increased pressure drop. Major Findings: explored use transfer, with leading efficiency. concentrations, improving conductivity, drop, potentially offsetting benefits.

Language: Английский

---

Integrated Approach to Enhance Vehicle Safety: A Novel Bumper Design with Energy-Absorbing Mechanisms

Journal of Mines Metals and Fuels, Journal Year: 2025, Volume and Issue: unknown, P. 27 - 35

Published: Jan. 7, 2025

This research focuses on improving vehicle safety by developing a new spring-based energy absorption system for the front bumper of Bolero vehicle. The goal is to reduce severity frontal collisions absorbing significant portion impact energy. proposed comprises helical compression spring, mounting bracket, and chassis member. design aims absorb 30-35% impact, reducing deceleration rate minimizing shock transmitted passenger cabin. To visualize estimate its capabilities, 3D CAD model analytical calculations have been performed. Further analysis using finite element methods will provide more detailed understanding deformation behaviour as well capacity absorbing. Future work involve refining design, conducting analysis, evaluating performance through rigorous testing. has potential significantly enhance mitigate risks associated with collisions. Major Findings: A novel was 30-35 %. Finite conducted assess system's capacity. four-damper demonstrated 42.44% reduction in maximum compared plain bumper. safety.

Language: Английский

---

Automating the Two-Dimensional Design of Heating, Ventilation, Air Conditioning, and Refrigeration (HVACR) Ducts using Computer Programming Language: An Algorithmic Approach

Journal of Mines Metals and Fuels, Journal Year: 2025, Volume and Issue: unknown, P. 211 - 220

Published: Jan. 7, 2025

This paper reports on designing an automated two-dimensional duct of Heating, Ventilation, Air Conditioning and Refrigeration (HVACR) using computer programming. The designed system uses algorithmic approach attempting to accelerate the design process, decrease human error designers make process HVACR systems more efficient. It applies a interacting algorithms solve sizing, routing layout optimisation tasks. facilitates both saving time increment accuracy consistency in final design. By applying advanced computational techniques, it could analyse complex geometries buildings easily produce optimised designs for ducts. research contributes field engineering by providing practical solution automating critical phase. automation may be configured work with existing Computer Aided Design (CAD) software, allowing close collaboration between engineers. Major Findings: A program Hyper Text Markup Language (HTML), Cascading Style Sheets (CSS) JAVA allows quick accurate determination size standard empirical formulas that relate height, width, diameter. programmer can effortlessly adjust simply modifying input data tailoring specifications meet specific requirements.

Language: Английский

---

Thermal Performance Analysis of Electronic Components on Different Substrate Materials

Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 1093 - 1098

Published: Oct. 30, 2024

This study numerically analyzed different substrate board materials, including FR4, silicon, and copper, for electronic component cooling. Ten diverse components were mounted on these boards subjected to uneven heat distribution. Both natural forced air cooling tested at various speeds. Copper cladding significantly lowered temperatures by 34-54 degrees Celsius compared FR4 or silicon 7 m/s. Moreover, copper allowed lower fan speeds (5 m/s) while keeping below 100 Celsius, reducing energy consumption. These results offer valuable guidance thermal engineers in selecting optimal efficient

Language: Английский

---

State-of-the-Art Cooling Solutions for Electronic Devices Operating in Harsh Conditions

Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 843 - 861

Published: Sept. 27, 2024

The ongoing push for miniaturization and increased computational power in electronic devices has intensified thermal management challenges, especially harsh environments with extreme heat, moisture, vapour, dust, vibration. This paper provides a comprehensive analysis of both direct indirect cooling methods, focusing on heat transfer efficiency, optimization techniques, practical applications. It emphasizes the critical importance maintaining performance, reliability, durability systems under tough conditions. review explores advanced materials technologies, including role Thermal Interface Materials (TIMs) prolonging lifespan Integrated Circuits (ICs) use Phase Change (PCMs) substrate boards versatile management. also discusses effectiveness Liquid Cold Plates battery module potential micro-channel liquid Switching Mode Power Supplies (SMPS) boards. By offering detailed insights into design principles, guides engineers optimizing IC chip placement improving system reliability. Additionally, it examines evolution traditional rise innovative techniques like thermoelectric cooling, impact advancements materials, design, manufacturing energy efficiency environmental sustainability. highlights promising research areas emerging contributing to development more efficient, reliable, eco-friendly solutions environments.

Language: Английский

---

Numerical and Experimental Investigation of the Effect of Overlapping Angle on Strength and Deformation of Curved Plate Joined Using Arc Welding Process

Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 1059 - 1066

Published: Oct. 30, 2024

This research presents a comprehensive numerical and experimental investigation into the influence of overlapping angles from 30° to 100° with 5° increment on mechanical strength deformation behaviour curved plates joined using arc welding process. study employs Finite Element Analysis (FEA) simulate process assess stress distribution across welded joint. The simulations complemented by trials; wherein at varying welding. Mechanical tests, including tensile bending conducted evaluate joint characteristics. results reveal significant impact angle joint's performance. Specifically, an optimal identified, which maximizes while minimizing deformation. findings contribute better understanding for offer practical guidelines optimizing design in engineering applications.

Language: Английский

---

Enhancing Smartphone Circuit Cooling: A Computational Study of PCM Integration

Journal of Advanced Research in Numerical Heat Transfer, Journal Year: 2024, Volume and Issue: 27(1), P. 132 - 145

Published: Nov. 30, 2024

Modern smartphones are used for a wide range of demanding tasks, such as gaming, high-resolution photography, and internet browsing, which significantly increases their power consumption. This excessive use leads to higher heat generation within the device, typically between 2 6 watts. To manage this maintain optimal performance, employ various cooling techniques. A new mobile method could innovative approaches like advanced phase change materials, liquid systems, or emerging technologies thermoelectric microfluidic cooling. paper proposes using materials. approach leverages material's ability absorb by transitioning from solid state vicecersa. helps keep device's temperature below 45 degrees Celsius. In mid-range smartphones, methods natural convection, indirect heat-pipe cooling, forced convection commonly used, but these often fail under high-power usage conditions.

Language: Английский

---

Influence of Plate Thickness on the Mechanical Behaviour of Mild Steel Curved Plates: An Experimental Study

Journal of Mines Metals and Fuels, Journal Year: 2024, Volume and Issue: unknown, P. 1319 - 1327

Published: Dec. 11, 2024

This paper aims to investigate the influence of plate thickness on strength, failure load and deformation behaviour mild steel curved plates. Experimental tests were conducted plates with varying thicknesses, subjected static loading conditions. The ultimate load, deflection modes recorded analysed. Results indicate a significant relationship between mechanical properties. Thicker exhibited higher load-carrying capacity different patterns than thinner Major Finding: findings provide valuable insights for designing optimising structures in various engineering applications.

Language: Английский

---