Assessment Improvement of Heat Performance and Hydraulic Thermal Flow in a Three‐Dimensional Tube Equipped With Different Turbulator Corrugated Arrangements

Heat Transfer, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

ABSTRACT Corrugated pipe is used in many engineering applications because of its high performance compared with smooth pipe. This research involved numerical simulations and experimental testing a circular tube modified flow path to improve the heat transfer exchangers. The focus was on enhancing mixing creating vortex flows within increase exchange efficiency. impact seven design factors, including ring diameters (RD) pitch between pitches (RP), thermal–hydraulic investigated. Water as working fluid regime ranges from 4000 15,000, indicating turbulent flow. A constant flux 25,500 W/m 2 applied, water enters system at temperature 298 K (25°C). properties are assumed remain throughout conditions, such steady state (the conditions do not change time), incompressible density remains constant), no‐slip condition velocity surface any solid boundary zero). tubes consistently outperformed due increased separation. Both increasing Reynolds number decreasing factors led formation patterns. In RD configurations, Nusselt saw an average improvement approximately 45.6%, while friction factor 19% 57%. RP configurations demonstrated broader range enhancements, reaching up 35%, increases ranging 15% 42%. Rings can significantly enhance tubes. However, best configuration depends specific application. highest performance, resulting 1.38 evaluation factor, obtained using 1 mm 20 mm. simulated data showed excellent agreement, maximum discrepancy less than 11% for both dimpled

Language: Английский

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Numerical Enhancement of Forced Convection Heat Transfer Characteristics for Skewed Wavy Channel Partially Inserted With Copper Metal Foam

Heat Transfer, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

ABSTRACT In this paper, the convective heat transfer (HT) and airflow characteristics are numerically examined for skewed wavy rectangular channels inserted partially with copper metal foam. Calculations were performed using ANSYS Fluent 19.2 at a laminar range of Reynolds number from 700 to 1700. The thermohydraulic performance (THP), friction factor ( f ), average Nusselt Nu avg ) variation Re foam heights h mf = 0.2–0.3 H pore densities 10, 20, 30 40 pores per inch (PPI) have been tested channels. results indicated that partial inserts enhance temperature distribution increase HT rate inside channel due large surface area, high‐thermal conductivity copper, increased flow resistance, which increases velocity fluid passing through exchange system. Also, increasing , PPI, improves in channel, leading an both decreased permeability. addition, under constant conditions, THP exhibited rise when PPI increased. Furthermore, value lowers grows high restriction. At 0.2 1700, reaches maximum 1.51.

Language: Английский

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Investigating the influence of inlet/outlet arrangements and flow direction on the hydro-thermal performance of a multi-minichannel cold plate

International Journal of Heat and Fluid Flow, Journal Year: 2024, Volume and Issue: 110, P. 109647 - 109647

Published: Nov. 7, 2024

Language: Английский

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Numerical investigation of the hydrothermal performance in novel cooled panels with flow-guided pin fins and secondary channels for reusable launch vehicles

Energy, Journal Year: 2025, Volume and Issue: unknown, P. 135991 - 135991

Published: April 1, 2025

Language: Английский

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Extensive Investigation of Hydrothermal Flow and Heat Performance Improvement in a 3D Tube Based on Varying Concavity Dimple and Corrugation Turbulator Configurations

Heat Transfer, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

ABSTRACT This study explored the influence of geometric parameters on corrugated tube heat exchangers under turbulent flow conditions. Eighteen different configurations were evaluated using both numerical simulations and experimental methods. The simulations, ranging from Reynolds numbers 4000 to 15,000, analyzed various diameters, shapes, disturbances. Results demonstrated that dimpled significantly enhanced transfer compared with smooth tubes. best performance, a pressure drop efficiency 1.41 at number 4000, was achieved 2‐mm dimples spaced 20 mm apart in an in‐line pattern. Validation results against data high level accuracy. maximum deviation for Nusselt 12% tubes 15% friction factor 6.1% 8.3% model accurately represented full dimensions commercial exchanger. Grid independence tests conducted three‐dimensional unstructured. To ensure accurate results, used tetrahedral mesh Realizable k – ε turbulence its simulations. findings revealed ring dimple dramatically transfer. Specifically, diameter rings, distance between dimpled‐ring rings enhancements 45.5%, 35.009%, 67.95%, 58.42%, respectively. Furthermore, diameters distances also outperformed tubes, showing increases 42% 38.8%. optimized design offers promising approach improving exchanger performance while minimizing drop. Future research can build upon these further refine optimize technology.

Language: Английский

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A Numerical Investigation of the Impact of Converging/Diverging Curved Channel Configuration on the Multi‐Channel Cold Plate Hydrothermal Performance

Heat Transfer, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

ABSTRACT With the advancement of modern electronics and increase in thermal power density, heat management has become a challenge that impacts device performance. Cold plates are an effective solution liquid cooling systems, improving dissipation stability. This study presents numerical evaluation multichannel cold plates' hydraulic performance to enhance their overall efficiency. Geometric modifications included dual ports for improved flow distribution, transfer, channel structure changes, such as straight, convergent, divergent, convergent/divergent configurations. Performance was assessed through temperature pressure drop, efficiency analysis using ANSYS Fluent 22R1 under incompressible laminar conditions with water mass rates between 0.002 0.006 kg/s. Compared conventional multi‐mini‐channel plate (CMMCP), results this showed flow‐splitting effect at outlet significantly compared single outlet. Using one inlet two outlets achieved higher CMMCP, reducing loss by 61% Nusselt number 14.4%. Furthermore, modifying convergent curve central had greater impact on than divergent–convergent curve. Narrowing increased 48.71% design, while also temperature. The double‐outlet, convergent‐curved design performed best performance, achieving highest fluid rates, 1.81.

Language: Английский

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