Assessment the thermal performance of square twisted double tube heat exchanger with Al2O3 nanofluid
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Ali K. Abdul Razzaq
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Khudheyer S. Mushatet
Abstract
The effect of a twisting parameter on heat transport in a square-sectioned twisted tube was studied. One definition of a twisting parameter is the ratio of the hydraulic diameter to the length of the tube at the point when it completed a full 360-degree twist. The twist parameters that were selected are 5, and they were compared to the Double Twisted Square Tube heat exchanger (DTSTHE). Transient flow was taken into account when evaluating the sets of Reynolds numbers. On the other hand, there are four different concentration volumes of nano fluid amounts of 0.005, 0.01, 0.025, and 0.04 for turbulent flow, and the Reynolds number ranges from 5,000 to 25,000. An examination was conducted into the effect of the twist parameter on the convective heat transfer coefficient through turbulent flow. The finite volume approach and the conventional − turbulence model were used to conduct numerical simulations of three-dimensional, steady-state incompressible flow in body-fitted coordinates. It was found that as the twist parameter is decreased, the heat transmission coefficient increases. What this means for the created span-wise swirling flow is unclear. With increasing distance from the tube center towards the walls, the whirling causes the cross-flow velocity vectors to increase. The boundary layer has good thermal properties because it thins out at the tube wall as the near-wall velocity increases. Internal thermal balance is further improved by spinning since it increases the mixing process. A higher Reynolds number, along with larger velocity components, results in a higher heat transfer coefficient.
Acknowledgments
This work is supported by Khudheyer S. Mushatet. One of the authors is grateful to the Supervisor of Scientific Research for his continuous support.
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: No.
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Research funding: None declared.
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Data availability: Not applicable.
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Artikel in diesem Heft
- Frontmatter
- Review
- Computational chemistry unveiled: a critical analysis of theoretical coordination chemistry and nanostructured materials
- Research Articles
- Reducing sludge formation by enhancing biological decay of biomass: a mathematical model
- Numerical investigation of discharge pressure effect on steam ejector performance in renewable refrigeration cycle by considering wet steam model and dry gas model
- Natural pigment indigoidine production: process design, simulation, and techno-economic assessment
- Energy efficiency in cooling systems: integrating machine learning and meta-heuristic algorithms for precise cooling load prediction
- A parametric study on syngas production by adding CO2 and CH4 on steam gasification of biomass system using ASPEN Plus
- Temperature optimization model to inhibit zero-order kinetic reactions
- Multi-objective Bonobo optimisers of industrial low-density polyethylene reactor
- Assessment the thermal performance of square twisted double tube heat exchanger with Al2O3 nanofluid
- Short Communication
- Layouts and tips for a typical final-year chemical engineering graduation project
