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Uncoupling Coriolis Force and Rotating Buoyancy Effects on Full-Field Heat Transfer Properties of a Rotating Channel
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Efficient Heat Transfer Augmentation in Channels with Semicircle Ribs and Hybrid Al2O3-Cu/Water Nanofluids
Hussein Togun1,2, Raad Z Homod3, Zaher Mundher Yaseen4,5,6
1Department of Biomedical Engineering, University of Thi-Qar, Nassiriya 64001, Iraq.
Nanomaterials (Basel, Switzerland)
|August 12, 2022
Summary
This study enhances heat transfer in channels using hybrid nanofluids and semicircle ribs. Higher concentrations and flow rates significantly boost thermal performance, creating beneficial recirculation zones.
Area of Science:
- Thermal Engineering
- Fluid Dynamics
- Nanomaterials
Background:
- Rising energy consumption and climate challenges necessitate improved heating and cooling system efficiency.
- Researchers explore modifying process parameters, optimizing design, and using high-performance fluids for thermal efficiency.
Purpose of the Study:
- To investigate heat transfer enhancement in a channel using hybrid Al2O3-Cu/water nanofluids with semicircle ribs.
- To analyze the impact of varying rib geometries and nanofluid concentrations on turbulent flow performance.
Main Methods:
- Utilized a finite volume approach with a k-ω shear stress transport turbulence model for computer simulations.
- Simulated turbulent flow regimes (Re: 10,000–25,000) with varying rib dimensions and Al2O3-Cu/water concentrations (0.33%–2%).
Main Results:
- Ribs significantly enhanced heat transfer; Nusselt number increased with nanofluid concentration and Reynolds number.
- Maximum heat transfer was observed at 2% Al2O3-Cu/water concentration and Re=25,000.
- Recirculation zones formed around ribs, increasing thermal performance with a higher number of ribs.
Conclusions:
- Hybrid nanofluids and semicircle ribs effectively improve thermal efficiency in turbulent channel flow.
- Optimized rib design and nanofluid concentration are crucial for maximizing heat transfer enhancement.
- The study demonstrates a viable approach for developing more efficient thermal management systems.
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