Numerical study of turbulent flow and heat transfer in a novel design of serpentine channel coupled with D-shaped jaggedness using hybrid nanofluid
This study aimed to examine numerically the effects of a dimpled surface over a mini-channel heat exchanger on the flow characteristics and heat transfer across a serpentine channel with a uniform rectangular cross-section. The dimples were arranged in parallel with a spanwise (y/d) distance of 3.12...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-04-01
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| Series: | Alexandria Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016823000856 |
| _version_ | 1797860236275482624 |
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| author | Raditun E. Ratul Farid Ahmed Syed Alam Md. Rezwanul Karim Arafat A. Bhuiyan |
| author_facet | Raditun E. Ratul Farid Ahmed Syed Alam Md. Rezwanul Karim Arafat A. Bhuiyan |
| author_sort | Raditun E. Ratul |
| collection | DOAJ |
| description | This study aimed to examine numerically the effects of a dimpled surface over a mini-channel heat exchanger on the flow characteristics and heat transfer across a serpentine channel with a uniform rectangular cross-section. The dimples were arranged in parallel with a spanwise (y/d) distance of 3.125 and streamwise (x/d) distance of 11.25 along just one side of the serpentine channel's surface. Turbulent flow regime with Reynolds number ranging from 5 × 103 to 20 × 103 in the channel with the surface modification was studied using water and various volume concentrations (φ = 0.1%, 0.33%, 0.75%, 1%) of Al2O3-Cu/water hybrid nanofluid as the coolant to achieve a three-step passive heat transfer enhancement. Applying the Finite Volume Method (FVM), RNG k-e turbulence model, and a constant heat flux of 50 kW/m2, simulations were run assuming the mixture of Al2O3-Cu nanoparticles homogenous using ANSYS 2020 R1. The second-order upwind approach is used for approximation of solution and discretization with SIMPLE pressure–velocity coupling. Taking heat transfer increment and pressure drop penalty into consideration, the dimpled serpentine channel provides a 1.47-times improvement in thermal efficiency using water as the coolant, and the dimpled channel with 1% vol. Al2O3-Cu/water nanofluid enhanced thermal efficiency by a remarkable maximum of 2.67-times at Re 5 × 103. The study also indicates that thermal efficiency increased with an increasing volume concentration of the nanofluid and increment in thermal efficiency gradually decreased as the Re increased. |
| first_indexed | 2024-04-09T21:42:15Z |
| format | Article |
| id | doaj.art-b1a7d8fc0c564c34a576951816cb82c8 |
| institution | Directory Open Access Journal |
| issn | 1110-0168 |
| language | English |
| last_indexed | 2024-04-09T21:42:15Z |
| publishDate | 2023-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj.art-b1a7d8fc0c564c34a576951816cb82c82023-03-26T05:15:54ZengElsevierAlexandria Engineering Journal1110-01682023-04-0168647663Numerical study of turbulent flow and heat transfer in a novel design of serpentine channel coupled with D-shaped jaggedness using hybrid nanofluidRaditun E. Ratul0Farid Ahmed1Syed Alam2Md. Rezwanul Karim3Arafat A. Bhuiyan4Department of Mechanical and Production Engineering, Islamic University of Technology (IUT), Board Bazar, Gazipur 1704, BangladeshDepartment of Nuclear Engineering, North Carolina State University, Raleigh, NC, USANuclear Engineering and Radiation Science, Missouri University of Science and Technology, Rolla, USADepartment of Mechanical and Production Engineering, Islamic University of Technology (IUT), Board Bazar, Gazipur 1704, BangladeshDepartment of Mechanical and Production Engineering, Islamic University of Technology (IUT), Board Bazar, Gazipur 1704, Bangladesh; Corresponding author.This study aimed to examine numerically the effects of a dimpled surface over a mini-channel heat exchanger on the flow characteristics and heat transfer across a serpentine channel with a uniform rectangular cross-section. The dimples were arranged in parallel with a spanwise (y/d) distance of 3.125 and streamwise (x/d) distance of 11.25 along just one side of the serpentine channel's surface. Turbulent flow regime with Reynolds number ranging from 5 × 103 to 20 × 103 in the channel with the surface modification was studied using water and various volume concentrations (φ = 0.1%, 0.33%, 0.75%, 1%) of Al2O3-Cu/water hybrid nanofluid as the coolant to achieve a three-step passive heat transfer enhancement. Applying the Finite Volume Method (FVM), RNG k-e turbulence model, and a constant heat flux of 50 kW/m2, simulations were run assuming the mixture of Al2O3-Cu nanoparticles homogenous using ANSYS 2020 R1. The second-order upwind approach is used for approximation of solution and discretization with SIMPLE pressure–velocity coupling. Taking heat transfer increment and pressure drop penalty into consideration, the dimpled serpentine channel provides a 1.47-times improvement in thermal efficiency using water as the coolant, and the dimpled channel with 1% vol. Al2O3-Cu/water nanofluid enhanced thermal efficiency by a remarkable maximum of 2.67-times at Re 5 × 103. The study also indicates that thermal efficiency increased with an increasing volume concentration of the nanofluid and increment in thermal efficiency gradually decreased as the Re increased.http://www.sciencedirect.com/science/article/pii/S1110016823000856CFDSerpentine channelHeat transfer enhancementHybrid nanofluidDimplePEC |
| spellingShingle | Raditun E. Ratul Farid Ahmed Syed Alam Md. Rezwanul Karim Arafat A. Bhuiyan Numerical study of turbulent flow and heat transfer in a novel design of serpentine channel coupled with D-shaped jaggedness using hybrid nanofluid Alexandria Engineering Journal CFD Serpentine channel Heat transfer enhancement Hybrid nanofluid Dimple PEC |
| title | Numerical study of turbulent flow and heat transfer in a novel design of serpentine channel coupled with D-shaped jaggedness using hybrid nanofluid |
| title_full | Numerical study of turbulent flow and heat transfer in a novel design of serpentine channel coupled with D-shaped jaggedness using hybrid nanofluid |
| title_fullStr | Numerical study of turbulent flow and heat transfer in a novel design of serpentine channel coupled with D-shaped jaggedness using hybrid nanofluid |
| title_full_unstemmed | Numerical study of turbulent flow and heat transfer in a novel design of serpentine channel coupled with D-shaped jaggedness using hybrid nanofluid |
| title_short | Numerical study of turbulent flow and heat transfer in a novel design of serpentine channel coupled with D-shaped jaggedness using hybrid nanofluid |
| title_sort | numerical study of turbulent flow and heat transfer in a novel design of serpentine channel coupled with d shaped jaggedness using hybrid nanofluid |
| topic | CFD Serpentine channel Heat transfer enhancement Hybrid nanofluid Dimple PEC |
| url | http://www.sciencedirect.com/science/article/pii/S1110016823000856 |
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