Effects of wave number and average radius on flow and heat transfer in a curve-wave channel
Liyu Zhang
Institute of Building Energy & Sustainable Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China
Search for more papers by this authorCorresponding Author
Min Zhao
China Northwest Architecture Design and Research Institute Co Ltd, Xi'an, China
Correspondence
Liwen Jin, Institute of Building Energy & Sustainable Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China.
Email: [email protected]
Min Zhao, China Northwest architecture Design and Research institute Co Ltd, Xi'an, China.
Email: [email protected]
Search for more papers by this authorZhao Lu
School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China
Search for more papers by this authorXiaoling Yu
School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China
Search for more papers by this authorFei Duan
School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore, Singapore
Search for more papers by this authorCorresponding Author
Liwen Jin
Institute of Building Energy & Sustainable Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China
Correspondence
Liwen Jin, Institute of Building Energy & Sustainable Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China.
Email: [email protected]
Min Zhao, China Northwest architecture Design and Research institute Co Ltd, Xi'an, China.
Email: [email protected]
Search for more papers by this authorLiyu Zhang
Institute of Building Energy & Sustainable Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China
Search for more papers by this authorCorresponding Author
Min Zhao
China Northwest Architecture Design and Research Institute Co Ltd, Xi'an, China
Correspondence
Liwen Jin, Institute of Building Energy & Sustainable Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China.
Email: [email protected]
Min Zhao, China Northwest architecture Design and Research institute Co Ltd, Xi'an, China.
Email: [email protected]
Search for more papers by this authorZhao Lu
School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China
Search for more papers by this authorXiaoling Yu
School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China
Search for more papers by this authorFei Duan
School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore, Singapore
Search for more papers by this authorCorresponding Author
Liwen Jin
Institute of Building Energy & Sustainable Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China
Correspondence
Liwen Jin, Institute of Building Energy & Sustainable Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China.
Email: [email protected]
Min Zhao, China Northwest architecture Design and Research institute Co Ltd, Xi'an, China.
Email: [email protected]
Search for more papers by this authorFunding information: National Key Research & Development Program of China, Grant/Award Number: 2016YFC0802405; Key Scientific Research Innovation Team Project of Shaanxi Province, Grant/Award Number: 2016KCT-16; Scientific and Technological Innovation Project in Shaanxi Province, Grant/Award Number: 2015KTCQ01-99
Summary
The demand for high cooling capacity heatsinks has been increasingly promoted due to the fast elevated heat generation of modern electronic devices. High-performance microscale heat exchangers are often accompanied by considerable pressure drop penalty that limits their applications. In order to avoid large pressure drop while maintaining high heat transfer rate, a macroscale curved channel was proposed with applying the periodical wave structure on the channel sidewalls. A three-dimensional conjugated numerical model was established, and the effects of wave number and average radius on the hydrothermal performance were investigated. It was found that the heat transfer performance in the smooth-curve channel is significantly improved due to the wavy sidewalls with a moderate pressure drop penalty. The heat transfer enhancement is more noticeable in the channels with more wave units and smaller average channel radius. Furthermore, it was noted that the periodical thermal entrance effect exists on the inner and the outer convective surfaces of curve-wave channels, which can be attributed to the variations of the secondary flow with the wave direction along the channels.
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