Numerical simulation study of particle deposition and heat transfer characteristics in heat transfer pipes with dimpled dimple surface
Journal Title: Energy Environmental Protection - Year 2023, Vol 37, Issue 5
Abstract
The deposition of particulate matter in heat exchanger channels can greatly reduce their heat transfer efficiency, and a better understanding of the deposition characteristics of particulate matter in heat exchanger channels is essential for improving heat exchanger performance. The deposition characteristics of particles in a three-dimensional dimpled dimple channel were simulated using the Reynolds Stress Model (RSM) and Discrete Particle Model (DPM). The flow structure, secondary flow, temperature distribution and particle deposition distribution in the dimpled dimple channel were analyzed and investigated after mesh-independence testing and numerical validation. The results showed that the main mechanisms affecting the particle deposition characteristics in dimpled dimple channels were gravity, thermophoretic forces, turbulent flow structure, secondary flow and particle inertia, and the effects of these mechanisms change significantly with particle size. For small particles (dp≤10 μm), the presence of the dimpled dimple structure promoted deposition; however, for large particles (dp>10 μm), its presence had only a small effect on the distribution of particle deposition locations.
Authors and Affiliations
HAN Zunshi|Laboratory of Energy Carbon Neutrality, School of Electrical Engineering, Xinjiang University, China, Engineering Research Center of Northwest Energy Carbon Neutrality, Ministry of Education, Xinjiang University, China, LU Hao*|Laboratory of Energy Carbon Neutrality, School of Electrical Engineering, Xinjiang University, China, Engineering Research Center of Northwest Energy Carbon Neutrality, Ministry of Education, Xinjiang University, China, Center of New Energy Research, School of Future Technology, Xinjiang University, China, ZHAO Wenjun|Engineering Research Center of Northwest Energy Carbon Neutrality, Ministry of Education, Xinjiang University, China, Center of New Energy Research, School of Future Technology, Xinjiang University, China, WANG Zeyu|Laboratory of Energy Carbon Neutrality, School of Electrical Engineering, Xinjiang University, China, XIAO Zhibo|Laboratory of Energy Carbon Neutrality, School of Electrical Engineering, Xinjiang University, China
Keywords
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- EP ID EP738025
- DOI 10.20078/j.eep.20231011
- Views 65
- Downloads 0
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