Application of nanomaterial for thermal unit including tube fitted with turbulator
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ORIGINAL ARTICLE
Application of nanomaterial for thermal unit including tube fitted with turbulator Yu‑Ming Chu1,2 · Z. Li3 · Quang‑Vu Bach4 Received: 31 July 2020 / Accepted: 13 October 2020 © King Abdulaziz City for Science and Technology 2020
Abstract In the present article, double pipe with installed tape was offered as a system to use the hot gas energy. The shell side was full of nanofluid (CuO-H2O) and counter flow was considered. Both zones contain turbulent regime and k–ɛ model has been implemented for simulation. Single phase model in predicting the feature of nanomaterial help us to decrease the computation cost. Modeling based on FVM was employed to extract the contours in various sections in shell region and calculation of f and Nu. In outputs, influences of revolution (N) and Re were examined. Go through the shell side, temperature goes up and velocity increases. When Re* = 5, N = 7, going from inlet to outlet sections leads to intensification of velocity and temperature about 36.1% and 5.63%. Changing N makes temperature to decline about 2.83% and 4.3% when Re = 5000 and 2000, respectively. Moreover, augment of revolution in Re* = 2 and 5 makes velocity to intensify about 16.15% and 12.53%. When N = 3, temperature declines about 4.11% with intensification of inlet velocity while velocity augments about 157.69%. Given Re* = 2, rise of N up to 5 causes Nu and f to intensify to about 17.4% and 33.15%, respectively. With intensification of Re at N = 3, Darcy factor declines to about 15.73% while Nu intensifies to about 100.59%. Keywords Nanomaterial · Nusselt number · Turbulator · Convection
Introduction Heat exchangers are necessary instruments in industrial and domestic procedures, power cycles and cooling systems, preparing conditions to transmit thermal energy from a warm surface to a cool operant fluid (He et al. 2019; Lahari et al. 2018; Yu et al. 2020; Guo et al. 2020a; Chu et al. 2020a; Wu et al. 2020). Relying on the application, there are many kinds
* Quang‑Vu Bach [email protected] 1
Department of Mathematics, Huzhou University, Huzhou 313000, People’s Republic of China
2
Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering, Changsha University of Science and Technology, Changsha 410114, People’s Republic of China
3
Yonsei Frontier Lab, Yonsei University, 50 Yonsei‑ro, Seodaemun‑gu, Seoul 03722, Republic of Korea
4
Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam
of heat exchangers categorized in some classifications such as solid–liquid, solid–gas and solid–solid heat exchangers (Bhutta et al. 2012; Luo et al. 2020a, b; Chu et al. 2020b). With the development in thermal procedures including heat recovery, the development in performance of the liquid–liquid heat exchangers has obtained an excessive importance. One path to develop the performance of a hat exchanger is using the procedure augmentation to the fabricati
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