Mohammed, Ali J. and Ali, Hussein Hayder Mohammed and Barrak, Anwar S. and Hussein, A. M. and Mohammed, Murad Ramadan (2024) Enhancement of turbulent heat transfer by using CuO nano-particle and twisted tape. POLLACK PERIODICA : AN INTERNATIONAL JOURNAL FOR ENGINEERING AND INFORMATION SCIENCES, 19 (3). pp. 115-121. ISSN 1788-1994 (print); 1788-3911 (online)
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Abstract
A computational model is developed to investigate the convective heat transfer properties and the fluid flow characteristics of cupric oxide - water nano-fluid in a horizontal circular pipe aiming to provide insights into optimizing heat transfer in such systems. A twisted tape with varied twist ratios is inserted. This quantitative investigation used five Reynolds number from 4,000 to 12,000 under a uniform heat flux scenario of 25,000 W m−2. All experiments were performed as a single-phase fluid with cupric oxide values of 0, 0.4, 1, and 2% by volume. By reducing the twist ratio and increasing volume concentration, the average heat transfer coefficient of cupric oxide-water nano-fluid was improved. For a twist ratio of 4D, the maximum heat transfer improvement was 228% greater than the plain pipe. The presence of twisted tape with modest step ratios causes the friction factor to grow.
Item Type: | Article |
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Uncontrolled Keywords: | nano application; heat transfer; nano-fluids; Improvement heat exchanger |
Subjects: | T Technology / alkalmazott, műszaki tudományok > T2 Technology (General) / műszaki tudományok általában |
Depositing User: | Emese Kató |
Date Deposited: | 14 Nov 2024 12:28 |
Last Modified: | 14 Nov 2024 12:28 |
URI: | https://real.mtak.hu/id/eprint/209621 |
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