Numerical Solution of the Effect of Increasing the Wall Temperature on Flow and Heat Transfer in Pulsating Heat Pipe
In this paper the effects of increasing the wall temperature and the amount of liquid charge on the oscillating flow in a U-shaped miniature tube, with a simple bend of diameter 1.5 mm and closed end investigated. The governing equations are obtained by applying the conservation of mass, momentum an...
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| Format: | Article |
| Language: | fas |
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Semnan University
2020-05-01
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| Series: | مجله مدل سازی در مهندسی |
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| Online Access: | https://modelling.semnan.ac.ir/article_4091_7cc487cd80b90beb88428dbe10cb55eb.pdf |
| _version_ | 1827342363665629184 |
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| author | Habiballah Sayevand Reza Nemati |
| author_facet | Habiballah Sayevand Reza Nemati |
| author_sort | Habiballah Sayevand |
| collection | DOAJ |
| description | In this paper the effects of increasing the wall temperature and the amount of liquid charge on the oscillating flow in a U-shaped miniature tube, with a simple bend of diameter 1.5 mm and closed end investigated. The governing equations are obtained by applying the conservation of mass, momentum and energy for the liquid slug and the vapor plugs. A complete numerical simulation has been performed to investigate the effects of wall temperature and the amount of liquid charge on the heat pipe performance using explicit method. The obtained results show that by increasing the walls temperature difference, amplitude of oscillations of the liquid slug, sensible and latent heat transfer will be increased, as the temperature difference is increased by only ,oscillation amplitude of the liquid slug about 8 mm, the sensible heat transfer 4 watts and the latent heat transfer watts increases. Additionally, by increasing the charge rate, the oscillation amplitude and the sensible heat transfer are significantly reduced, for example, increasing the charge rate from 30 to 50% reduces the oscillation amplitude by about 65 mm as well as the sensible heat transfer by 87 watts reduces. In the charging ratio 90%, the heat pipe operation is stopped. |
| first_indexed | 2024-03-07T22:06:35Z |
| format | Article |
| id | doaj.art-dc03bdaa07284c7cac33014f43e19542 |
| institution | Directory Open Access Journal |
| issn | 2008-4854 2783-2538 |
| language | fas |
| last_indexed | 2024-03-07T22:06:35Z |
| publishDate | 2020-05-01 |
| publisher | Semnan University |
| record_format | Article |
| series | مجله مدل سازی در مهندسی |
| spelling | doaj.art-dc03bdaa07284c7cac33014f43e195422024-02-23T19:07:14ZfasSemnan Universityمجله مدل سازی در مهندسی2008-48542783-25382020-05-011860132510.22075/jme.2019.15523.15424091Numerical Solution of the Effect of Increasing the Wall Temperature on Flow and Heat Transfer in Pulsating Heat PipeHabiballah Sayevand0Reza Nemati1Assistant Professor of Mechanical Engineering, Bu-Ali Sina University, Department of Mechanical Engineering, Hamedan, I. R. IranGraguatedIn this paper the effects of increasing the wall temperature and the amount of liquid charge on the oscillating flow in a U-shaped miniature tube, with a simple bend of diameter 1.5 mm and closed end investigated. The governing equations are obtained by applying the conservation of mass, momentum and energy for the liquid slug and the vapor plugs. A complete numerical simulation has been performed to investigate the effects of wall temperature and the amount of liquid charge on the heat pipe performance using explicit method. The obtained results show that by increasing the walls temperature difference, amplitude of oscillations of the liquid slug, sensible and latent heat transfer will be increased, as the temperature difference is increased by only ,oscillation amplitude of the liquid slug about 8 mm, the sensible heat transfer 4 watts and the latent heat transfer watts increases. Additionally, by increasing the charge rate, the oscillation amplitude and the sensible heat transfer are significantly reduced, for example, increasing the charge rate from 30 to 50% reduces the oscillation amplitude by about 65 mm as well as the sensible heat transfer by 87 watts reduces. In the charging ratio 90%, the heat pipe operation is stopped.https://modelling.semnan.ac.ir/article_4091_7cc487cd80b90beb88428dbe10cb55eb.pdfcondenserevaporatorpulsating heat pipeheat transfernumerical solution |
| spellingShingle | Habiballah Sayevand Reza Nemati Numerical Solution of the Effect of Increasing the Wall Temperature on Flow and Heat Transfer in Pulsating Heat Pipe مجله مدل سازی در مهندسی condenser evaporator pulsating heat pipe heat transfer numerical solution |
| title | Numerical Solution of the Effect of Increasing the Wall Temperature on Flow and Heat Transfer in Pulsating Heat Pipe |
| title_full | Numerical Solution of the Effect of Increasing the Wall Temperature on Flow and Heat Transfer in Pulsating Heat Pipe |
| title_fullStr | Numerical Solution of the Effect of Increasing the Wall Temperature on Flow and Heat Transfer in Pulsating Heat Pipe |
| title_full_unstemmed | Numerical Solution of the Effect of Increasing the Wall Temperature on Flow and Heat Transfer in Pulsating Heat Pipe |
| title_short | Numerical Solution of the Effect of Increasing the Wall Temperature on Flow and Heat Transfer in Pulsating Heat Pipe |
| title_sort | numerical solution of the effect of increasing the wall temperature on flow and heat transfer in pulsating heat pipe |
| topic | condenser evaporator pulsating heat pipe heat transfer numerical solution |
| url | https://modelling.semnan.ac.ir/article_4091_7cc487cd80b90beb88428dbe10cb55eb.pdf |
| work_keys_str_mv | AT habiballahsayevand numericalsolutionoftheeffectofincreasingthewalltemperatureonflowandheattransferinpulsatingheatpipe AT rezanemati numericalsolutionoftheeffectofincreasingthewalltemperatureonflowandheattransferinpulsatingheatpipe |