Upward Flow Boiling to DI-Water and Cuo Nanofluids Inside the Concentric Annuli
In this work, flow boiling heat transfer coefficients of deionized water and copper oxide water-based nanofluids at different operating conditions have been experimentally measured and compared. The liquid flowed in an annular space. According to the experiments, two distinguished heat transfer regi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Isfahan University of Technology
2015-01-01
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| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=37905&issue_ID=223 |
| _version_ | 1818475589552570368 |
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| author | N. Vaeli M. M. Sarafraz S.M. Peyghambarzadeh F hormozi |
| author_facet | N. Vaeli M. M. Sarafraz S.M. Peyghambarzadeh F hormozi |
| author_sort | N. Vaeli |
| collection | DOAJ |
| description | In this work, flow boiling heat transfer coefficients of deionized water and copper oxide water-based nanofluids at different operating conditions have been experimentally measured and compared. The liquid flowed in an annular space. According to the experiments, two distinguished heat transfer regions with two different mechanisms can be seen namely forced convective and nucleate boiling regions. Results demonstrated that with increasing the applied heat flux, flow boiling heat transfer coefficient increases for both of test fluids at both heat transfer regions. In addition to, by increasing the flow rate of fluid, the heat transfer coefficient dramatically increases at both regions. Influence of inlet temperature of fluid to the
annulus as a complicated parameter has been investigated and briefly discussed. Results showed that inlet temperature of fluid displaces the boundary between forced convection and nucleate boiling areas such that with increasing the inlet temperature, nucleation mechanism become dominant mechanism at lower heat fluxes. Furthermore, higher heat transfer coefficient can be obtained due to interactions of bubbles and local agitations. Also, Chen type model was modified in terms of thermo-physical properties and examined to experimental data. Results showed that experimental data are in a good agreement with those of obtained by the correlation with deviation up to 30%. |
| first_indexed | 2024-12-10T09:14:38Z |
| format | Article |
| id | doaj.art-9181ef2b873747a79a835c2427bc9cd5 |
| institution | Directory Open Access Journal |
| issn | 1735-3572 |
| language | English |
| last_indexed | 2024-12-10T09:14:38Z |
| publishDate | 2015-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-9181ef2b873747a79a835c2427bc9cd52022-12-22T01:54:54ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35722015-01-0184651659.Upward Flow Boiling to DI-Water and Cuo Nanofluids Inside the Concentric AnnuliN. VaeliM. M. Sarafraz0S.M. PeyghambarzadehF hormozi1Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, IranIn this work, flow boiling heat transfer coefficients of deionized water and copper oxide water-based nanofluids at different operating conditions have been experimentally measured and compared. The liquid flowed in an annular space. According to the experiments, two distinguished heat transfer regions with two different mechanisms can be seen namely forced convective and nucleate boiling regions. Results demonstrated that with increasing the applied heat flux, flow boiling heat transfer coefficient increases for both of test fluids at both heat transfer regions. In addition to, by increasing the flow rate of fluid, the heat transfer coefficient dramatically increases at both regions. Influence of inlet temperature of fluid to the annulus as a complicated parameter has been investigated and briefly discussed. Results showed that inlet temperature of fluid displaces the boundary between forced convection and nucleate boiling areas such that with increasing the inlet temperature, nucleation mechanism become dominant mechanism at lower heat fluxes. Furthermore, higher heat transfer coefficient can be obtained due to interactions of bubbles and local agitations. Also, Chen type model was modified in terms of thermo-physical properties and examined to experimental data. Results showed that experimental data are in a good agreement with those of obtained by the correlation with deviation up to 30%.http://jafmonline.net/JournalArchive/download?file_ID=37905&issue_ID=223Flow boiling; Heat transfer; Pure distillated water; Forced convection; Annulus. |
| spellingShingle | N. Vaeli M. M. Sarafraz S.M. Peyghambarzadeh F hormozi Upward Flow Boiling to DI-Water and Cuo Nanofluids Inside the Concentric Annuli Journal of Applied Fluid Mechanics Flow boiling; Heat transfer; Pure distillated water; Forced convection; Annulus. |
| title | Upward Flow Boiling to DI-Water and Cuo Nanofluids Inside the Concentric Annuli |
| title_full | Upward Flow Boiling to DI-Water and Cuo Nanofluids Inside the Concentric Annuli |
| title_fullStr | Upward Flow Boiling to DI-Water and Cuo Nanofluids Inside the Concentric Annuli |
| title_full_unstemmed | Upward Flow Boiling to DI-Water and Cuo Nanofluids Inside the Concentric Annuli |
| title_short | Upward Flow Boiling to DI-Water and Cuo Nanofluids Inside the Concentric Annuli |
| title_sort | upward flow boiling to di water and cuo nanofluids inside the concentric annuli |
| topic | Flow boiling; Heat transfer; Pure distillated water; Forced convection; Annulus. |
| url | http://jafmonline.net/JournalArchive/download?file_ID=37905&issue_ID=223 |
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