Experimental study on mixed convection heat transfer in a square duct with varying inclination angles
This study analysed mixed convection heat transfer for thermally developing flow in a side heated square duct with varying inclination angles. The test section consists of one-side heated isothermal wall and three adiabatic walls. The inclination angle varied from 0° to 20°, with hot wall temperatur...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
Universiti Putra Malaysia Press (UPM)
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/34050 |
| _version_ | 1848754115876749312 |
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| author | Rajamohan, G. Narayanaswamy, Ramesh Kumar, P. |
| author_facet | Rajamohan, G. Narayanaswamy, Ramesh Kumar, P. |
| author_sort | Rajamohan, G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This study analysed mixed convection heat transfer for thermally developing flow in a side heated square duct with varying inclination angles. The test section consists of one-side heated isothermal wall and three adiabatic walls. The inclination angle varied from 0° to 20°, with hot wall temperature ranging from 30°C to 100°C, and heat flux ranging from 252 W/m 2 to 872 W/m 2 . Reynolds number was varied from 858 to 1788 and the wall surface emissivity was considered to be 0.05 and 0.85. Flow visualizations were carried out to obtain the flow structure of natural convection and mixed convection for three inclination angles. The variation of surface temperature along the length of the test section was studied to calculate the convective Nusselt number. The result showed that the heat transfer enhancement and convective Nusselt number was significantly affected by the variations of inclination angle, flow velocity, Reynolds number, and the surface radiation. It was also observed that the increase in the inclination angle improved convection rate and hence significantly enhanced heat transfer. |
| first_indexed | 2025-11-14T08:35:17Z |
| format | Journal Article |
| id | curtin-20.500.11937-34050 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:35:17Z |
| publishDate | 2015 |
| publisher | Universiti Putra Malaysia Press (UPM) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-340502017-01-30T13:40:59Z Experimental study on mixed convection heat transfer in a square duct with varying inclination angles Rajamohan, G. Narayanaswamy, Ramesh Kumar, P. This study analysed mixed convection heat transfer for thermally developing flow in a side heated square duct with varying inclination angles. The test section consists of one-side heated isothermal wall and three adiabatic walls. The inclination angle varied from 0° to 20°, with hot wall temperature ranging from 30°C to 100°C, and heat flux ranging from 252 W/m 2 to 872 W/m 2 . Reynolds number was varied from 858 to 1788 and the wall surface emissivity was considered to be 0.05 and 0.85. Flow visualizations were carried out to obtain the flow structure of natural convection and mixed convection for three inclination angles. The variation of surface temperature along the length of the test section was studied to calculate the convective Nusselt number. The result showed that the heat transfer enhancement and convective Nusselt number was significantly affected by the variations of inclination angle, flow velocity, Reynolds number, and the surface radiation. It was also observed that the increase in the inclination angle improved convection rate and hence significantly enhanced heat transfer. 2015 Journal Article http://hdl.handle.net/20.500.11937/34050 Universiti Putra Malaysia Press (UPM) restricted |
| spellingShingle | Rajamohan, G. Narayanaswamy, Ramesh Kumar, P. Experimental study on mixed convection heat transfer in a square duct with varying inclination angles |
| title | Experimental study on mixed convection heat transfer in a square duct with varying inclination angles |
| title_full | Experimental study on mixed convection heat transfer in a square duct with varying inclination angles |
| title_fullStr | Experimental study on mixed convection heat transfer in a square duct with varying inclination angles |
| title_full_unstemmed | Experimental study on mixed convection heat transfer in a square duct with varying inclination angles |
| title_short | Experimental study on mixed convection heat transfer in a square duct with varying inclination angles |
| title_sort | experimental study on mixed convection heat transfer in a square duct with varying inclination angles |
| url | http://hdl.handle.net/20.500.11937/34050 |