Surface radiation effects on mixed convection heat transfer in a horizontal duct
A numerical analysis of heat transfer in a heated horizontal duct is carried out to study the effect of surface radiation from duct inner walls on mixed convection heat transfer. The duct is differentially heated, wherein the opposing vertical walls are maintained at two specified isothermal tempera...
| Main Authors: | , , |
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| Format: | Journal Article |
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Old City Publishing Inc.
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/11994 |
| _version_ | 1848747955076464640 |
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| author | Narayanaswamy, Ramesh Chandratilleke, Tilak Wangdhamkoom, Panithan |
| author_facet | Narayanaswamy, Ramesh Chandratilleke, Tilak Wangdhamkoom, Panithan |
| author_sort | Narayanaswamy, Ramesh |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A numerical analysis of heat transfer in a heated horizontal duct is carried out to study the effect of surface radiation from duct inner walls on mixed convection heat transfer. The duct is differentially heated, wherein the opposing vertical walls are maintained at two specified isothermal temperatures, while the horizontal walls are perfectly insulated. Air enters the heated duct in a hydrodynamically fully developed condition, and steadily flows under laminar conditions while undergoing thermal development within the heated duct. For a set of specified temperature differences across the isothermal vertical walls, the heat transfer rate to the airflow is evaluated, and the fluid flow patterns are obtained for a range of flow rates, duct aspect ratios, and wall emissivities. Critically examining the fluid flow patterns and the characteristics of the hot wall Nusselt number, the significance of wall radiation effects on mixed convection heat transfer is identified and analysed in this study. It is found that the interaction of surface radiation and mixed convection influences the transport phenomena within heated ducts. |
| first_indexed | 2025-11-14T06:57:22Z |
| format | Journal Article |
| id | curtin-20.500.11937-11994 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:57:22Z |
| publishDate | 2010 |
| publisher | Old City Publishing Inc. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-119942017-01-30T11:28:05Z Surface radiation effects on mixed convection heat transfer in a horizontal duct Narayanaswamy, Ramesh Chandratilleke, Tilak Wangdhamkoom, Panithan radiation horizontal duct interaction natural convection Mixed convection A numerical analysis of heat transfer in a heated horizontal duct is carried out to study the effect of surface radiation from duct inner walls on mixed convection heat transfer. The duct is differentially heated, wherein the opposing vertical walls are maintained at two specified isothermal temperatures, while the horizontal walls are perfectly insulated. Air enters the heated duct in a hydrodynamically fully developed condition, and steadily flows under laminar conditions while undergoing thermal development within the heated duct. For a set of specified temperature differences across the isothermal vertical walls, the heat transfer rate to the airflow is evaluated, and the fluid flow patterns are obtained for a range of flow rates, duct aspect ratios, and wall emissivities. Critically examining the fluid flow patterns and the characteristics of the hot wall Nusselt number, the significance of wall radiation effects on mixed convection heat transfer is identified and analysed in this study. It is found that the interaction of surface radiation and mixed convection influences the transport phenomena within heated ducts. 2010 Journal Article http://hdl.handle.net/20.500.11937/11994 Old City Publishing Inc. restricted |
| spellingShingle | radiation horizontal duct interaction natural convection Mixed convection Narayanaswamy, Ramesh Chandratilleke, Tilak Wangdhamkoom, Panithan Surface radiation effects on mixed convection heat transfer in a horizontal duct |
| title | Surface radiation effects on mixed convection heat transfer in a horizontal duct |
| title_full | Surface radiation effects on mixed convection heat transfer in a horizontal duct |
| title_fullStr | Surface radiation effects on mixed convection heat transfer in a horizontal duct |
| title_full_unstemmed | Surface radiation effects on mixed convection heat transfer in a horizontal duct |
| title_short | Surface radiation effects on mixed convection heat transfer in a horizontal duct |
| title_sort | surface radiation effects on mixed convection heat transfer in a horizontal duct |
| topic | radiation horizontal duct interaction natural convection Mixed convection |
| url | http://hdl.handle.net/20.500.11937/11994 |