Convective heat transfer in airflow through a duct with wall thermal radiation
This paper presents a numerical investigation on airflow through a heated horizontal rectangular duct wherein the model considers the combined modes of natural and forced convection heat transfer and the thermal radiation from duct walls. The duct periphery is differentially heated with known temper...
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| Format: | Conference Paper |
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IOP Conference Series: Materials Science and Engineering
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/13827 |
| _version_ | 1848748450404892672 |
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| author | Chandratilleke, Tilak Narayanaswamy, Ramesh Wangdhamkoom, Panithan |
| author2 | Nasser Khalili |
| author_facet | Nasser Khalili Chandratilleke, Tilak Narayanaswamy, Ramesh Wangdhamkoom, Panithan |
| author_sort | Chandratilleke, Tilak |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This paper presents a numerical investigation on airflow through a heated horizontal rectangular duct wherein the model considers the combined modes of natural and forced convection heat transfer and the thermal radiation from duct walls. The duct periphery is differentially heated with known temperature profiles imposed on the two opposite vertical sidewalls while the other two walls are treated as adiabatic. The air enters into the duct hydrodynamically fully developed and flows steadily under laminar conditions undergoing thermal development within the duct. Considering several temperature profiles on the two vertical sidewalls, the numerical simulation generates the heat transfer rates and associated fluid flow patterns in the duct for a range of airflow rates, duct aspect ratios and surface emissivity. The variation of local Nusselt number at duct walls and the fluid flow patterns are critically examined to identify thermal instabilities and the significance of wall thermal radiation effects on the overall heat transfer rates. |
| first_indexed | 2025-11-14T07:05:14Z |
| format | Conference Paper |
| id | curtin-20.500.11937-13827 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:05:14Z |
| publishDate | 2010 |
| publisher | IOP Conference Series: Materials Science and Engineering |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-138272023-01-13T07:56:28Z Convective heat transfer in airflow through a duct with wall thermal radiation Chandratilleke, Tilak Narayanaswamy, Ramesh Wangdhamkoom, Panithan Nasser Khalili Somasundaram Valliappan Qing Li Adrian Russell This paper presents a numerical investigation on airflow through a heated horizontal rectangular duct wherein the model considers the combined modes of natural and forced convection heat transfer and the thermal radiation from duct walls. The duct periphery is differentially heated with known temperature profiles imposed on the two opposite vertical sidewalls while the other two walls are treated as adiabatic. The air enters into the duct hydrodynamically fully developed and flows steadily under laminar conditions undergoing thermal development within the duct. Considering several temperature profiles on the two vertical sidewalls, the numerical simulation generates the heat transfer rates and associated fluid flow patterns in the duct for a range of airflow rates, duct aspect ratios and surface emissivity. The variation of local Nusselt number at duct walls and the fluid flow patterns are critically examined to identify thermal instabilities and the significance of wall thermal radiation effects on the overall heat transfer rates. 2010 Conference Paper http://hdl.handle.net/20.500.11937/13827 10.1088/1757-899X/10/1/012026 IOP Conference Series: Materials Science and Engineering fulltext |
| spellingShingle | Chandratilleke, Tilak Narayanaswamy, Ramesh Wangdhamkoom, Panithan Convective heat transfer in airflow through a duct with wall thermal radiation |
| title | Convective heat transfer in airflow through a duct with wall thermal radiation |
| title_full | Convective heat transfer in airflow through a duct with wall thermal radiation |
| title_fullStr | Convective heat transfer in airflow through a duct with wall thermal radiation |
| title_full_unstemmed | Convective heat transfer in airflow through a duct with wall thermal radiation |
| title_short | Convective heat transfer in airflow through a duct with wall thermal radiation |
| title_sort | convective heat transfer in airflow through a duct with wall thermal radiation |
| url | http://hdl.handle.net/20.500.11937/13827 |