Laminar Heat Transfer in the Entrance Region of Internally Finned Square Ducts
The laminar, incompressible, hydrodynamically fully developed and thermally developing flow is studied in straight ducts of square cross section, containing four equal, symmetrical, straight, thin and with 100 percent efficiency internal fins. Both the duct wall and the fins are subjected successive...
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| Veröffentlicht in: | Journal of heat transfer 2001-12, Vol.123 (6), p.1030-1034 |
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| container_title | Journal of heat transfer |
| container_volume | 123 |
| creator | Sakalis, V. D Hatzikonstantinou, P. M |
| description | The laminar, incompressible, hydrodynamically fully developed and thermally developing flow is studied in straight ducts of square cross section, containing four equal, symmetrical, straight, thin and with 100 percent efficiency internal fins. Both the duct wall and the fins are subjected successively to constant temperature boundary condition. Numerical results are obtained using an iterative ADI scheme for the friction number, the temperature distribution and the Nusselt number for the thermally developing and developed regions as functions of axial distance and fin height. Results obtained are in good agreement with the corresponding literature values. In the thermally developing region a high heat transfer coefficient is obtained. Friction number and Nusselt number in the thermally developed limit increase as the fin height increases until they reach their critical values at fin heights near 0.85 and 0.73 respectively. |
| doi_str_mv | 10.1115/1.1404118 |
| format | Article |
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D ; Hatzikonstantinou, P. M</creator><creatorcontrib>Sakalis, V. D ; Hatzikonstantinou, P. M</creatorcontrib><description>The laminar, incompressible, hydrodynamically fully developed and thermally developing flow is studied in straight ducts of square cross section, containing four equal, symmetrical, straight, thin and with 100 percent efficiency internal fins. Both the duct wall and the fins are subjected successively to constant temperature boundary condition. Numerical results are obtained using an iterative ADI scheme for the friction number, the temperature distribution and the Nusselt number for the thermally developing and developed regions as functions of axial distance and fin height. Results obtained are in good agreement with the corresponding literature values. In the thermally developing region a high heat transfer coefficient is obtained. Friction number and Nusselt number in the thermally developed limit increase as the fin height increases until they reach their critical values at fin heights near 0.85 and 0.73 respectively.</description><identifier>ISSN: 0022-1481</identifier><identifier>EISSN: 1528-8943</identifier><identifier>DOI: 10.1115/1.1404118</identifier><identifier>CODEN: JHTRAO</identifier><language>eng</language><publisher>New York, NY: ASME</publisher><subject>Applied sciences ; Boundary conditions ; Devices using thermal energy ; Ducts ; Energy ; Energy. Thermal use of fuels ; Exact sciences and technology ; Fins (heat exchange) ; Heat exchangers (included heat transformers, condensers, cooling towers) ; Hydrodynamics ; Incompressible flow ; Iterative methods ; Laminar flow ; Nusselt number</subject><ispartof>Journal of heat transfer, 2001-12, Vol.123 (6), p.1030-1034</ispartof><rights>2002 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a340t-185ba85aa819e0f233e28a4296e813319d6d3caf71a1023e099ef4947960d7103</citedby><cites>FETCH-LOGICAL-a340t-185ba85aa819e0f233e28a4296e813319d6d3caf71a1023e099ef4947960d7103</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925,38520</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=14121492$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Sakalis, V. D</creatorcontrib><creatorcontrib>Hatzikonstantinou, P. M</creatorcontrib><title>Laminar Heat Transfer in the Entrance Region of Internally Finned Square Ducts</title><title>Journal of heat transfer</title><addtitle>J. Heat Transfer</addtitle><description>The laminar, incompressible, hydrodynamically fully developed and thermally developing flow is studied in straight ducts of square cross section, containing four equal, symmetrical, straight, thin and with 100 percent efficiency internal fins. Both the duct wall and the fins are subjected successively to constant temperature boundary condition. Numerical results are obtained using an iterative ADI scheme for the friction number, the temperature distribution and the Nusselt number for the thermally developing and developed regions as functions of axial distance and fin height. Results obtained are in good agreement with the corresponding literature values. In the thermally developing region a high heat transfer coefficient is obtained. Friction number and Nusselt number in the thermally developed limit increase as the fin height increases until they reach their critical values at fin heights near 0.85 and 0.73 respectively.</description><subject>Applied sciences</subject><subject>Boundary conditions</subject><subject>Devices using thermal energy</subject><subject>Ducts</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Exact sciences and technology</subject><subject>Fins (heat exchange)</subject><subject>Heat exchangers (included heat transformers, condensers, cooling towers)</subject><subject>Hydrodynamics</subject><subject>Incompressible flow</subject><subject>Iterative methods</subject><subject>Laminar flow</subject><subject>Nusselt number</subject><issn>0022-1481</issn><issn>1528-8943</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><recordid>eNp9kDtPwzAUhS0EEuUxMLN4AcSQ4ms7sT0inpUqkKDM1iW9gVSp09rJwL8nVSuxMV3p6jtHRx9jZyDGAJDfwBi00AB2j40glzazTqt9NhJCygy0hUN2lNJCCFBKuxF7meKyDhj5M2HHZxFDqijyOvDum_hD6IZPSfyNvuo28Lbik9BRDNg0P_yxDoHm_H3dYyR-35ddOmEHFTaJTnf3mH08PszunrPp69Pk7naaodKiy8Dmn2hzRAuORCWVImlRS1eQHYaBmxdzVWJlAEFIRcI5qrTTxhVibkCoY3a17V3Fdt1T6vyyTiU1DQZq--SNzgttDcBAXv5LysIYKAozgNdbsIxtSpEqv4r1EuOPB-E3bj34nduBvdiVYiqxqTaS6vQX0CBBOzlw51sO05L8ou035pLXwzpl1C8Br37I</recordid><startdate>20011201</startdate><enddate>20011201</enddate><creator>Sakalis, V. 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Thermal use of fuels</topic><topic>Exact sciences and technology</topic><topic>Fins (heat exchange)</topic><topic>Heat exchangers (included heat transformers, condensers, cooling towers)</topic><topic>Hydrodynamics</topic><topic>Incompressible flow</topic><topic>Iterative methods</topic><topic>Laminar flow</topic><topic>Nusselt number</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sakalis, V. D</creatorcontrib><creatorcontrib>Hatzikonstantinou, P. M</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Mechanical Engineering Abstracts</collection><jtitle>Journal of heat transfer</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sakalis, V. D</au><au>Hatzikonstantinou, P. M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Laminar Heat Transfer in the Entrance Region of Internally Finned Square Ducts</atitle><jtitle>Journal of heat transfer</jtitle><stitle>J. Heat Transfer</stitle><date>2001-12-01</date><risdate>2001</risdate><volume>123</volume><issue>6</issue><spage>1030</spage><epage>1034</epage><pages>1030-1034</pages><issn>0022-1481</issn><eissn>1528-8943</eissn><coden>JHTRAO</coden><abstract>The laminar, incompressible, hydrodynamically fully developed and thermally developing flow is studied in straight ducts of square cross section, containing four equal, symmetrical, straight, thin and with 100 percent efficiency internal fins. Both the duct wall and the fins are subjected successively to constant temperature boundary condition. Numerical results are obtained using an iterative ADI scheme for the friction number, the temperature distribution and the Nusselt number for the thermally developing and developed regions as functions of axial distance and fin height. Results obtained are in good agreement with the corresponding literature values. In the thermally developing region a high heat transfer coefficient is obtained. Friction number and Nusselt number in the thermally developed limit increase as the fin height increases until they reach their critical values at fin heights near 0.85 and 0.73 respectively.</abstract><cop>New York, NY</cop><pub>ASME</pub><doi>10.1115/1.1404118</doi><tpages>5</tpages></addata></record> |
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| ispartof | Journal of heat transfer, 2001-12, Vol.123 (6), p.1030-1034 |
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| language | eng |
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| source | ASME Transactions Journals (Current) |
| subjects | Applied sciences Boundary conditions Devices using thermal energy Ducts Energy Energy. Thermal use of fuels Exact sciences and technology Fins (heat exchange) Heat exchangers (included heat transformers, condensers, cooling towers) Hydrodynamics Incompressible flow Iterative methods Laminar flow Nusselt number |
| title | Laminar Heat Transfer in the Entrance Region of Internally Finned Square Ducts |
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