Study of laminar forced convection of radiating gas over an inclined backward facing step under bleeding condition using the blocked-off method / A. B. Ansari in Journal of heat transfer, Vol. 133 N° 7 (Juillet 2011)  

Public ISBD [article]  inJournal of heat transfer > Vol. 133 N° 7 (Juillet 2011) . - pp. [072702/1-9] Titre : Study of laminar forced convection of radiating gas over an inclined backward facing step under bleeding condition using the blocked-off method Type de document : texte imprimé Auteurs : A. B. Ansari, Auteur ; S. A. Gandjalikhan Nassab, Auteur Année de publication : 2011 Article en page(s) : pp. [072702/1-9] Note générale : Physique Langues : Anglais (eng) Mots-clés : Backward facing step Laminar forced convection flow Radiation heat transfer Blocked-off method Bleeding Index. décimale : 536 Chaleur. Thermodynamique Résumé : This paper presents a numerical investigation for laminar forced convection flow of a radiating gas over an inclined backward facing step in a horizontal duct subjected to bleeding condition. The fluid is treated as a gray, absorbing, emitting, and scattering medium. The two-dimensional Cartesian coordinate system is used to simulate flow over inclined surface by considering the blocked-off region in regular grid. The governing differential equations consisting the momentum and energy are solved numerically by the computational fluid dynamics techniques to obtain the velocity and temperature fields. Discretized forms of these equations are obtained by the finite volume method and solved using the SIMPLE algorithm. Since the gas is considered as a radiating medium, convection, conduction, and radiation heat transfer mechanisms take place simultaneously in the gas flow. For computation of the radiative term in the gas energy equation, the radiative transfer equation is solved numerically by the discrete ordinate method to find the radiative heat flux distribution inside the radiating medium. The effects of bleeding coefficient, inclination angle, optical thickness, albedo coefficient, and the radiation-conduction parameter on the flow and temperature distributions are carried out. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO00013300 [...] [article] Study of laminar forced convection of radiating gas over an inclined backward facing step under bleeding condition using the blocked-off method [texte imprimé] / A. B. Ansari, Auteur ; S. A. Gandjalikhan Nassab, Auteur . - 2011 . - pp. [072702/1-9]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 7 (Juillet 2011) . - pp. [072702/1-9] Mots-clés : Backward facing step Laminar forced convection flow Radiation heat transfer Blocked-off method Bleeding Index. décimale : 536 Chaleur. Thermodynamique Résumé : This paper presents a numerical investigation for laminar forced convection flow of a radiating gas over an inclined backward facing step in a horizontal duct subjected to bleeding condition. The fluid is treated as a gray, absorbing, emitting, and scattering medium. The two-dimensional Cartesian coordinate system is used to simulate flow over inclined surface by considering the blocked-off region in regular grid. The governing differential equations consisting the momentum and energy are solved numerically by the computational fluid dynamics techniques to obtain the velocity and temperature fields. Discretized forms of these equations are obtained by the finite volume method and solved using the SIMPLE algorithm. Since the gas is considered as a radiating medium, convection, conduction, and radiation heat transfer mechanisms take place simultaneously in the gas flow. For computation of the radiative term in the gas energy equation, the radiative transfer equation is solved numerically by the discrete ordinate method to find the radiative heat flux distribution inside the radiating medium. The effects of bleeding coefficient, inclination angle, optical thickness, albedo coefficient, and the radiation-conduction parameter on the flow and temperature distributions are carried out. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO00013300 [...]

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