TY - JOUR
T1 - Variable viscosity effects on a conjugate laminar film-condensation process
AU - Arcos, J. C.
AU - Bautista, O.
AU - Méndez, F.
N1 - Funding Information:
This work has been supported by the research grants no. 43010-Y of Consejo Nacional de Ciencia y Tecnología of Mexico and no. 20060250 of SIP-IPN.
PY - 2008/3
Y1 - 2008/3
N2 - In this work, we treat theoretically the conjugate film-condensation process on a vertical fin immersed in a saturated vapor, taking into account that the viscosity of the condensed film is a well-defined function of the temperature. In order to predict the thickness of the film, the momentum and energy balance equations for the condensate and the energy equation for the vertical fin are reduced to a nonlinear system of two ordinary differential equations. These governing equations contain four nondimensional parameters, the Jakob number, Ja, a conjugate heat transfer parameter, ε, the aspect ratio of the fin, β, and [image omitted], that take into account the effect of the variable viscosity. Using the limit Ja ≪ 1 and the boundary layer approximation for the film-condensation process, the nondimensional heat transfer and the overall mass flow rates of the condensed fluid have been obtained as functions of the involved nondimensional parameters.
AB - In this work, we treat theoretically the conjugate film-condensation process on a vertical fin immersed in a saturated vapor, taking into account that the viscosity of the condensed film is a well-defined function of the temperature. In order to predict the thickness of the film, the momentum and energy balance equations for the condensate and the energy equation for the vertical fin are reduced to a nonlinear system of two ordinary differential equations. These governing equations contain four nondimensional parameters, the Jakob number, Ja, a conjugate heat transfer parameter, ε, the aspect ratio of the fin, β, and [image omitted], that take into account the effect of the variable viscosity. Using the limit Ja ≪ 1 and the boundary layer approximation for the film-condensation process, the nondimensional heat transfer and the overall mass flow rates of the condensed fluid have been obtained as functions of the involved nondimensional parameters.
KW - Conjugate heat transfer
KW - Film condensation
KW - Fin
KW - Variable viscosity
UR - http://www.scopus.com/inward/record.url?scp=37848999974&partnerID=8YFLogxK
U2 - 10.1080/00986440701569093
DO - 10.1080/00986440701569093
M3 - Artículo
SN - 0098-6445
VL - 195
SP - 229
EP - 242
JO - Chemical Engineering Communications
JF - Chemical Engineering Communications
IS - 3
ER -