TY - JOUR
T1 - A numerical investigation of conjugated-natural convection heat transfer enhancement of a nanofluid in an annular tube driven by inner heat generating solid cylinder
AU - Shahi, Mina
AU - Mahmoudi, Amir Houshang
AU - Talebi, Farhad
PY - 2011/4
Y1 - 2011/4
N2 - Laminar conjugate heat transfer by natural convection and conduction in a vertical annulus formed between an inner heat generating solid circular cylinder and an outer isothermal cylindrical boundary has been studied by a numerical method. It is assumed that the two sealed ends of the tube to be adiabatic. Governing equations are derived based on the conceptual model in the cylindrical coordinate system. The governing equations have been solved using the finite volume approach, using SIMPLE algorithm on the collocated arrangement. Results are presented for the flow and temperature distributions and Nusselt numbers on different cross sectional planes and longitudinal sections for Rayleigh number ranging from 105 to 108, solid volume fraction of 0<Φ<0.05 with copper-water nanofluid as the working medium. Considering that the driven flow in the annular tube is strongly influenced by orientation of tube, study has been carried out for different inclination angles.
AB - Laminar conjugate heat transfer by natural convection and conduction in a vertical annulus formed between an inner heat generating solid circular cylinder and an outer isothermal cylindrical boundary has been studied by a numerical method. It is assumed that the two sealed ends of the tube to be adiabatic. Governing equations are derived based on the conceptual model in the cylindrical coordinate system. The governing equations have been solved using the finite volume approach, using SIMPLE algorithm on the collocated arrangement. Results are presented for the flow and temperature distributions and Nusselt numbers on different cross sectional planes and longitudinal sections for Rayleigh number ranging from 105 to 108, solid volume fraction of 0<Φ<0.05 with copper-water nanofluid as the working medium. Considering that the driven flow in the annular tube is strongly influenced by orientation of tube, study has been carried out for different inclination angles.
KW - Annular tube
KW - Conjugated- Natural convection heat transfer
KW - Heat generating solid rod
KW - Nanofluid
KW - Numerical method
KW - Solid concentration
KW - Volumetric heat generation
UR - http://www.scopus.com/inward/record.url?scp=79952190362&partnerID=8YFLogxK
U2 - 10.1016/j.icheatmasstransfer.2010.12.022
DO - 10.1016/j.icheatmasstransfer.2010.12.022
M3 - Article
AN - SCOPUS:79952190362
SN - 0735-1933
VL - 38
SP - 533
EP - 542
JO - International Communications in Heat and Mass Transfer
JF - International Communications in Heat and Mass Transfer
IS - 4
ER -