NUMERICAL STUDY OF STEADY LAMINAR FULLY-DEVELOPED FLUID-FLOW AND HEAT-TRANSFER IN RECTANGULAR AND ELLIPTIC-DUCTS ROTATING ABOUT A PARALLEL AXIS

A numerical study, using the finite-difference method (FDM) has been c arried out to obtain fluid how and heat transfer characteristics in re spect of rectangular and elliptical ducts, rotating about a parallel a xis situated parallel to and away from their axes. The study encompass es many geometries for the rotating as well as stationary duct section s under laminar developed flow conditions for various Prandtl numbers and aspect ratios. The investigation is made for the parameters Nu/Nu( 0), Pa Re, (fRe)/(fRe)(0) and Pr. Correlations for heat transfer in th e cases of rotating rectangular and elliptical ducts have been present ed. From the study, it has been concluded that elliptical geometry is superior to others that are frequently used as coolant channels in rot ating machinery.