variavel0=<b>Marcelo J.S. De Lemos</b> - delemos@mec.ita.br ITA
<b>Edimilson J. Braga</b> - braga@mec.ita.br ITA
<b>Abstract.</b> Steady laminar natural convection in two-dimensional concentric and eccentric horizontal annuli cavity isothermally heated from the inner cylinder and cooled from the outer cylinder is numerically analyzed using the finite volume method. Benchmark results for laminar flow are compared with similar numerical solutions by Cho et al, (1982)(JHT,104), Kenjeres & Hanjalic, (1995)(IJHFF,16) and the experimental data of Kuehn & Goldstein, (1978)(JHT,100). Governing equations are written in terms of primitive variables and are recast into a general form. The isotherms and streamlines for annuli of the same eccentricity, but located at different angular positions are presented for RaL=104 and Ri/Ro=0.3846, where Ro and Ri are the cylinder radii and RaL is the Rayleigh number based on a characteristic length Ro - Ri.
<b>Keywords.</b> Natural Convection, Horizontal Cylindrical Anulli, Generalized Coordinate.