RT Journal Article ID 3fd8f47733a07792 A1 Bakhti, Fatima Zohra A1 Si-Ameur, Mohamed A1 Chehhat , A. M. T1 Free Convection in a Vertical Duct: Numerical Study JF Heat Transfer Research JO HTR YR 2011 FD 2012-02-29 VO 42 IS 6 SP 539 OP 555 K1 free convection K1 vertical duct K1 direct numerical simulation K1 finite volume method AB The subject of this paper is a direct numerical study of laminar and laminar-to-turbulent transient natural convection in a vertical duct, with a constant wall temperature, that exceeds the ambient fluid temperature. The governing equations are solved without modeling of the turbulence effect using a finite volume method. We presented the fields of velocity, temperature, and pressure as well as variation of the mean Nusselt number as a function of the Rayleigh number. The numerical simulation has been made for the Rayleigh number in the range from 1 to 105 for aspect ratios 3, 5, 8, and 12. The obtained results are compared with those given in the literature and a good agreement has been found. PB Begell House LK https://www.dl.begellhouse.com/journals/46784ef93dddff27,4018a5882fbf68bf,3fd8f47733a07792.html