Abstract
In this investigation a transient numerical analysis for laminar natural convection in air between two horizontal parallel plates, with the upper plate heated at uniform heat flux and the lower one adiabatic, is carried out by means of the finite-volume method. The model is assumed to be two-dimensional. The Navier-Stokes equations together with the continuity and energy equations are solved by a numerical scheme based on SIMPLE in an H-shaped domain. Results are presented in terms of air velocity and temperature profiles. Wall temperatures and the temporal behavior of several significant variables, such as the penetration length, are reported for different Rayleigh numbers and aspect ratio values. Correlations among penetration length, dimensionless time, Rayleigh number, and aspect ratio are evaluated for 102 ≤ Ra ≤ 104 and L/b = 5, 10, and 20. At steady state regime, correlations for average Nusselt numbers and maximum dimensionless wall temperature in terms of Rayleigh number and aspect ratio are given for 102 ≤ Ra ≤ 104 and 5 ≤ L/b ≤ 20.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
