Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
NUMERICAL ANALYSIS OF THE NATURAL CONVECTIVE HEAT TRANSFER BETWEEN TWO INCLINED ISOTHERMAL WAVY SURFACES
Submission Author:
Igor Caetano Gazotto , SP
Co-Authors:
Igor Caetano Gazotto, Santiago del Rio Oliveira
Presenter: Igor Caetano Gazotto
doi://10.26678/ABCM.ENCIT2020.CIT20-0052
Abstract
This article consists of the numerical analysis of the natural convective heat transfer from two inclined surfaces containing waves on both sides. The distance that separates the surfaces is relatively small in such a way that the flow from both surfaces influences the heat transfer rates from each surface. The waves considered in this work have a rectangular shape with constant height, having the effect of increasing the heat transfer rate of the heated plates to an adjacent fluid, in this case, ambient air. The main objective of this article is to determine the natural convective heat transfer rates from the inclined wavy surfaces to the ambient air. Effects on the natural convective heat transfer from the individual surfaces of each plate as well as from the total surface of each plate will be analyzed according to the following variables: inclination angle, dimensionless distance between the surfaces and the Rayleigh number. Results will be obtained numerically using the standard k − turbulence model including effects of buoyant forces with the aid of the commercial CFD solver ANSYS FLUENT©. Depending on the results obtained, geometric recommendations of the situation under analysis can be made that provide the greatest improvement in the natural convective heat transfer rate from the inclined wavy surfaces.
Keywords
natural convective heat transfer, k ε turbulence model, isothermal plates, inclined plates
DOWNLOAD PDF VIEW PRESENTATION
