Open AccessA TECHNIQUE TO ESTIMATE THE TRANSIENT COEFFICIENT OF HEAT TRANSFER BY CONVECTION
Author(s) -
Guillermo Federico Umbricht,
Diana Rubio,
Rodolfo Echarri,
C. El Hasi
Publication year - 2020
Publication title -
latin american applied research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.123
H-Index - 23
eISSN - 1851-8796
pISSN - 0327-0793
DOI - 10.52292/j.laar.2020.179
Subject(s) - heat transfer coefficient , convection , mechanics , thermal conduction , thermodynamics , work (physics) , convective heat transfer , materials science , transient (computer programming) , dissipation , heat transfer , film temperature , internal heating , physics , nusselt number , computer science , reynolds number , turbulence , operating system
In this work we study the characteristics of the dissipation by convection of a solid circular section of a diameter d in a fluid. We assume that this section increases its temperature homogeneously over its whole surface from an initial temperature to the (asymptotic) temperature value . To simulate its temperature behavior, we model the transfer of heat by conduction in an isolated one-dimensional bar of length L, where a constant temperature source F is considered at the left end, while keeping free the right end causing heat dissipation by convection. We propose a novel approach to estimate the heat transfer coefficient in the transient state. Numerical experiments are carry out for different materials. In order to measure the performance in the estimation, we conduct elasticity analysis. Also a comparison with data used in the literature is included.