An effective model for measuring transient natural convective heat flux in vertical parallel plates with a rectangular rib

摘要: Abstract The total heat input for transient natural convection experiments in vertical parallel plates with a rectangular rib is composed of four kinds heat-transfer mode—radiative loss, conductive thermal capacity the test plate and convective transfer channel. Based on this model measuring distributions, dimensionless flux defined two generalized correlations are proposed—one power-on period one power-off period. In addition, by using these acquired q c distributions proposed Nu correlations, average Nusselt numbers periods have been successfully estimated. Satisfactory comparisons made between L predictions experimental data.