Numerical investigation of the effect of the insulation thickness on the degree of nonuniformity of the billet temperature

• Main Authors: Somriewwongkul Eakarach, Tangthieng Chittin
• Format: Article
• Language: English
• Published: VINCA Institute of Nuclear Sciences 2015-01-01
• Series: Thermal Science
• Subjects: reheating furnace; radiative heat loss; finite volume method; degree of nonuniformity; insulation thickness
• Online Access: http://www.doiserbia.nb.rs/img/doi/0354-9836/2015/0354-98361400089S.pdf

The degree of nonuniformity of the billet temperature subjected to the radiative heat loss to the discharge door with different insulation thicknesses is investigated in this present study. The 2-D steady-state heat conduction for the billet subjected to different heat fluxes is solved by being transformed into a dimensionless form. The Gauss-Seidel iterative method for a finite volume discretization of the billet is employed to obtain the temperature distribution of the billet. The numerical result is validated by comparing with the field measurement data. A qualitative agreement between these two is observed. An effect of different insulation thicknesses on the heat-transfer characteristics and the degree of nonuniformity of the billet temperature is examined. In case of the replaced 50-mm thick insulation of the discharge door, the radiative heat loss to the discharge door is reduced by 49% with the replaced insulation, and the degree of nonuniformity of the billet temperature is decreased by 23°C.