Calculation of the minimal temperature after rounding off the external corner of a building
The calculation of two-dimensional temperature field in the external corner of a building is considered using numerical methods with the help of finite-differential approximation of the differential equation of thermal conduction and boundary conditions. Features of approximation of the internal boundary condition after rounding off the corner are shown and the necessary dimensionless parameters for exclusion of the influence of the concrete geometry sizes of constructions are offered. Results of the calculation of the dimensionless temperature in the corner depending on the specific rounding-off radius with the use of the computer program designed by the author are presented. The comparison of these results with the assessment by the analytic formula for a round-cylinder wall is carried out. The simplest constructive measures for decreasing the temperature difference in the corner and on the internal wall surface far from the corner connected with the additional insulation of the corner zone are researched. The necessary rounding-off radius is revealed on the basis of sanitary-hygienic requirements under different thermal resistances of the external wall.