Abstract
A theoretical study of the porosity influence on external building enclosures was conducted using ANSYS and Blender software packages. A foam concrete block with porosity up to 15% was investigated as an example of an external enclosure design. Pore content was analyzed from 1.5% to 15%. The percentage analysis of pores revealed that the thermal flow value shows a significant difference at 15% porosity, reaching up to 11.3 W/m², while porosity up to 10% indicates 12.2 W/m². Furthermore, with a difference of 1.31 times, the thermal flow value reaches 15 W/m² at 1.5% porosity. Additionally, the increase in porosity positively affects the effective thermal conductivity of the foam concrete structure and its thermal resistance. The obtained research results can be used to eliminate costly experiments and provide an accurate assessment of the thermal conductivity coefficient for external enclosures made of foam concrete blocks, taking porosity into account during residential building design