Wpływ brzegu na efektywny współczynnik przewodzenia ciepła w przegrodzie z pustkami izolacyjnymi

In the paper the influence of the edge on the effective thermal conductivity in a multi-channel wall element has been investigated. It has been assumed that the air holes are regularly arranged according to the square pattern. In order to determine the effective thermal conductivity the solution of steady heat flow in a repeated element has been used. The solution has been based on the boundary collocation method. The formula for the effective thermal conductivity has been obtained. Some of the numerical values have been juxtaposed. The influence of the row number of holes as well as their dimensions on the effective thermal conductivity has been shown graphically.