This note is about a heat conduction issue in relation to the composite structure. The analysed structure consists of evenly distributed cells, made of two materials with different properties. The volume share of the first and the second material in the cell is constant, therefore, the structure of this composite is periodic. The effective material properties of this composite are constant along all directions. The heat conduction equation in case of this type of composite structure and in deterministic description is an equation with noncontinuous components. Therefore it is necessary to apply the method, which allows to modify and replace it, by the averaged equation with constant components. To obtain and analyse the distribution of the temperature in considered periodic composite, Finite Difference Method is used. This method gives the numeric results in the form of point plots of sought unknowns.
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