Effective Thermal Conductivity of Open Cell Polyurethane Foam Based on the Fractal Theory

Table 1

The comparative table between results of calculation and experiment.

Sample	Density kg/m^3	Porosity %	Fractal dimension	Average temperature K	𝜆 W/(m·K)				Difference; %
					𝜆𝑒,foam	𝜆𝑒,𝑟	𝜆𝑒	𝜆test
1	45	81	2.63	300	0.2804	0.0022	0.2826	0.280	−0.93%
				355	0.2804	0.0028	0.2832	0.287	1.3%
2	60	72	2.53	300	0.3186	0.0022	0.3208	0.330	2.8%
				355	0.3186	0.0028	0.3214	0.332	3.2%