In the paper results of experiments on hydrodynamic assessment of gas flow through backbone (skeletal) porous materials with an anisotropic structure are presented. The research was carried out on materials of different petrographic characteristics and origin of process (char). The study was conducted for a variety of hydrodynamic conditions with the use of air. As the basis for the hydrodynamics of gas flow through porous material we assumed a gas stream as a result of pressure forcing such flow. The results of measurements indicate a clear effect of the type of material on the gas permeability, and additionally - as a result of their anisotropic internal structure - a significant effect of the flow direction on the value of gas stream.
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