19 RRJOMS | Volume 5 | Issue 2 | April, 2017 Research & Reviews: Journal of Material Sciences e-ISSN: 2321-6212 p-ISSN: 2347-2278 DOI: 10.4172/2321-6212.1000166 Model of Gas Permeability Coefficient in Capture Hydrodynamics for Anisotropic Materials Grzegorz Wałowski* Department of Renewable Energy Resources, Branch in Poznan, Institute of Technology and Life Sciences in Falenty, Poland Research Article INTRODUCTION The fow of gas by medium about the porous structure takes place in many processes areas. It is most often connected with phenomenon of fltration process as well as of migration of processes gasses in structures of porous adsorbents. With these problems we are also encountering in technological operations associated with thermal process of coals. This especially applies in the gas fow by different kinds of char-coal, the types of coke and active carbons structures. In each of these cases, recognizing conditions of fow by such structures and similar porous materials entails signifcant problems. They are associated with the big troubles of description of hydrodynamics, together with assessment of the mechanism of the fow of gases through porous materials with diversifed confguration of inner structure. Knowledge of these mechanisms allows to evaluate the process conditions which accompany the hydrodynamics of gas fow through porous materials and, consequently, a detailed description and modelling these conditions. The fow through porous channels with dimensions of the order of a millimetre or less, hydrodynamic phenomena are dominant over the physicochemical phenomena occurring at the interface. These latter ones are signifcant in fows through the structure of very small capillary size of - the order of several tenths of microns. The typical demonstration scheme of fuid fow by porous medium is presented on Figure 1. Such materials are denotes by such of these quantities as porosity ε, and its fow structure depends both from the dimension (diameter) of microchannel dε and their shape - at long distance of fow Lε. In consequence, pressure drop during the around fow of sinuous walls, will differ from this one at the fow of smooth and straight channels. The literature shows that in these cases a measure of this derogation (with the adequate value) can be a calculated drag coeffcient, as the resulting from the hydrodynamics fow [1,2]. With respect to the char-coal porous materials considered at the own work, the additional complexity of the hydrodynamics results also from the fact, that char-coal are the skeletal structures and so tightly clenched, and in no way ABSTRACT The results of hydrodynamic of gas fow through various type of porous material kind of coal-char are presented. With respect to hydrodynamics the studies have focused on the evaluation of the permeability of such materials as a resulting from the gas fow pressure drop. It allowed determining the permeability coeffcient and the pressure drop coeffcient, too. Due to anisotropic structure of carbonizers the examination were performed with respect to the fow direction, i.e. directivity permeability, as a result of three-dimensional orientation for each materials sample. The results of measurements indication strongly diversifed hydrodynamic parameters for investigated types of materials, and comparison of test results leads to a conclusions that the main reason of this is clear of anisotropic structure of carbonizers. In order to obtain the wider description of microstructure process conditions as the hydrodynamic result of gas fow through porous materials, attempted to use the numerical method to assessment of this process. Numerical modeling indicated the concept of gas fow through porous a tortuous structure of microchannels and micropores, together forming a porous structure with a specifc geometry – both an elementary unit constituting the porous layer-bed. Received: 20/04/2017 Accepted: 13/05/2017 Published: 20/05/2017 *For Correspondence Grzegorz Wałowski, Department of Renewable Energy Resources, Branch in Poznan, Institute of Technology and Life Sciences in Falenty, Poland, Tel: 0048618203331. Email: g.walowski@itp.edu.pl Keywords: Hydrodynamic, Anisotropic, Porous material, Coal-Char, Bioleaching, Bioflm, Cfd