Gas diffusion in fractal porous media
WebA mathematical model was developed to represent the effect of tortuous trajectory and irregular step length on gas diffusion in porous media, and then it was conformed by … WebApr 11, 2024 · In this context common parameters to describe the gas percolation through layers of porous media are the probability of gas molecule transmission and the Knudsen diffusion coefficient of the medium.
Gas diffusion in fractal porous media
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WebGas displacing a high-viscosity fluid in a two-dimensional porous disk intrudes in the form of ramified fingers similar to the structures obtained in diffusion-limited aggregation. We find that the resulting finger structures are described by a fractal dimension D= 1.62±0.04 consistent with D for diffusion-limited aggregation clusters. WebThis study analyzes non-steady-state gas diffusion through a fractal porous media with fractal pore models used to create natural porous media. The governing equations for …
WebWith the development of coal-bed methane (CBM) mining technology, deep coal-beds have become the target of CBM development. In order to simulate changes in coal adsorption and permeability characteri WebThe gas diffusion model is used to study the gas diffusion in fractal porous meida and to determine steady-state diffusion coefficient formulas. The results show that the diffusion...
WebJun 10, 2024 · The investigation of gas transport in fractured porous media is essential in most petroleum and chemical engineering. In this paper, an apparent gas permeability model for real gas flow in fractured porous media is derived with adequate consideration of real gas effect, the roughness of fracture surface, and Knudsen diffusion based on … WebApr 12, 2011 · The use of fractal theory in predicting the gas permeability and other properties of porous media has been a subject of interest in the past few years. Shi et al. (Citation 2006) introduced a fractal permeability model for the gas diffusion layer (GDL) of proton exchange membrane (PEM) fuel cells. The model accounts for the actual ...
WebA theoretical gas diffusion model for fractal porous media is presently not available. It is, therefore, desirable for an analytical model of gas diffusivity in fractal porous media. In this work, a theoretical model for gas diffusivity is reported based on steady state gas …
WebGas Steady-state Diffusion in Fractal Porous Media Du Zhehua1 1Wuhan Second Ship Design and Research Institute, 430205 Wuhan, China Abstract. Gas diffusion in fractal pores does not follow the classic Fick’s and Knudsen’s laws, so more research on gas diffusion in fractal porous media is needed. Fractal pore models are generated using the death by design play scriptWebThe Best Diesel Gas Prices near Fawn Creek, KS Change. City Guide Gas Prices Guide Best Restaurants Guide Hotel Rates Guide. Top Lowest Diesel . Unleaded; Mid Grade; … death by design diagnosis murderWebOct 5, 2024 · The gas diffusion flux of per-unit volume in matrix according to Fick ... Xia, Y. Geometrical, fractal and hydraulic properties of fractured reservoirs: A mini-review. Adv. Geo-Energy Res ... Pruess, K.; Narasimhan, T. A practical method for modeling fluid and heat flow in fractured porous media. SPE J. 1985, 25, 14–26. [Google Scholar ... generic 4port video splitter box typeWebJun 27, 2024 · Based on the calculation results of the fractal capillary bundle diffusion model, it was found that the specific surface area indirectly affects the diffusion movement by affecting the gas adsorption process, thus playing a leading role in the influence of fractal diffusion capacity of methane in coal. generic 6cd player for aux usbWebOpen-cell ceramic. In materials science, a porous medium or a porous material is a material containing pores (voids). [1] [2] The skeletal portion of the material is often called the "matrix" or "frame". The pores are typically filled with a fluid ( liquid or gas ). The skeletal material is usually a solid, but structures like foams are often ... generic 50cc mopedWebJan 1, 2015 · Gas diffusion in porous media are great importance in many science and engineering fields. In this paper, lattice Boltzmann method is applied to simulate the gas diffusion in the fractal reconstructed porous building materials. The isotropic porous materials are reconstructed by the random midpoint displacement (RMD) algorithm. generic 65c-9 series pcl driverWebIn the present work, (1) a fractal theoretical model is developed to predict the gas diffusivity in heterogeneous porous media with variable water saturation. The gas diffusion in the … death by dialogue