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One of the Laws for porous materials is the generalized Murray's law. Experimental methods for the investigation of pore structures include confocal microscopy and x-ray tomography. Mathematically, this is described by assigning the pore surface a Hausdorff dimension greater than 2. Porous materials often have a fractal-like structure, having a pore surface area that seems to grow indefinitely when viewed with progressively increasing resolution.
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Two important current fields of application for porous materials are energy conversion and energy storage, where porous materials are essential for superpacitors, fuel cells, and batteries. The concept of porous media is used in many areas of applied science and engineering: filtration, mechanics ( acoustics, geomechanics, soil mechanics, rock mechanics), engineering ( petroleum engineering, bioremediation, construction engineering), geosciences ( hydrogeology, petroleum geology, geophysics), biology and biophysics, material science. Many of their important properties can only be rationalized by considering them to be porous media. bones, wood, cork), and man made materials such as cements and ceramics can be considered as porous media. aquifers, petroleum reservoirs), zeolites, biological tissues (e.g. Many natural substances such as rocks and soil (e.g. However, there is also a concept of closed porosity and effective porosity, i.e.
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Often both the solid matrix and the pore network (also known as the pore space) are continuous, so as to form two interpenetrating continua such as in a sponge. Even the concept of porosity is only straightforward for a poroelastic medium. permeability, tensile strength, electrical conductivity, tortuosity) can sometimes be derived from the respective properties of its constituents (solid matrix and fluid) and the media porosity and pores structure, but such a derivation is usually complex. The skeletal material is usually a solid, but structures like foams are often also usefully analyzed using concept of porous media.Ī porous medium is most often characterised by its porosity. The pores are typically filled with a fluid ( liquid or gas). The skeletal portion of the material is often called the "matrix" or "frame". Send us feedback.A porous medium or a porous material is a material containing pores (voids). These example sentences are selected automatically from various online news sources to reflect current usage of the word 'porous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. 2021 In the first four games, missed tackles and assignments turned UConn’s defense porous and susceptible to big plays. 2021 But cinema possesses an unusual ability to burrow into public and private consciousness, making the membrane between imagination and behavior even more porous by way of identification and, sometimes, imitation. 2021 The bedrock under southern Florida is limestone, a porous rock that water can seep through.Ĭamille Squires, Quartz, 29 June 2021 Others have cited frequent flooding in the building's lower parking garage, including the possibility of water seeping up underneath through the porous limestone rock on which the barrier island sits that includes Surfside and Miami Beach.ī, 26 June 2021 Others have cited frequent flooding in the building's lower parking garage, including the possibility of water seeping up underneath through the porous limestone rock on which the barrier island sits that includes Surfside and Miami Beach.įox News, 26 June 2021 The right side of the line was porous and Garoppolo was sacked five times.Īnn Killion, San Francisco Chronicle, 7 Nov. Lindsey Mcginnis, The Christian Science Monitor, 20 Sep. 2021 Sea sponges – simple organisms that resemble porous rock – are more resilient to changing temperatures, require little maintenance, and can be sold to tourists and local hotels as a green alternative to synthetic sponges. Recent Examples on the Web The Democratic has - Party has delivered a porous border in the South.ĪBC News, 14 Nov.