What is the science definition of porous medium?

A porous medium can be defined as a solid, or collection of solid bodies, with sufficient open space in or around the solids to enable a fluid to pass through or around them.

Which is the fundamental law of fluid flow through porous media?

Darcy’s law: Darcy’s law describes the linear relationship between the flow rate Q and pressure difference Δp when the fluid flows in porous media, which can also be named as linear flow law.

What is a porous media model give one example?

One of the simplest and the oldest porous media models is the capillaric model, which portrays a medium as a bundle of straight capillaries of equal size. In terms of the framework given in Section 3.1, each UBE of a filter contains Nc capillaries of radius ac and length ℓ.

What is porosity in porous media?

Quantitatively, porosity is the ratio of the pore volume to the total volume (bulk volume). This important rock property is determined mathematically by the following generalized relationship (Figure 2‑3): bulk volume = grain volume + pore volume.

Why porous media is important?

Porous medium is a good candidate for enhancing the combustion efficiency and reducing pollution formation, such as soot, CO and NOx. It is possible to obtain a super adiabatic temperature in the porous medium due to the passive preheating of the combustible gases.

What is the meaning of porous material?

A porous material can be defined simply as any solid containing void space(s), i.e., space not occupied by the main framework of atoms that make up the structure of the solid.

Why is gas flow in porous media different from liquid flow?

Abstract. Gas flow in porous media differs from liquid flow because of the large gas compressibility and pressure-dependent effective permeability.

What is Darcy’s law used for?

One application of Darcy’s law is to water flow through an aquifer; Darcy’s law along with the equation of conservation of mass is equivalent to the groundwater flow equation, one of the basic relationships of hydrogeology. Darcy’s law is also used to describe oil, water, and gas flows through petroleum reservoirs.

What are the properties of porous media?

A material or structure must have these two properties in order to qualify as a porous medium: It must contain spaces, so-called voids or pores, free of solids, imbedded in the solid or semi-solid matrix. The pores usually contain some fluid, such as air, water, oil or a mixture of different fluids.

What is the meaning of porous materials?

What is pore velocity?

Definition. Real average speed of the groundwater in a porous medium.