the ratio of the volume of pore (non-rock or non-sediment) spaces in a rock or sediment to the total volume (rock or sediment + pore spaces.
Voids or pores, commonly resulting from solidification shrinkage, air (primarily the nitrogen component of air) trapped in a casting, or hydrogen exuded during electroplating.
The percent of open areas per unit volume of fabric.
the fraction of open spaces in the snow fence, where 0% is a solid fence and increasing values indicate lower density. This does not include the bottom gap.
a measure of the porous nature of the paper determined by the passage of air through the sheet
The ratio of the size of a material's pores to the volume of the material's mass.
The volume percent of open or pore space in a rock.
The percentage of the total volume of a rock that is pore space (not occupied by mineral grains).
The total volume of empty space (pore space) in a material, usually expressed as a percentage.
Porosity - The proportion, commonly stated as a percentage, of the total volume of a rock material that consists of pore space or voids.
Porosity measures the air-flow through the sheet , and is an indication of how porous the sheet is.
A structural property of paper reflected by the size distribution of pores
Percentage of space in rock or soil occupied by voids, whether the voids are isolated or connected. Compare permeability.
degree to which the soil has pores or cavities, i.e. % of soil unoccupied by solid particles. (There can be small or large pores, many or few.)
the ratio of the aggregate volume of pore spaces in rock or soil to its total volume, usually stated as a percentage.
Ratio of void volume to total cake volume. Also filter medium which may have larger pores than any other media.
A measure of the number and size of the spaces between each particle in a rock. Porosity affects the amount of liquid and gases, such as natural gas and crude oil, that a given reservoir can contain.
Entrapped gas bubbles or voids in a gel coat film.
A volume fraction of a material that is empty, or without material.
The volume of pore space in a rock, sediment or soil. Usually expressed as a percentage. This pore space can include openings between grains, fracture openings and caverns.
The total amount of pore space in a soil. Porous soils have plenty of pore space; compact, dense soils have low total porosity.
The ratio of void space to the bulk volume of rock containing that void space. Porosity can be expressed as a fraction or percentage of pore volume in a volume of rock. (1) Primary porosity refers to the porosity remaining after the sediments have been compacted but without considering changes resulting from subsequent chemical action or flow of waters through the sediments. See primary porosity. (2) Secondary porosity is the additional porosity created by chemical changes, dissolution, dolomitization, fissures, and fractures. See secondary porosity. (3) Effective porosity is the interconnected pore volume available to free fluids, excluding isolated pores and pore volume occupied by adsorbed water. In petroleum engineering practices, the term porosity usually means effective porosity. (4) Total porosity is all void space in a rock and matrix whether effective or noneffective. Total porosity includes that porosity in isolated pores, adsorbed water on grain or particle surfaces, and associated with clays. It does not include water of crystallization wherein the water molecule becomes part of the crystal structure.
the ratio of the volume of the interstices to the total volume of a rock, expressed as a fraction or a percentage. Effective porosity includes only the interconnected pore spaces available for groundwater transmission.
Porosity is the measurement of airflow through the sheet. The instrument used is the Bendtsen apparatus. The results are expressed in millilitre per minute (ml/min). The higher the figure quoted, the more porous the material.
The ratio of the volume of voids in a rock or soil to the total volume.
the ability of rock material to store water
n: 1. the condition of being porous (such as a rock formation). 2. the ratio of the volume of empty space to the volume of solid rock in a formation, indicating how much fluid a rock can hold.
The fractional volume of pore space in a porous medium. In SUTRA, the porosity is assumed to remain constant with time.
The term expressing the porous degree of a sintered plate. The equation for its calculation is
The property of being porous.(Course Material/Ultrasonics/Introduction/presentstate.htm)
The volume of pore space in rock or soil, expressed as a percentage of total volume.
The pore space within a fired body. This is measured by weighing a specimen, boiling it in water, weighing it again, and calculating the increase in weight.
The volume of pores divided by the total volume.
The ratio of open spaces or voids in a material to the volume of its mass.
The percentage of a soil, rock, or sediment's volume that is made up of pores.
The porosity of a soil is the percentage of the soil volume not occupied by soil solids.
Regions of air, gas, or voids in a plastic or a composite laminate and usually expressed as a volume percentage
The percentage of the total volume of a rock or sediment that consists of pore space.
The proportion of the volume of a material that consists of open spaces.
the property of being porous; being able to absorb fluids
A characteristic of reservoir rock determined by its holes or spaces. Higher porosity rock can contain more hydrocarbons and is, therefore, considered a better quality of reservoir rock.
The volume percentage of the total bulk not occupied by solid particles.
The volume of void space (space filled with air or water) in soil or bedrock. When these voids are interconnected, water or air (or other fluids) can migrate from void to void. Thus interconnected pores make the soil or bedrock permeable.
the ratio of the volume of pore space to the volume of solids in a material. Porosity determines the capacity of the material to hold water --the more pores, the more water.
The volume of the pore space expressed as a percent of the total volume of the rock mass.
Voids or pores resulting from trapped gas, or shrinkage during solidification.
The volume of the voids within a quantity of particulate solid divided by the total volume, i.e. the volume of voids divided by the volume of voids plus the volume of solid present. Synonym for voidage.
The total porosity is defined as the ratio between the volume of the voids and the total volume of a soil or rock. It is usually reported as a decimal fraction or percent. The effective porosity is the percent of the porous media that consists of interconnected pore spaces that contribute to the flow of air or water.
The percentage of the total volume of an aggregate partivle occupied by pore spaces.
a description of the total volume of rock or soil not occupied by soil matter.
The degree to which growing media has contains open spaces. These spaces, or pores, are essential to holding water (water-holding porosity) and allowing gas exchange (aeration porosity) in plants' root zones.
the property of being porous, having pores; the ratio of minute channels or open spaces (pores) to the volume of solid matter.
1) The quality, state, or degree of being porous; 2) a porous structure or part.
is the volume of voids in a material expressed as a percentage of the total volume of the material.
The percentage (by volume) of holes or voids in a rock. Commercially productive reservoir rocks typically have porosity's ranging from about 5% - 35%. The higher the porosity, the more oil or gas that can be contained in the pore spaces, the better the quality of the reservoir rock.
The percentage of space in the soil or aquifer mass not occupied by solids with respect to the total volume of mass.
The ratio of the volume of a material's pores (voids) to its total volume; usually expressed as a percentage.
The total volume of the base divided by the volume of voids in the base.
Small voids or pores, usually gas filled, in the weld metal.
The presence of pores or voids in a coating whether connected or not. Porosity is not the same as pull-out.
the percentage of pore spaces in an aquifer that can be filled with water (Because the sandy soils of the Pinelands store water readily, they are said to have a high percentage of porosity.)
the condition of containing numerous small holes or voids.
the percentage of a materials volume that is pore space, or open space
A term for the amount of pores, or empty spaces, within a material.
Of sufficiently loose texture to permit passage of liquid or gases through pores.
Degree to which soil, gravel, sediment or rock is permeated with pores or cavities through which water or air can move.
Percentage of the rock volume that can be occupied by oil, gas or water.
A defect found in castings or welds consisting of gas bubbles or voids in the solidified metal.
The amount of pores (voids) expressed as a percentage of the total volume of the powder metallurgy part.
A ratio between the volume of the pore space in reservoir rock and the total bulk volume of the rock. The pore space determines the amount of space available for storage of fluids.
The ratio of the volume of open spaces or voids to the total volume of a porous material. For example, a sand and gravel deposit may have 20 percent porosity. Porosity determines the amount of water that can be stored in a saturated formation. A saturated formation 100 feet thick with a porosity of 20 percent could store an equivalent water depth of approximately 20 feet.
A measure of the volume of internal pores, or voids, in ion exchangers and filter media; sometimes expressed as a ratio to the total volume of the medium.
The percentage of open spaces (pores) in rock or soil. When these spaces are interconnected, water, air, or other fluids can migrate from space to space. Interconnected spaces make the soil or bedrock permeable.
The open space within a rock, similar to a sponge.
The percentage of the volume of a material, such as soil or rock, that is occupied by pore spaces. Porosity is an indication of the capacity of the material to hold water.
the volume fraction of a rock or unconsolidated sediment not occupied by solid material but usually occupied by water and/or air.
The capacity of soil or rock to hold water. The ratio of the volume of void spaces in a rock or sediment to the total volume of the rock or sediment. DIAGRAM
The ratio of the voids or open spaces in alluvium and rocks to the total volume of the alluvium or rock mass.
The ratio of the volume of void or air spaces in a rock or sediment to the total volume of the rock or sediment. The capacity of rock or soil to hold water varies with the material. For example, saturated small grain sand contains less water than coarse gravel.
Measurement reflecting the percentage of open spaces, or pores, on a powdered metal part compared to the volume of the part.
Your hair's porosity determines how it will absorb color. Hair that is very porous, due to overprocessing or other chemical exposures such as swimming, will absorb color more readily.
ratio of the total volume of voids available for fluid transmission to the total volume of a porous medium. Also the ratio of the volume of the voids of a soil or rock mass that can be drained by gravity to the total volume of the mass.
This is a casting defect where small pockets of air are trapped in the aluminum as it cools. The machining process can open up these voids, resulting in bubbles in the clearcoat. There is no way to correct this condition if it is found in a wheel. Porosity only affects the appearance of the wheel, not the integrity.
Describes how porous the material is (not the same as density) the higher the porosity, the greater the need for sealing.
The percentage of bulk volume of a rock or other object that is occupied by void space, whether isolated or connected. Porosity is further subdivided into effective (or connected) pores, primary, secondary, and minus-cement categories. Primary porosity includes all depositional pore spaces; secondary porosity records the volume of void space resulting from dissolution and (or) fracturing of the rock or sediment. Minus-cement porosity category combines intergranular primary porosity and secondary porosity, in addition to authigenic cements and clays, as an estimate of the amount of porosity at the time of lithification; porosity resulting from intragranular dissolution is excluded
The void space in a rock created by cavities between the constituent mineral grains. Commonly referred to as a percentage of the total rock volume, it is within the void space that liquids are contained.
A matter which is porous or contains pores which are able to absorb liquid. Subfloors, which are porous, are normally concrete and wood. If there is any doubt as to the porosity of a subfloor, put a few drops of water on the surface. If the water is quickly absorbed, the surface is porous. If the water remains on the surface, the surface is nonporous.
The quality of having pores, one of the factors that contributes to the permeability of concrete. MetaMax® reduces porosity by making calcium hydroxide insoluble so it can not leach out of concrete and, in doing so, create pores.
The ratio of the volume of space to the volume of solid rock in a formation indicating how much oil, natural gas, or water the formation can hold.
The degree to which the total volume of soil or rock is permeated with spaces or cavities through which water or air can move.
a measure of the ratio of open space within a rock or soil to its total volume
a measure of the void or pore space within rocks and sediments (the ratio of the volume of void spaces to the total volume).
Volume of pore spaces between mineral grains expressed as a percentage of the total rock volume. Thus porosity measures the capacity of the rock to hold oil, gas, or water.
The ratio of the volume of voids to the total volume of a rock or unconsolidated material. It is a measure of the amount of empty 'space' in a material. See permeability.
the presence of many small holes or voids in part of the mass of a rubber part
(a) The ability of a fired body to absorb water by capillary action. (b) A measure of the proportion of pores in a ceramic material.
A measure of the open area of a filter medium. Sometimes expressed as a void volume.
The ratio of the volume of voids in the material to the total volume of the material, including the voids, usually expressed as a percentage.
The ratio of the volume of the interstices, to the volume of the solid particles. The pore volume is also used as a measure of porosity.
The volume of free space between the grains of a rock capable of holding fluid, (gas or liquid). It is expressed as a percentage of total gross rock volume.
The volume of pores in a soil sample (nonsolid volume) divided by the bulk volume of the sample
The state of being porous, open or semi-vitrefied.
A term describing a plastic part that has many visible voids.
The ratio of pore volume to total volume of the soil. Sandy soils have large pores and a higher porosity than clays and other fine-grained soils.
The presence of visible voids within a solid material into which either air or liquids can pass.
The presence of pores or voids in a coating, usually expressed as a percentage by volume.
The percentage of the total volume of a given body of rock that is pore space. It is the portion of void (air) space in rock, soil, or sediment.
The proportion of the non-solid volume to the total volume of material.
The degree of pore space in a soil i.e. the percentage of the total space between solid particles.
The volume of bulk soil not occupied by solid particles.
In relation to ground-water, the capacity of soil or rock to hold water.
the state of being porous. This is an important factor in the creation of ceramics. Clay can be too porous or not porous enough, which may result in cracking. Clay can be combined with flint, grog, or another type of clay to adjust its porosity.
The presence of numerous minute voids in a cured material.
The percentage of void in a porous rock compared to the solid formation.
the percent of space or pores between sediment particles; it indicates the amount of water the sediment can hold.
The volume of voids in an open-graded base divided by the total volume of the base.
The total volume of all pore spaces in a medium divided by the total volume of the medium.
the ratio of the volume of voids (openings) to the total volume of material. Used to describe the ability of a fluid to move through crushed rocks or other material.
The volume of water that can be held within a rock or soil. Usually expressed as a ratio of the volume of the pores (voids) to the total volume of the material.
The voids or openings in geological materials.
Open voids intentionally created in grinding wheels to provide pocket to carry swarf and metalworking fluids during grinding. Some wheel have induce porosity through the use of small hollow spheres of alumina or the use of chemicals (moth balls) that are easily vaporized during firing of the grinding wheel. Recently, porosity on vitrified superabrasives wheels has allows significant improvements in creep feed grinding processes.
the measure of how much open space, pores, a material has for water to move through.
numerous air pockets or voids in a moulded product
a measure of the amount of voids (pores) in a material. An important property of rocks that determines the quantities of fluids or gases they can store; for example, the amount of water an aquifer can store (see: permeability).
presence or numerous visible voids.
The amount of void space in a powder compact. Most PIM materials have less than 5% porosity after sintering.
Ratio of void (or fluid) volume to apparent (total) volume of a porous material.
a measure of the water-bearing capacity of subsurface rock. With respect to water movement, it is not just the total magnitude of porosity that is important, but the size of the voids and the extent to which they are interconnected, as the pores in a formation may be open, or interconnected, or closed and isolated. For example, clay may have a very high porosity with respect to potential water content, but it constitutes a poor medium as an aquifer because the pores are usually so small.
The amount of empty space in concrete.
Permeablility to water or air. Consider the porosity of a wall surface before applying a primer-sealer. If it is very porous, seal the wall with an oil-based sealer or a pigmented acrylic primer-sealer. Also consider the porosity of the wallpaper substrate. If it is very absorbent, a second application of adhesive may be required.
(1) The degree of open area between the fibers. (2) The void area which exists in the structure.
The presence of numerous small holes or voids.
The ratio of the volume of all the pore spaces in a geologic formation to the volume of the whole formation.
Porosity measures the capacity of the rock to hold oil, gas or water. It is measured in bulk percentage of the volume of rock.
The ratio of voids volume to total volume.
in engineering and soils, the ratio of the volume of voids to the total volume of the soil. In soils, usually it is given in percentage.
The percentage of open or void space in a rock relative to solid material.
Porosity is the unsoundness in cast metals caused by the presence of small pores, holes or voids in the metal. Also see Poor Crystallization.
The open spaces or voids that occur between mineral grains or in fractures of bedrock.
percentage of void space within a rock. Only high porosity reservoir rocks, like sandstone, bear oil and gas.
a measure of the pore space within a rock and expressed as a percentage of volume.
The ratio of the void volume of a porous rock to the total volume, usually expressed as a percentage.
The fractional void volume of the mesh.
Porosity is a physical property of soil and rock. It is defined as the ratio of the amount of pore space present in a soil sample to the total volume of the sample. The voids or holes can be between grains of sand or gravel, in fractures or cracks in bedrock, or in larger voids where rock was dissolved by groundwater. Rock porosity varies from near zero to over sixty (60) percent.
A condition of trapped pockets of air, gas, or vacuum within a solid material, usually expressed as a percentage of the total nonsolid volume to the total volume (solid plus nonsolid) of a unit quantity of material.
ratio of the volume of spaces in a material to its total volume. The natural porosity of materials is one of the main causes of their erosion. All porous building materials, whether inside or out, may be effectively protected with ProtectGuard . Less porous materials such as marble or granite are protected to exactly the same degree as the more porous materials such as limestone, concrete and reconstituted building stone.
the ratio of pore volume to total volume of a filter medium expressed as a percent.
The volume of pores in a soil sample divided by the bulk volume of the sample. Air-filled porosity is the fraction of the bulk volume of soil that is filled with air at any given time or under a given condition, such as a specified soil-water content.
The non-solid portion of a volume of soil, consisting of air- or water-filled pore space. Soil porosity, both the total amount of pore space and the distribution of pore sizes, controls soil water content, air movement, and water movement. The rates of air exchange and water movement depend on both the volume and continuity of pore spaces within the soil.
Fraction of the total mould volume that can be occupied by the resin. It is related to the fibre/volume fraction Vf as: porosity = 1 - Vf.
Fraction of bulk volume of a material consisting of pore space. Porosity determines the capacity of a rock formation to absorb and store ground water.
Amount of pore spaces in a geologic unit, usually expressed as a ratio of volume of pore spaces to total volume of rock.
The void spaces found in rock, sediment, or soil. Commonly measured as the percentage of void space in a volume of substance.
The ratio of void volume to total volume: n = Vv / V where Vv = volume of voids V = total volume
The presence of pores in a cast structure. The only gas which dissolves to any extent in aluminium is hydrogen. When molten aluminium is solidified the level of hydrogen that can remain in solution is reduced, so porosity may result.
A measure of the volume of pores in a material.
1. Extent to which cavities or pores exist, allowing water to pass through. 2. Weld defect caused by small holes in the weld filler metal.
The volume of void space per total volume. See also void ratio.
Multiple air voids in an Insulation or jacket wall.
A rock is said to be porous if it possesses cavities between the mineral grains making up the rock which can contain liquid or gas. The term “porosity ratio”, or implied “porosity”, is given to the percentage of void space a rock contains.
The open or void space within rock
The capacity of a reservoir to store fluids, the volume of the pore space within a reservoir
Porosity is a measure of the void spaces in a material, and is measured as a fraction, between 0–1, or as a percent between 0–100%. The term porosity is used in multiple fields including manufacturing, earth sciences and construction.