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Journal articles on the topic 'Degree of porosity'

Author: Grafiati

Published: 3 June 2025

Last updated: 1 August 2025

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1

Bagaiskov, Yu. "Influence of gas permeability of abrasive tools on their structural and mechanical parameters." Journal of Physics: Conference Series 2131, no. 5 (2021): 052043. http://dx.doi.org/10.1088/1742-6596/2131/5/052043.

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Abstract Quality assurance and processing capacity are essential performance parameters of abrasive tools. It is of prime importance for grinding wheels operating at a speed of 35–60 m/s. In this case, the opportunities to increase the high-rate grinding efficiency without burns are associated with using high-porosity and low-hardness wheels. Artificial pore-forming agents are used to manufacture tools. Introduction of pore-forming agents decreases grinding forces and increases the maximum grinding depth without burns. The porosity of filled compound materials can be attributed to the concepti

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2

Zhang, A. Ying, and Dong Xing Zhang. "Effects of Void on Physical Properties of Hygrothermal Conditioned CFRP." Advanced Materials Research 652-654 (January 2013): 3–6. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.3.

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The effects of voids and the environment conditions on the curing degree and the Barcol hardness of CFRP laminates were discussed in this paper. The curing degree increased with increasing immersion time. The porosity had the negative effects on the curing degree of the specimens at the same immersion time. The Barcol hardness decreased with increasing immersion time. The porosity had no obvious effects on the Barcol hardness of the specimens at the same immersion time. The curing degree increased in the hygrothermally conditions. The effect of the environment conditions on the Barcol hardness

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3

Yao, Jian-Tao, Hui Dong, and Li-Shuang Wang. "Porosity Prediction of Porous Materials Deposited by Semi-Molten Spraying Particles." Metals 11, no. 11 (2021): 1702. http://dx.doi.org/10.3390/met11111702.

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To determine the relationship between the deposition characteristics of semi-molten particles and the porosity of porous materials prepared by flame spraying, metal powders of Mo and 316L were used and the melting degree of deposition particles was controlled. Based on the experimental observations, a three-dimensional, random-stacking model was established by introducing the slipping characteristics of semi-molten particles, which could help predict the porosity of the generated porous metal materials. The results show that the maximum porosity of porous materials deposited by semi-molten par

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Wessely, Isabelle D., Yannick Matt, Qi An, Stefan Bräse, and Manuel Tsotsalas. "Dynamic porous organic polymers with tuneable crosslinking degree and porosity." RSC Advances 11, no. 44 (2021): 27714–19. http://dx.doi.org/10.1039/d1ra05265a.

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We synthesised three different POPs via a nitroxide exchange reaction and modulated their crosslinking degree. That allowed us to investigate the influence of the crosslinking degree and the structure of the molecular components on the porosity.

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Zheng, Yuansheng, Jingyuan Gao, Kai Liu, and Cheng Ge. "The Effect of Orientation Degree of Electrospun Polystyrene Fiber on Filtration Performance of Fiber Membrane." AATCC Journal of Research 9, no. 2 (2022): 90–97. http://dx.doi.org/10.1177/24723444221081457.

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In this study, ultrafine polystyrene fiber membranes with different fiber orientation degrees were prepared by and electrospinning method, and two methods were used to characterize the fiber orientation degree. In addition, the effects of fiber orientation degree on the surface wettability and smoke filtration performance of fiber membrane were studied. The results showed that the water repellency and smoke absorption capacity of the polystyrene fiber membrane decrease with the increasing fiber orientation degree and the porosity. The orientation degree of the fiber has a significant influence

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Chemezov, Denis Alexandrovich. "THE DEGREE OF SHRINKAGE POROSITY IN THE CASTINGS AFTER SOLIDIFICATION." Theoretical & Applied Science 51, no. 07 (2017): 1–6. http://dx.doi.org/10.15863/tas.2017.07.51.1.

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7

Ordovás, J., E. Carmona, M. T. Moreno, and M. C. Ortega. "Characteristics of Internal Porosity of Cork Container Media." HortScience 31, no. 7 (1996): 1177–79. http://dx.doi.org/10.21273/hortsci.31.7.1177.

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The structure of cork (Quercus suber L.) bark presents a series of characteristics, suggesting that internal porosity is partly occluded. This study determined the porosity in the waste cork industry (C) and when such waste product had been composted during 4 (CC-4), 7 (CC-7), and 10.5 months (CC-10.5). The particle density of the intact and finely ground material differed significantly in all particle size ranges larger than 0.5 mm. The porosity of the cork substrates ranged from 80% to 94% of the total volume, according to granulometry and the degree of decomposition. However, large particle

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8

Yang, Jing, Ling Hao Wang, Fu Li Ma, and Xiao Hong Bai. "Study on Reasonable Feature of Compaction Loess with Air Porosities." Applied Mechanics and Materials 238 (November 2012): 441–46. http://dx.doi.org/10.4028/www.scientific.net/amm.238.441.

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The degree of compaction is usually used as the compaction quality and control indicator of backfill in practical project. However, as the degree of compaction is affected by various internal and external factors, its accuracy is difficult to guarantee. In this paper, compacted loess samples were prepared under different compaction energies by normal compaction method. The curves of compression coefficient and dry density, the compression coefficient and porosity of compaction loess samples under different compaction energy are analyzed while the water content is constant. The air porosities o

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9

Luna-Galiano, Y., C. Fernández-Pereira, and M. Izquierdo. "Contributions to the study of porosity in fly ash-based geopolymers. Relationship between degree of reaction, porosity and compressive strength." Materiales de Construcción 66, no. 324 (2016): 098. http://dx.doi.org/10.3989/mc.2016.10215.

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The main contribution of this paper relates to the development of a systematic study involving a set of parameters which could potentially have an impact on geopolymer properties: curing temperature, type of activating solution, alkali metal in solution, incorporation of slag (Ca source) and type of slag used. The microstructures, degrees of reaction, porosities and compressive strengths of geopolymers have been evaluated. Geopolymers prepared with soluble silicate presented a more compacted and closed structure, a larger amount of gel, lower porosity and greater compressive strength than thos

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10

Ramm, M., and K. Bjørlykke. "Porosity/depth trends in reservoir sandstones: assessing the quantitative effects of varying pore-pressure, temperature history and mineralogy, Norwegian Shelf data." Clay Minerals 29, no. 4 (1994): 475–90. http://dx.doi.org/10.1180/claymin.1994.029.4.07.

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AbstractEmpirical porosity/depth trends from the Norwegian Continental Shelf are discussed in the light of models on compactional processes during burial. Linear best-fit lines are useful as a first approximation, illustrating the general decline in porosity with depth. Porosity increases non-linearly with pore-pressure, and notably higher than normal porosity is found in very high overpressure reservoirs. Hydrostatic pressure sandstones from the Haltenbanken area are on average more porous than equivalents from the northern Viking Graben. This may be related to the burial history, as generall

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11

Zimmermann, Karen, and J. Mark Hipfner. "Egg Size, Eggshell Porosity, and Incubation Period in the Marine Bird Family Alcidae." Auk 124, no. 1 (2007): 307–15. http://dx.doi.org/10.1093/auk/124.1.307.

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Abstract Although the ultimate factors that influence the duration of avian incubation periods are well known, we know much less about the proximate mechanisms by which birds adjust incubation period in response to selection. We tested the hypothesis that an adjustment in eggshell porosity is one such proximate mechanism (i.e., that avian species with higher ratios of incubation period to egg size lay eggs with less porous shells). Eggshell porosity affects the rate of gaseous exchange between the developing embryo and the external environment; thus, to the extent that embryonic metabolism is

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12

Zhao, Yuan, Jiangteng Li, and Gang Ma. "Experimental Study on the Damage and Degradation Characteristics of Red Sandstone after Dry and Wet Cycling by Low Magnetic Field Nuclear Magnetic Resonance (NMR) Technique." Geofluids 2021 (April 12, 2021): 1–8. http://dx.doi.org/10.1155/2021/8866028.

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To study the damage evolution of rocks under the action of wet and dry cycles, nuclear magnetic resonance (NMR) technology was used to test red sandstone under different times of wet and dry cycles. The T 2 spectral distribution curve, porosity, spectral peak area, and damage distribution curve of the rock were obtained, and the quantitative relationship between porosity, damage degree, and number of cycles was established. The results show that with the increase of the number of wet and dry cycles, the T 2 spectral curve of rock gradually moves to the right, but the moving amplitude gradually

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13

Suleymanova, L. A., Inna A. Pogorelova, and K. A. Kara. "Non-Autoclaved Aerated Concrete Porosity and Factors Affecting it." Materials Science Forum 992 (May 2020): 218–27. http://dx.doi.org/10.4028/www.scientific.net/msf.992.218.

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The total volume of cellular porosity, which comprises pores, interpore partitions, and air-entrained pores, depends on the spatial packing of pores, size distribution, maximum and average size, their shape, and the thickness of interpore partitions. Interpore partitions contain gel and capillary pores, which have a significant impact on the total porosity, thus affecting the operating properties of aerated concrete. This paper presents the calculations of gel, capillary, air, and total porosity in non-autoclaved aerated concrete of average-density grades D100...D1200 for different cement hydr

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14

BUCHANAN, JAMES L., ROBERT P. GILBERT, and KHALDOUN KHASHANAH. "DETERMINATION OF THE PARAMETERS OF CANCELLOUS BONE USING LOW FREQUENCY ACOUSTIC MEASUREMENTS." Journal of Computational Acoustics 12, no. 02 (2004): 99–126. http://dx.doi.org/10.1142/s0218396x04002213.

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The Biot model is widely used to model poroelastic media. Several authors have studied its applicability to cancellous bone. In this article the feasibility of determining the Biot parameters of cancellous bone by acoustic interrogation using frequencies in the 5–15 kHz range is studied. It is found that the porosity of the specimen can be determined with a high degree of accuracy. The degree to which other parameters can be determined accurately depends upon porosity.

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15

Zhang, Mei Ling, Jia Yu You, and Yun Xin Liu. "Impact Analysis of Complex Pore Structure Parameters on Degree of Flooding Formation." Applied Mechanics and Materials 543-547 (March 2014): 4141–44. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.4141.

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It can be seen from the correspondence consists of three porosity curves of reservoir and cores capillary pressure curves that, the larger pore connectivity a rock has, the higher movable fluid saturation calculation will be under natural pressure. If the restraint porosity is higher, even in the presence of fluid in the formation applied pressure, formation fluid is still harder to drive out.It can be proved by instance of well cores pressure mercury data. By establishing relationships between data of dynamic mining degree and the averagr radius of pore throat shows thatunder the same mining

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16

Chen, Yen-Chun, Felix N. Buechi, Chrysoula Karageorgiou, Jens Eller, and Thomas J. Schmidt. "Porosity, Porosity Heterogeneity and Morphology Characterization of Microporous Layers of Commercial Gdls." ECS Meeting Abstracts MA2022-02, no. 39 (2022): 1375. http://dx.doi.org/10.1149/ma2022-02391375mtgabs.

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Porosity and morphology of MPLs have a remarkable influence on the performance of PEFCs. However, until now, MPL porosity is largely undetermined for all commercial gas diffusion layers and the MPLs are commonly thought of as a homogeneous layer in thickness and porosity. Many model studies are based on this picture. However, these assumptions are not evidence-based, and can lead to erroneous interpretations of MPL functions. The challenge of having realistic models of MPLs lies in the lack of descriptions of MPL properties on the representative millimeter scale, while its pore structure is on

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17

Onyia, Tobias Makuochukwu, and Dr Ndubuisi Edennaya Idenyi. "Effects of Rice Husk Ash Addition on the Refractory Properties of Owo Clay." Indian Journal of Agriculture Engineering 4, no. 2 (2024): 1–6. http://dx.doi.org/10.54105/ijae.e4136.04021124.

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This research investigates the effect of rice husk ash (RHA) addition on the refractory properties of Owo clay. The clay is blended with RHA in increments of 5 Percent for each experimental run. The blended material undergoes exposure to temperatures ranging from normal crucible liner conditions to 1200 Degree C, followed by characterization for shrinkage, porosity, density, water absorption, and modulus of rupture. Results indicate that total shrinkage increases with RHA content throughout the experimental phase but stability was observed at 10 Percent RHA. Porosity decreases with increasing

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18

Li, Pengfei, Wei Lu, Xuehui An, Li Zhou, and Sanlin Du. "Effect of Epoxy Latexes on the Mechanical Behavior and Porosity Property of Cement Mortar with Different Degrees of Hydration and Polymerization." Materials 14, no. 3 (2021): 517. http://dx.doi.org/10.3390/ma14030517.

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In this study, an analysis of the influence of polymer modification on the mechanical behavior, porosity, and microstructure of mortar is carried out. Epoxy latexes contents of 5%, 10%, 15%, and 20% of cement were employed in the preparation of cement mortars based on the same workability. The specimens were subjected to dry, wet, and wet–dry curing regimes. Compressive strength, flexural strength, Mercury intrusion porosimetry (MIP), and scanning electronic microscope (SEM) tests were conducted to analyze the effect of epoxy latexes on the mechanical property and porosity of modified mortars.

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19

Li, Ji, and Xin Wu. "Research of Coal Pores and Integrity Evaluation Method Based on Fractal Theory." Applied Mechanics and Materials 670-671 (October 2014): 258–62. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.258.

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Coal is a natural porous media, its porosity and structural integrity influenced the gas adsorption and desorption characteristics greatly, as well as physical and mechanical properties of coal. Scanning electron microscopy (SEM) is applied to acquire SEM image of four kinds of coal samples at different zoom levels, and the box dimension can be worked out based on the pore preprocessing of SEM images. Then, the numerical value of box dimension is used to describe the development degree of the four kinds of coal sample and four development degrees’ sequence. At last, the intrinsic relevance bet

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20

Ahmed, Yasser M. Z., B. A. Iskander, F. M. Mohamed, M. Ibrahim, and M. E. H. Shalabi. "MEDIUM-POROSITY SINTERED IRON COMPACT AND THE CORRELATION BETWEEN THE PARAMETERS AFFECTING ITS POROSITY DEGREE USING EXPERIMENTAL DESIGN TECHNIQUE." Journal of Porous Media 14, no. 4 (2011): 295–303. http://dx.doi.org/10.1615/jpormedia.v14.i4.20.

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21

Hitoshi Shoji, Takao Kameda, Kunio Kawada, Okitsugu Watanabe, and Henrik B. Clausen. "An empirical relation between overburden pressure and firn density." Annals of Glaciology 20 (1994): 87–94. http://dx.doi.org/10.3189/1994aog20-1-87-94.

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Two empirical equations for firn densification have been obtained,considering firn porosity as a function of overburden pressure. In the first equation, thereduction ratio of porosity in firn is assumed to be proportional to the increasing ratioof overburden pressure and the mth power of the porosity. The porosity exponent m should be close to -2, so as to have a best-fit with 14 depth-density profiles fromGreenland and Antarctica. In the second equation, the reduction ratio of porosity wasassumed to increase proportionally to the increment of overburden pressure and thenth power of the porosi

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Hitoshi Shoji, Takao Kameda, Kunio Kawada, Okitsugu Watanabe, and Henrik B. Clausen. "An empirical relation between overburden pressure and firn density." Annals of Glaciology 20 (1994): 87–94. http://dx.doi.org/10.1017/s0260305500016281.

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Two empirical equations for firn densification have been obtained,considering firn porosity as a function of overburden pressure. In the first equation, thereduction ratio of porosity in firn is assumed to be proportional to the increasing ratioof overburden pressure and the mth power of the porosity. The porosity exponentmshould be close to -2, so as to have a best-fit with 14 depth-density profiles fromGreenland and Antarctica. In the second equation, the reduction ratio of porosity wasassumed to increase proportionally to the increment of overburden pressure and thenth power of the porosity

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23

Chuaponpat, Natthapong, Tsubasa Ueda, Akira Ishigami, Takashi Kurose, and Hiroshi Ito. "Morphology, Thermal and Mechanical Properties of Co-Continuous Porous Structure of PLA/PVA Blends by Phase Separation." Polymers 12, no. 5 (2020): 1083. http://dx.doi.org/10.3390/polym12051083.

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Poly (lactic acid) (PLA) was blended with poly (vinyl alcohol) (PVA) in the composition of 70/30 (L7V3), 60/40 (L6V4), and 50/50 (L5V5) wt.%. L7V3 exhibits a sea–island morphology, while L6V4 and L5V5 show co-continuous phase morphologies. These polymers exhibited a solitary glass transition temperature, which obeyed the Fox equation. Thereafter, the blends were made porous by an etching process in hot water (35 °C) for 0–7 days, to remove PVA. The maximum etched PVA content of L7V3, L6V4, and L5V5 was 0.5%, 13.4%, and 36.1%, respectively; hence, L5V5 exhibited a co-continuous porous morpholog

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Wang, Xixin, Yuming Liu, Jiagen Hou, et al. "The relationship between synsedimentary fault activity and reservoir quality — A case study of the Ek1 formation in the Wang Guantun area, China." Interpretation 8, no. 3 (2020): SM15—SM24. http://dx.doi.org/10.1190/int-2019-0131.1.

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The activity of synsedimentary faults plays an important role in controlling the distribution of sand bodies in basins and furthermore the porosity and permeability of reservoirs. We have used fault interpretation, the method of image and granularity size analysis, and the seismic pumping effect to investigate the control of the activity of the Kongdong fault on the development degree of the dissolution pores and grain size, further studying the controlling mechanism of the activity of synsedimentary faults on reservoir quality (porosity and permeability). The results showed that the slip rate

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Wagle, John S., David H. Malone, Eric W. Peterson, and Lisa M. Tranel. "Porosity controls on secondary recovery at the Loudon field, south-central Illinois." Interpretation 4, no. 1 (2016): T1—T13. http://dx.doi.org/10.1190/int-2015-0078.1.

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Waterflooding has been used as an effective means to enhance oil recovery in mature oil fields for decades. The success of waterflooding is a function of geology, facies changes, and fluid dynamics, specifically, formation porosity and permeability. Within the Loudon oil field (Illinois), waterflooding has been used to increase production, but the degree of success has been variable. We have used 3D facies modeling was evaluate the variables controlling the success or failure of waterflooding. Three leases within the Loudon field exhibiting varying degrees of waterflood success were investigat

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26

Matsumoto, Takayuki. "A Study of the Durability of a Paper-Based Friction Material Influenced by Porosity." Journal of Tribology 117, no. 2 (1995): 272–78. http://dx.doi.org/10.1115/1.2831242.

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The friction performance and thermal resistance of paper-based oil immersed friction materials are influenced by the material structure formed as a result of the combination of porosity and resiliency. In this paper, the effects of porosity on the thermal durability of paper-based friction materials were studied, of which the contents are varied but the geometries are the same as used in real applications. The relationship between the degree of carbonization and the durability was discussed in several terms of mechanical property changes of the material. The friction and thermal durability tes

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Liu, Yang, Jianhua Liu, and Yang He. "Evolution Behavior and Closure Mechanism of Porosity in Large Billet during the Reduction Pretreatment." Metals 12, no. 4 (2022): 599. http://dx.doi.org/10.3390/met12040599.

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The reduction pretreatment process was proposed to be applied to large billets for the purpose of alleviating the center porosities and reducing the rolling ratio. This study focused on the evolution behavior and closure mechanism of porosity in a large billet during reduction pretreatment. The porosities were characterized by ultrasonic scanning and 3D reconstruction. The results showed that the porosities near the surface of the billet were firstly closed during the reduction pretreatment. The reduction began to effectively act on the center of the billet at the deformation of 0.16. When the

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28

Martides, Erie, Husaini Ardy, Vincent, Budi Prawara, Endro Junianto, and Edy Riyanto. "Effect of HVOF Air Cap Nozzle Grooves on Cr<sub>3</sub>C<sub>2</sub>+ 20NiCr Coating Characteristics." Key Engineering Materials 940 (January 30, 2023): 115–20. http://dx.doi.org/10.4028/p-r041bm.

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The air cap nozzle grooves were modifying in the HVOF system by adding 2 and 4 vertical grooves to analyze the effect on the quality of the Cr3C2+20NiCr ceramic coating, then compared with the original (smooth) nozzle. With constant parameters of the HVOF process, such as spraying distance, time, and pressure of the gas fuel, this experiment will determine the quality of the coating, namely the thickness, hardness, and porosity observed through the ceramic coating cross-section. The results of porosity analysis using SEM and image analysis show that a nozzle with 4-grooves has a porosity of 2.

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Joydeep, Dutta, Mohini, and Priyanka. "Effect of degree of deacetylation and molecular weight on physicochemical properties of chitosan films." Journal of Indian Chemical Society Vol. 97, May 2020 (2020): 731–35. https://doi.org/10.5281/zenodo.5654847.

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Department of Chemistry, Amity School of Applied Sciences, Amity University Haryana, Gurgaon-122 413, Haryana, India <em>E-mail</em>: dutta_joy@yahoo.co.in <em>Manuscript received online 25 October 2019, revised and accepted 07 January 2020</em> Chitosan is a linear natural polymer obtained by deacetylation of chitin using sodium hydroxide. Depending on the manufacturing process as well as its source, chitosan is commercially available in various types and grades with molecular weights (MW) ranging from 38 to 200 kDa and degree of deacetylation (DD) with a range between 60 to 100%. In this wor

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Lenshin, Aleksandr S., Yaroslav A. Peshkov, Konstantin A. Barkov, et al. "Features of the Composition and Photoluminescent Properties of Porous Silicon Depending on Its Porosity Index." Coatings 13, no. 2 (2023): 385. http://dx.doi.org/10.3390/coatings13020385.

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Porous silicon samples with a porosity index of 5% to 80% were obtained in this work by electrochemical etching, and their photoluminescence properties were also studied. The porosity index was calculated according to the data from X-ray reflectometry. The composition of the surface was controlled by ultra-soft X-ray spectroscopy and infrared (IR) spectroscopy. The degree of the sample surface oxidation increased with the porosity enhancement. Two known mechanisms of photoluminescence in porous silicon were detected that are related to the composition and morphology of its surface. The values

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Ba, Ming Fang, and Chun Xiang Qian. "Evolution of Capillary Porous Structure in Steam Curing Concrete with Mineral Admixtures." Advanced Materials Research 450-451 (January 2012): 3–7. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.3.

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The capillary porous structures of the pre-cast concrete with different initial steam-curing duration were analyzed with MIP techniques. Then the hydration degree of cement, fly ash and slag in pre-cast concrete versus time were obtained respectively by combing the hydrochlorides and EDTA selecting dissolution methods, based on which the corresponding evolution of capillary porosity was determined. The comparison between calculated results and experimental capillary porosity showed that the proposed evolution model of capillary porosity could be adopted to reveal the developing trend of capill

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Stach, Sebastian, Olga Kędzia, Żaneta Garczyk, and Zygmunt Wróbel. "Modelling the degree of porosity of the ceramic surface intended for implants." Biomedical Engineering / Biomedizinische Technik 64, no. 2 (2019): 215–23. http://dx.doi.org/10.1515/bmt-2017-0169.

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Abstract The main goal of the study was to develop a model of the degree of surface porosity of a biomaterial intended for implants. The model was implemented using MATLAB. A computer simulation was carried out based on the developed model, which resulted in a two-dimensional image of the modelled surface. Then, an algorithm for computerised image analysis of the surface of the actual oxide bioceramic layer was developed, which enabled determining its degree of porosity. In order to obtain the confocal micrographs of a few areas of the biomaterial, measurements were performed using the LEXT OL

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Sukhodub, L. F., L. B. Sukhodub, and M. O. Kumeda. "Physical and chemical factors influencing the porosity of apatite-biopolymer composites." Himia, Fizika ta Tehnologia Poverhni 13, no. 3 (2022): 301–10. http://dx.doi.org/10.15407/hftp13.03.301.

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The undamaged structure and functionality of the skeleton are a prerequisite for ensuring the quality of human life. The introduction of the latest treatment methods and prosthetics in traumatic surgery, oncology, cranial surgery, and dentistry form a demand for biomaterials with functionalized properties. The growth of new bone tissue is a cell-regulated process based on creating a specific bone morphology, which combines the organic matrix and its inorganic content. The inorganic component of human bones and teeth is calcium deficiency hydroxyapatite (cdHA), with a molar ratio of Ca/P rangin

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Yu, Tao, Baoge Yun, Pingyi Wang, and Linfeng Han. "Turbulent Kinetic Energy Distribution around Experimental Permeable Spur Dike." Sustainability 14, no. 10 (2022): 6250. http://dx.doi.org/10.3390/su14106250.

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The spur dike is widely used in the waterway renovation project in the upper reaches of the Yangtze River as a remediation structure, but its water destruction is very common, and the influence of the permeable characteristics of the riprap spur dike on its stability has been neglected in many studies. Through the method of combining a generalized flume test and theoretical analysis, the influence of the submerged degree of the permeable spur dike, the porosity of the spur dike body, and the size of the void on its nearby turbulent kinetic energy is studied. The results show that the turbulent

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COSENTINI, R. M., and S. FOTI. "Evaluation of porosity and degree of saturation from seismic and electrical data." Géotechnique 64, no. 4 (2014): 278–86. http://dx.doi.org/10.1680/geot.13.p.075.

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Ma, Hongyan, Biwan Xu, and Zongjin Li. "Magnesium potassium phosphate cement paste: Degree of reaction, porosity and pore structure." Cement and Concrete Research 65 (November 2014): 96–104. http://dx.doi.org/10.1016/j.cemconres.2014.07.012.

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K�lm�n, F., J. Borsa, R. Madar�sz, and I. Ruszn�k. "Iodine sorption, porosity, and wettability of carboxymethylcellulose of low degree of substitution." Colloid & Polymer Science 267, no. 4 (1989): 349–52. http://dx.doi.org/10.1007/bf01413629.

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Ryabicheva, Lyudmila, and Dmytro Usatyuk. "Modelling of Recrystallization Curves of Porous Copper-Titanium Powder Materials." Materials Science Forum 715-716 (April 2012): 965–70. http://dx.doi.org/10.4028/www.scientific.net/msf.715-716.965.

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In this paper, modelling and plotting of recrystallization curves of copper-titanium powder materials with titanium content of 0.5%, porosity 5% and 10%. The mathematical model that describes an influence of temperature, degree of deformation, strain rate, initial grain size and porosity to grain size after deformation has developed. The interconnection of deforming parameters and structure has presented by function of several variables with analytical expression obtained by method of undetermined coefficients based on experimental data. Theoretical recrystallization curves for copper-titanium

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Katre, Shreya, and Archana M. Nair. "Modelling the effect of grain anisotropy on inter-granular porosity." Journal of Petroleum Exploration and Production Technology 12, no. 3 (2021): 763–81. http://dx.doi.org/10.1007/s13202-021-01332-w.

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AbstractPorosity is the dominant factor that determines the exploitable capacity of sedimentary reservoir rocks. Generally, pore heterogeneity is poorly represented in subsurface geological models due to the complexity. Granular mixtures produce complex pore space controlled by grain size, grain shape, and grain sorting. Heterogeneities in pore space volume are present at micro- and nanoscales in granular mixtures due to packing conditions resulting from deposition and diagenesis. In the present study, three-dimensional packing models were generated to provide a realistic description of granul

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Masdari, Fadhlan Fadhlan. "Studi Pengaruh Ukuran Butir Terhadap Porositas dan Konduktivitas Hidrolik Batupasir dan Batulempung (Study of The Effect of Grain Size on Porosity and Hydraulic Conductivity of Sandstone and Claystone)." JURNAL TEKNOLOGI MINERAL FT UNMUL 10, no. 2 (2022): 18. http://dx.doi.org/10.30872/jtm.v10i2.9021.

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AbstrakPorositas dan konduktivitas hidrolik berhubungan langsung dengan aktivitas penambangan, di antaranya pembuatan jalan tambang (ramp) pada front area penambangan. Proses penambangan yang menyebabkan pori-pori tanah semakin kecil (ruang pori berkurang) sehingga porositas mengecil disebabkan pengaruh ukuran butir. Untuk mengetahui pengaruh ukuran butir terhadap porositas batupasir dan batulempung serta pengaruhnya juga klasifikasi nilai porositas dan konduktivitas hidrolik batupasir dan batulempung ini, metode yang digunakan ialah analisis ukuran butir untuk mengetahui besarnya ukuran butir

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Lavauzelle, Nathan, Marja Siitari-Kauppi, Paul Sardini, et al. "Porosity and mineralogy in the Lajas tight gas sandstone reservoir, Neuquén Basin, Argentina." Journal of Sedimentary Research 95, no. 1 (2025): 49–62. https://doi.org/10.2110/jsr.2024.006.

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ABSTRACT In specific subsurface conditions, the sandstones of the Lajas Formation represent a tight gas reservoir in a deltaic mouth-bar system. Therefore, understanding the diagenetic processes that affected these sandstones is a first step towards reservoir quality prediction and production optimization.14C-PMMA autoradiography can be used to characterize the porosity distribution at centimeter-to-micrometer scales. The mineral phases can be associated with specific porosities using scanning electron microscopy (SEM) in the backscattered-electron imaging mode (BSEi) and can be combined with

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Artsanti, Pedy, Yateman Arryanto, and Kusnanto Kusnanto. "Effect of Residence Time of Graphitisation on Thermal Conductivity of Molded Graphite." Indonesian Journal of Chemistry 1, no. 1 (2010): 43–52. http://dx.doi.org/10.22146/ijc.21960.

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The effect of residence time of graphitisation on thermal conductivity of molded graphite has been examined. The examination has been conducted by varying residence time of graphitisation of molded carbon with petroleum coke as raw material and coal tar pitch. Graphitisation has been conducted by heating molded graphite at 2500 °C in argon atmosphere with residention time of 10, 30 and 90 minutes. Graphitisation degree, density, shrinking mass and porosity of molded graphite were examined and so was its thermal conductivity. The result showed that the decrease of porosity and the increase of g

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Wei, Ying, Ziwei Chen, and Hao Wang. "Atomic-Scale Insights into the Effects of the Foaming Degree on the Glass–Ceramic Matrix Derived from Waste Glass and Incineration Bottom Ash." Materials 17, no. 12 (2024): 2820. http://dx.doi.org/10.3390/ma17122820.

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Precise management of the inverse correlation between the total porosity and compressive strength is crucial for the progress of foaming glass–ceramics (FGCs). To deeply understand this relationship, we investigated the atomic-level transformations of five CO2-foaming FGC samples using molecular dynamics simulation. The short-range and intermediate-range structures of the FGCs with varying total porosities (36.68%, 66.28%, 66.96%, 72.21%, and 79.88%) in the system were elucidated. Na cations were observed to exhibit a strong interaction with CO2, accumulating at the surface of the pore wall an

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Sengka, Abraham, and Karmila Laitupa. "PHYSICAL PROPERTIES TESTING OF GABRO AND SERPENTINITE IN SAOKA, SORONG CITY, WEST PAPUA PROVINCE." INTAN Jurnal Penelitian Tambang 5, no. 2 (2022): 69–74. http://dx.doi.org/10.56139/intan.v5i2.152.

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Sorong City, especially in the Saoka area, has a hypothetical gabbro resource of 25,000,000 m3, and in the Rufei area it has a hypothetical serpentinite resource of 500,000 m3. but there is no test on the physical properties of the two rocks, so it is necessary to test the physical properties of gabbro and serpentine to determine the parameters of physical properties such as bulk density, specific gravity, water content, porosity, void ratio, and degree of saturation. The research method used is quantitative by taking samples at the research location and then conducting tests in the laboratory

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Кайль, В. И., К. А. Железнова, and Е. А. Новикова. "SORPTION STUDY OF ALUMINUM OXIDE BASED BLOCK MATERIAL WITH VARIABLE POROSITY." Химическая безопасность / Chemical Safety Science 3, Спецвыпуск(6) (2019): 49–55. http://dx.doi.org/10.25514/chs.2019.special.4.

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Проблема очистки газовых выбросов от опасных летучих соединений может быть решена путем применения эффективных систем очистки. Описано получение экспериментальных образцов блочного материала типа «металлорезина» на основе оксида алюминия с различной степенью порозности, предназначенных для использования в качестве сорбционного материала. Представлены результаты оценки сорбционных свойств полученных образцов (сорбционная способность, степень извлечения при концентрировании и десорбции) в ходе улавливания гексана из воздуха. Возможность варьирования порозности и газодинамического сопротивления с

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De Araújo Reis, Rômulo, Bruna Moraes de Oliveira, Lívia Da Silva Oliveira, and David Barbosa de Alencar. "Study of the Physical Aspects of Residential Soils of Iranduba - AM." International Journal for Innovation Education and Research 7, no. 10 (2019): 82–89. http://dx.doi.org/10.31686/ijier.vol7.iss10.1748.

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The objective of this work is to study the physical indices of soil samples collected in different points of the municipality of Iranduba - Am. The parameters analyzed were moisture content, porosity, aeration degree, specific weight among others. For the physical characterization of the soil, samples with deformed structure were collected, prepared according to procedures described in the standard procedures described by the NBR 6457 standard (ABNT, 1986). The tests were performed using a high precision glass pycnometer. The tests resulted in samples with high voids and porosity, lower values

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Benz, Willy, and Martin Jutzi. "Collision and impact simulations including porosity." Proceedings of the International Astronomical Union 2, S236 (2006): 223–31. http://dx.doi.org/10.1017/s1743921307003262.

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AbstractThe Smooth Particle Hydrodynamics (SPH) impact code (Benz & Asphaug 1994) has been developed for the simulation of impacts and collisions involving brittle solids in the strength-and gravity-dominated regime. In the latter regime, the gravitational overburden is used to increase the fracture threshold. In this paper, we extend our numerical approach to include the effect of porosity at a sub-resolution scale by adapting the so-called P -α model (Herrman 1969). Using our extended 3D SPH impact code, we investigated collisions between porous bodies to examine the sensitivity of colli

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Houghton, James E., Thomas E. Nichols, and Richard H. Worden. "Simulating Compaction and Cementation of Clay Grain Coated Sands in a Modern Marginal Marine Sedimentary System." Geosciences 14, no. 10 (2024): 268. http://dx.doi.org/10.3390/geosciences14100268.

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Reservoir quality prediction in deeply buried reservoirs represents a complex challenge to geoscientists. In sandstones, reservoir quality is determined by the extent of compaction and cementation during burial. During compaction, porosity is lost through the rearrangement and fracture of rigid grains and the deformation of ductile grains. During cementation, porosity is predominantly lost through the growth of quartz cement, although carbonate and clay mineral growth can be locally important. The degree of quartz cementation is influenced by the surface area of quartz available for overgrowth

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Liu, Qiao, Jordon S. Hilliard, Zhongzheng Cai, and Casey R. Wade. "Comparative study of metal–organic frameworks synthesized via imide condensation and coordination assembly." RSC Advances 14, no. 38 (2024): 27634–43. http://dx.doi.org/10.1039/d4ra05563b.

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Shen, Jingfang, Xu Zhang, Wenwei Liu, and Ying Zhang. "Fractal study in soil spatial variability and thermal conductivity." Thermal Science 23, no. 5 Part A (2019): 2849–56. http://dx.doi.org/10.2298/tsci190109199s.

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This paper takes advantage of fractal method to research some soil characteristics through case analysis. The multifractal spectrum and random Sierpinski carpet are used to describe the spatial variability and thermal conductivity of soil quantitatively. On the basis of predecessors, the scatter plots of various types of data have been used to supplement the multifractal results in a more detailed way. It turns out that the content of clay, silt, and coarse sand could reflect the degree of spatial variability of soil. Then based on this case, the effect of porosity on soil thermal conductivity

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