Relevant bibliographies by topics / Porosity Reduction Model

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Academic literature on the topic 'Porosity Reduction Model'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Porosity Reduction Model"

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Gal, Doron, Jack Dvorkin, and Amos Nur. "A physical model for porosity reduction in sandstones." GEOPHYSICS 63, no. 2 (1998): 454–59. http://dx.doi.org/10.1190/1.1444346.

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The experimental elastic moduli‐porosity trends for clean sandstones can be described by the modified upper Hashin‐Shtrikman (MUHS) bound. One geometrical (but not necessarily geological) realization is: as porosity decreases, the number of the pores stays the same and each pore shrinks while maintaining its shape. This concept of uniform porosity reduction implies that permeability is proportional to the effective porosity squared, and that formation factor is proportional to the inverse of the effective porosity. The effective porosity here refers to the part of the pore‐space that dominates
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Yang, Jiakun, Zhou Qiu, and Chuanfeng Zheng. "Noise Reduction Effect of Porous Asphalt Pavement Based on Acoustic-Structure Coupling Model." Environmental and Earth Sciences Research Journal 8, no. 2 (2021): 97–102. http://dx.doi.org/10.18280/eesrj.080206.

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Nowadays, the traffic noise problem is becoming increasingly prominent. In order to study the influence of porosity and pore depth on the noise reduction performance of asphalt pavement, this paper used the software COMSOL Multiphysics to establish acoustic-structure coupling models, and simulated the sound absorption and noise reduction effect of asphalt pavement under 10%, 15%, 20%, 25%, and 30% porosity; moreover, under the condition of unchanged asphalt pavement porosity, the sound absorption and noise reduction effect of asphalt pavement under 3cm, 4cm, 5cm, 6cm, and 7cm pore depth was st
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Stepanov, S., A. Grigorev, M. Vasilyeva, D. Nikiforov, and D. Spiridonov. "Multiscale model reduction of fluid flow based on the dual porosity model." Journal of Physics: Conference Series 1158 (February 2019): 042025. http://dx.doi.org/10.1088/1742-6596/1158/4/042025.

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Meng, Xiang Tao, Wang Lin Li, Xi Wang, and Xiao Yan Wei. "Study of Numerical Modeling for Reduction Rate of Porosity of Sand under Equal Amplitude Cyclic Loading." Applied Mechanics and Materials 353-356 (August 2013): 2652–57. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.2652.

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According to the geological conditions and operating regimes of Wang river groundwater reservoir of Laizhou in Shandong, through doing sandy one-dimensional equal amplitude circulating compression test, the effect of groundwater level repeated rising or falling on volumes of groundwater reservoir is simulated, the character of porosity changing regulation with circulating period is analyzed, the relation between reduction rate of porosity and circulating period is summarized, and the hyperbolic model of reduction rate of porosity and circulating period is constructed initially, the concept of
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Ren, Ting Zhi, Xue Liang Shi, Xin Jin, and Pei Pei Han. "Study on Prediction of Reduction Position Based on Solidification and Heat Transfer Model." Applied Mechanics and Materials 487 (January 2014): 540–43. http://dx.doi.org/10.4028/www.scientific.net/amm.487.540.

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As one of the important parameters of dynamic soft reduction technology, reduction position seriously affects the using effect of this technology to decrease center segregation and porosity of continuous casting slabs. According to the actual production conditions, a two-dimensional solidification and heat transfer model was established. In order to obtain more accurate model, the heat transfer coefficient was amending by the pin shooting technique in measuring shell thickness. The laws of the effect of casting speed, superheat degree and specific water flow on reduction position were analyzed
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Rahbari, R. G., N. H. Abu Kasim, A. A. Madfa, M. Hamdi, and M. Bayat. "Porosity reduction model in titanium–hydroxyapatite FGM composites using shrinkage measurement." Materials Research Innovations 15, sup2 (2011): s110—s113. http://dx.doi.org/10.1179/143307511x13031890748281.

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Lee, Yun, Seung-Jun Kwon, and Ki-Tae Park. "Simplified Carbonation Model Considering Ca(OH)2 Solubility and Porosity Reduction." Journal of the Korea institute for structural maintenance and inspection 19, no. 1 (2015): 128–38. http://dx.doi.org/10.11112/jksmi.2015.19.1.128.

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Canals, Martin, and Jean Dominique Meunier. "A model for porosity reduction in quartzite reservoirs by quartz cementation." Geochimica et Cosmochimica Acta 59, no. 4 (1995): 699–709. http://dx.doi.org/10.1016/0016-7037(94)00355-p.

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Senin, A. V. "Carbon in Solidphase Reduction of Oxides." Materials Science Forum 870 (September 2016): 578–83. http://dx.doi.org/10.4028/www.scientific.net/msf.870.578.

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The gasphase-solidphase model is used to explain the results of solid chromite ore carbothermic reduction. The reducing agent is carbon atoms. Carbon is brought to the surface of chromite grains by gaseous carbon-containing molecules and radicals, such as C3O2, CH4, CH3, CH2, CH, C2H2 and other carbon containing particles. Gas particles penetrate a piece of ore through the pores and cracks. Active carbon atoms C are formed by the dissociation of gaseous particles. Reduction by carbon is carried out on the chromite grain surface due to the cations and anions diffusion in the oxide lattice towar
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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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Book chapters on the topic "Porosity Reduction Model"

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Christensen S.O., Svanø G., and Skomedal E. "Geomechanical model for sediment profiles." In Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering. IOS Press, 2009. https://doi.org/10.3233/978-1-60750-031-5-642.

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Idealized sediment profiles based on the tangent modulus concept have been developed over some years. The aim of this study was to extend and refine this model. A methodology based on an existing geomechanical model for estimation of porosity and density profiles for natural sediments, including sands and sandstones, and clays and claystones or shales have been developed. This paper describes some of the basis for the development of the geomechanical model, interpretation of laboratory tests and field data from wells, and some results using the model. The bounding values of the controlling par
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Liu, Jia, Tonghua Zou, Hongxuan Li, and Qingling Hui. "Numerical Study on the Effect of Geometric Parameters on the Heat Transfer Performance of Finned-Tube Adsorption Bed." In Advances in Transdisciplinary Engineering. IOS Press, 2023. http://dx.doi.org/10.3233/atde230474.

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Due to the benefits in terms of conserving energy and emission reduction, which are coincident with the current energy development trend, adsorption refrigeration technology has gained popularity. The central part of the adsorption refrigeration system is the adsorption bed, in which heat transfer performance has a direct impact on the system’s efficiency. A numerical model of a finned-tube heat exchanger in a silica-gel water adsorption refrigeration system has been built as a numerical model for this study. A mathematical model along with Darcy’s law has been considered to take into the effe
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Castro, Paulo Victor Silva Avelino de, Isabelle Tanne Couto e. Silva, and Paula Mello Martins. "Reinforcement design using geosynthetics for foundations with probability of dolinamento: Analytical calculation and numerical stress-strain model." In CHALLENGES AND INNOVATIONS IN EDUCATION: SCIENTIFIC PERSPECTIVES. Seven Editora, 2024. http://dx.doi.org/10.56238/chaandieducasc-036.

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Karst zones are defined by their high solubility, porosity and consequence of subsidence occurrences. Considering that about 20% of of ice-free land is made up of karst regions, the present work aimed to reinforce by geosynthetics a hypothetical foundation subject to windings through the analytical methodology of Briançon and Villard (2007) and by modeling numerical stress-strain in RS2 software (Rocscience). Initially, a hypothetical foundation to be strengthened was defined, in which there is the presence of circular dolines of a maximum of 3 meters in diameter. For the determination of the
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Heubeck, Christoph, Kenneth Story, Pat Peng, Claire Sullivan, and Stuart Duff. "An Integrated Reservoir Study of the Liuhua 11-1 Field Using a High-Resolution Three-Dimensional Seismic Data Set." In Seismic Imaging of Carbonate Reservoirs and Systems. American Association of Petroleum Geologists, 2004. https://doi.org/10.1306/m81928c7.

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Abstract Liuhua 11-1 field, located in the Pearl River Mouth Basin offshore south China, consists of diagenetically altered Miocene limestone comprising a shallow-water carbonate bank. This bank forms the topmost and youngest interval of a larger, extensively karsted, buried carbonate platform. A three-dimensional (3-D) seismic survey of Liuhua field yielded a very high-resolution data set (>200 Hz), allowing a spatial resolution less than 5 m. This data set was subsequently used to produce a reservoir model that closely linked petrophysical, log, and seismic data. The carbonate stratig
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Ali, Syed Haroon, Michael C. Pöppelreiter, Saw Bing Bing, and Mumtaz M. Shah. "Facies, Stratigraphy, and Diagenesis of a Miocene Buildup, Central Luconia Province, Malaysia." In Cenozoic Isolated Carbonate Platforms—Focus Southeast Asia. SEPM (Society for Sedimentary Geology), 2023. http://dx.doi.org/10.2110/sepmsp.114.12.

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Middle to late Miocene carbonates from Central Luconia, offshore Sarawak, Malaysia, contain significant hydrocarbon reserves. However, the complex pore system of the carbonate reservoir poses drilling and production challenges, such as water coning. Moreover, capturing and storing CO2 in depleted carbonate buildups requires the pore type architecture to be well understood. The aim of this study was to investigate pore types in a stratigraphic context and to propose a 3D conceptual model of the pore type distribution. The case study discussed here is the E11 Field. E11 is considered the type lo
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Conference papers on the topic "Porosity Reduction Model"

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Casari, Nicola, Alessio Suman, and Michele Pinelli. "Porosity Driven Approaches to Model Fouling Effects on Flow Field." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91631.

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Abstract Air contamination by solid particles represents a real hazard for compressors for both heavy-duty and aero-propulsion gas turbines. Particles impacting the inner surfaces of the machine can stick to such surfaces or erode them. The presence of deposits entails the reduction in performance of the machinery. As the severity of the problem increases, the performance reduction can become so big to demand engine shut-down and off-line washing. Numerical modeling is one of the techniques employed for tackling the fouling problem. In this work, an innovative procedure is proposed in order to
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Remmal, Al Mahdi, Stéphane Marie, and Jean-Baptiste Leblond. "New Model for Ductile Rupture Under Cyclic Loading Conditions." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93836.

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Abstract Experiments have shown that ductile failure occurs sooner under cyclic loading conditions than under monotone ones. This reduction of ductility probably arises from an effect called “ratcheting of the porosity” that consists of a continued increase of the mean porosity during each cycle with the number of cycles. Improved micromechanical simulations confirmed this interpretation. The same work also contained a proof that Gurson’s classical model for porous ductile materials does not predict any ratcheting of the porosity. In a recent work [6], the authors proposed a Gurson-type “layer
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Tang, Huan, Xiaoding Ma, Raj Thangaraj, and Jing Gui. "Growth Randomness, Porosity, and Surface Coverage of Carbon Films." In ASME/STLE 2002 International Joint Tribology Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/2002-trib-0250.

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Mathematical models that describe the static growth processes of sputtered and ion-beam deposited amorphous carbon films are established. Two important factors are considered in deriving the models: the film porosity and the growth randomness. The growth randomness for both hydrogenated sputter carbon and hydrogenated ion-beam carbon films are deduced from the film roughness vs. film thickness data obtained from X-ray reflectometry. The porosities of the two types of films are estimated from the experimentally determined values of film densities and sp3/sp2 C–C bonding ratios. The derived film
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Mohan, Ram V., and Nikhil Ingle. "Prediction of Porosity and its Mechanisms in Metal Additive Manufacturing." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-96918.

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Abstract Selective Laser Melting (SLM) is an up-and-coming additive manufacturing technique that uses a laser as the power source and is specially developed for 3D Printing metal alloys. SLM advancement is significant since it can create custom property parts, reduce material usage and design freedom, and quickly manufacture complex components. The high energy density of laser generates various unwanted structural defects such as keyholes and porosity, which results in crack formation & distortion, and subsequent reduction in mechanical strength of the components. The present work aims to
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Chidambaram, Prasanna, Pankaj Kumar Tiwari, Parimal A. Patil, et al. "Importance of 3-Way Coupled Modelling for Carbon Dioxide Sequestration in Depleted Reservoir." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206156-ms.

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Abstract Carbon sequestration is the process of capturing and storage of atmospheric carbon dioxide. The objective of any carbon sequestration project is to store CO2 safely for hundreds or thousands of years with a goal of reducing global climate change. A depleted hydrocarbon reservoir is one of the potential storage sites being considered for long-term CO2 storage. The dynamic, geochemical, and geomechanics changes that occur during CO2 injection are inter-related. For example, when injected CO2 causes dissolution of reservoir rock, on one hand, porosity increases while rock strength decrea
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Fu, Pei, Min Zeng, and Qiuwang Wang. "Effect of Gradient Anode on Mass Transfer Performance for Anode-Supported Planar Solid Oxide Fuel Cells." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66095.

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For anode-supported planar solid oxide fuel cells (SOFCs), the thick anode support layer (ASL) prevents the supply of fuel gas to the anode functional layer (AFL) where the electrochemical reactions take place. Shortage of the fuel gas at the active region results in concentration polarization. SOFC designs with porosity gradient anode may improve the cell performance. In order to investigate the effect of the porosity distributions on mass transfer characteristics of SOFC, a three dimensional half-cell model is developed based on the computational fluid dynamics (CFD) method. The numerical mo
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Zaidin, M. F., S. M. Amin, F. J. Azuddin, et al. "Enhancing CO2-H2S Storage Predictions in High H2S Fields: Improving Model Accuracy and Kinetic Rate Information." In International Petroleum Technology Conference. IPTC, 2024. http://dx.doi.org/10.2523/iptc-23878-ea.

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Abstract In the context of carbon capture and storage (CCS), the presence of impurities, such as Hydrogen Sulfide (H2S), in the injected Carbon Dioxide (CO2) stream poses a significant challenge (Bennion and Bachu, 2008). This challenge is particularly pronounced in carbonate reservoirs due to the potential precipitation of the minerals (Ahmad et al., 2023). Such precipitation can have detrimental effects on carbonate rock properties, including a reduction in rock porosity and permeability (Labus & Suchodolska, 2017; Clark et al., 2018). Ultimately, these changes can impact injectivity and
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Remmal, Al Mahdi, Stéphane Marie, and Jean-Baptiste Leblond. "Experimental Determination of the Ratcheting of the Porosity for the Study of Ductile Rupture Under Cyclic Loading Conditions." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93831.

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Abstract It is known that for ductile porous materials, cyclic loadings lead to lower fracture strains than monotone ones. This reduction of ductility probably arises from an effect called “ratcheting of the porosity” that consists of a continued increase of the mean porosity during each cycle with the number of cycles. Finite element based micromechanical simulations confirmed this interpretation. Recently the authors proposed a Gurson-type “layer model” better fit that Gurson’s original one which does not predict the ratcheting of the porosity, for the description of the ductile behavior und
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Roshandel, R., B. Farhanieh, and E. Saievar-Iranizad. "The Effects of Porosity Distribution Variation in GDL on PEM Fuel Cell Performance." In ASME 2004 2nd International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2004. http://dx.doi.org/10.1115/fuelcell2004-2525.

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Gas diffusion layers are one of the important parts of the PEM fuel cell as they serve to transport to transport the reactant gases to the catalyst layer. Porosity of this layer has a large effect on the PEM fuel cell performance. The spatial variation in porosity arises due to two effects: 1. Compression of the electrode on the solid landing areas and 2. Water produced at the cathode side of gas diffusion layers. Both of these factors change the porosity of gas diffusion layers affects fuel cell performance. To implement this performance analysis, a mathematical model which considers oxygen a
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Khoda, A. K. M. B., and Bahattin Koc. "Functionally Heterogeneous Porous Scaffold Design for Tissue Engineering." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-86927.

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Most of the current tissue scaffolds are mainly designed with homogeneous porosity which does not represent the spatial heterogeneity found in actual tissues. Therefore engineering a realistic tissue scaffolds with properly graded properties to facilitate the mimicry of the complex elegance of native tissues are critical for the successful tissue regeneration. In this work, novel bio-mimetic heterogeneous porous scaffolds have been modeled. First, the geometry of the scaffold is extracted along with its internal regional heterogeneity. Then the model has been discretized with planner slices su
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Reports on the topic "Porosity Reduction Model"

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Baten, Bayezid, Matthew Gombeda, and Nishant Garg. Utilizing a Particle-packing Approach for an Illinois-specific, Nonproprietary, Low-shrinkage UHPC. Illinois Center for Transportation, 2024. http://dx.doi.org/10.36501/0197-9191/24-021.

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Ultra-high-performance concrete (UHPC) represents the next generation of concrete, with a strength 3-4 times greater than traditional concrete (100-120 MPa as opposed to 30-40 MPa). However, most of the commercial UHPC mixes are proprietary and expensive. In this project, we document the development of nonproprietary, cost-effective UHPC mixes primarily using locally sourced or pre-qualified materials in Illinois. The research utilizes the modified Anderson and Andreasen packing model to establish a new parameter: “packing factor” that has a significant influence on the design and performance
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