Relevant bibliographies by topics / Permanent Porosity

Academic literature on the topic 'Permanent Porosity'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Permanent Porosity.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Permanent Porosity"

1

Giri, Nicola, Mario G. Del Pópolo, Gavin Melaugh, Rebecca L. Greenaway, Klaus Rätzke, Tönjes Koschine, Laure Pison, Margarida F. Costa Gomes, Andrew I. Cooper, and Stuart L. James. "Liquids with permanent porosity." Nature 527, no. 7577 (November 2015): 216–20. http://dx.doi.org/10.1038/nature16072.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Jie, Kecheng, Yujuan Zhou, Hugh P. Ryan, Sheng Dai, and Jonathan R. Nitschke. "Engineering Permanent Porosity into Liquids." Advanced Materials 33, no. 18 (March 26, 2021): 2005745. http://dx.doi.org/10.1002/adma.202005745.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Lerma-Berlanga, Belén, Javier Castells-Gil, Carolina R. Ganivet, Neyvis Almora-Barrios, Javier González-Platas, Oscar Fabelo, Natalia M. Padial, and Carlos Martí-Gastaldo. "Permanent Porosity in Hydroxamate Titanium–Organic Polyhedra." Journal of the American Chemical Society 143, no. 50 (December 8, 2021): 21195–99. http://dx.doi.org/10.1021/jacs.1c09278.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Rose, Marcus, Winfried Böhlmann, Michal Sabo, and Stefan Kaskel. "Element–organic frameworks with high permanent porosity." Chemical Communications, no. 21 (2008): 2462. http://dx.doi.org/10.1039/b718925g.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Wang, Xi-Sen, Shengqian Ma, Daofeng Sun, Sean Parkin, and Hong-Cai Zhou. "A Mesoporous Metal−Organic Framework with Permanent Porosity." Journal of the American Chemical Society 128, no. 51 (December 2006): 16474–75. http://dx.doi.org/10.1021/ja066616r.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Zhang, Xuan, Zhijie Chen, Xinyao Liu, Sylvia L. Hanna, Xingjie Wang, Reza Taheri-Ledari, Ali Maleki, Peng Li, and Omar K. Farha. "A historical overview of the activation and porosity of metal–organic frameworks." Chemical Society Reviews 49, no. 20 (2020): 7406–27. http://dx.doi.org/10.1039/d0cs00997k.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Hisaki, Ichiro, Chen Xin, Kiyonori Takahashi, and Takayoshi Nakamura. "Designing Hydrogen‐Bonded Organic Frameworks (HOFs) with Permanent Porosity." Angewandte Chemie International Edition 58, no. 33 (August 12, 2019): 11160–70. http://dx.doi.org/10.1002/anie.201902147.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Alduhaish, Osamah, Bin Li, Vladimir Nesterov, Hadi D. Arman, Khalid Alfooty, Abdullah M. Asiri, Hailong Wang, and Banglin Chen. "Two structurally different praseodymium-organic frameworks with permanent porosity." Inorganic Chemistry Communications 45 (July 2014): 89–92. http://dx.doi.org/10.1016/j.inoche.2014.04.016.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Hisaki, Ichiro, Xin Chen, Kiyonori Takahashi, and Takayoshi Nakamura. "Berichtigung: Designing Hydrogen‐Bonded Organic Frameworks (HOFs) with Permanent Porosity." Angewandte Chemie 131, no. 42 (October 7, 2019): 14938. http://dx.doi.org/10.1002/ange.201909732.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Hisaki, Ichiro, Xin Chen, Kiyonori Takahashi, and Takayoshi Nakamura. "Corrigendum: Designing Hydrogen‐Bonded Organic Frameworks (HOFs) with Permanent Porosity." Angewandte Chemie International Edition 58, no. 42 (October 7, 2019): 14794. http://dx.doi.org/10.1002/anie.201909732.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Permanent Porosity"

1

Vasquez, Julia Barbara Ann. "Constructing a Transient Permanence." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78261.

Full text
Abstract:
A residence hall is a temporary home. Yet, it can be the most impactful campus environment on a student's education and life. From lifelong friendships to retention rates, residence halls affect students as many experience their first opportunity to express their individuality and personal responsibility. No study can conclusively determine that one residence hall type is better than another. Rather, it is a hall's overall gestalt that determines student satisfaction and a positive perception of community. The question of my thesis explores how residence hall architecture can anticipate its role as an inspiring distraction to the individual that provokes interaction, engagement, and community as a building type that is not quite transient and not quite permanent.
Master of Architecture
APA, Harvard, Vancouver, ISO, and other styles
2

Hamouz, Vladimír. "Porovnání cen smíšených trvalých porostů zjištěných zjednodušeným způsobem a způsobem výnosovým nebo nákladovým." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-232805.

Full text
Abstract:
The thesis deals compare prices mixed permanent crops that are established for the property transfer tax or gift tax from prices established for other purposes. For the determination of the prices is used method of simplified and in a yield or cost method.
APA, Harvard, Vancouver, ISO, and other styles
3

Hůlová, Martina. "Porovnání cen okrasných rostlin zjištěných zjednodušeným a nákladovým způsobem s různou charakteristikou typu zeleně." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-232711.

Full text
Abstract:
The aim of this diploma thesis is to compare prices of ornamental plants founded by simplified and cost method of valuation. Comparison was made on a sample of garden situated in the functional unit with a terraced house and the land built over by this building. Based on the obtained results the influence of different location and age of the trees on their price is evaluated. The thesis also defines basic terms and explains issues which are closely related with valuation of ornamental plants.
APA, Harvard, Vancouver, ISO, and other styles
4

Nečasová, Barbora. "Oceňování nemovitostí typu rekreačního střediska - Zubří." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-232905.

Full text
Abstract:
The diploma thesis "Valuation of property type resort" deals with both the development of a comprehensive register of all immovable property, forming part of the accessories and recreational area in “Zubří” and also with the valuation of these assets, which will result in the determination of prices that should be required when its sale. The issue of valuation is not easy and extends into several areas. The first part of this work, the theoretical part, focuses on the definition and clarification of basic terms as from the field of valuation same as the terms of the law and economics. It further, various valuation methods are described in more detail and these are then used in the practical part. At the beginning of the practical part the location of the real estate same as the results of a market analysis and data obtained from the local investigation are described briefly. The results of the valuation are evaluated and analyzed in more detail in the conclusion of the thesis.
APA, Harvard, Vancouver, ISO, and other styles
5

Šťastný, Miroslav. "Oceňování nemovitostí typu letní tábor." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-232744.

Full text
Abstract:
Diploma thesis “Property valuation type of summer camp” is focused on recording and valuation of all the immovable property, which are parts and outbuildings of summer camp near the Vranov dam. Theoretical part of this thesis deals with basic terminology and utilized valuation methods. Short locality characterization and relevant real estate market are described in the practical part. Main focus of the practical part is actual valuation of immovable property using methods described in theoretical part. After that, calculated and estimated prices are evaluated and analyzed.
APA, Harvard, Vancouver, ISO, and other styles
6

SEJPKOVÁ, Jana. "Vliv různých způsobů obhospodařování na travní porosty." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-174527.

Full text
Abstract:
The aim of this thesis is to assess the impact of farming on grassland and assess the frequency of use of grassland on yield and quality of forage biomass. A part of this thesis is also a recommendation of possible management changes of evaluated grasslands. Botanical inventory surveys were conducted on agricultural lands Bílovské zemědělské a.s., in the northern Plzeň region. There have been selected three sites, two meadows and one pasture vegetation. The comprehensive analysis of the stand composition was created by agrotechnology of meadows. An important part of this thesis is to assess the impact of different grassland management practices with regard to their economic, social and ecological importance.
APA, Harvard, Vancouver, ISO, and other styles
7

TRNKOVÁ, Ivana. "Vliv pastvy masného skotu na utváření porostové skladby a rozvíjení mimoprodukčních funkcí travních porostů." Master's thesis, 2007. http://www.nusl.cz/ntk/nusl-80428.

Full text
Abstract:
The influence of beef cattle pasture on the composition of pasture herbage was studied in Šumava region (Kaplice, 550 {--} 850 m a.s.l) from 2005 to 2006. Also was studied the effect of different nanagement of permanent grassland on its composition plantation form and non-producing functions. On the pasture herbage dominated grass and leguminous species. On the fallow land prevailed herb species. On the combined management site (pasture and harvest) was established higher frequency of Taraxacum officinale, Trifolium pratense and Dactylis glomerata
APA, Harvard, Vancouver, ISO, and other styles
8

Axlerová, Marie. "Vliv pastvy skotu a ovcí na druhovou skladbu travních porostů." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-94925.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

BÁRTA, Ondřej. "Vliv vodního režimu na vybrané travní energetické druhy (suchovzdornost) ovsík vyvýšený (Arrhenatherum elatius), sveřep horský (Bromus carharticus) a bojínek luční (Phleum pratense)." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-174559.

Full text
Abstract:
This thesis describes the importance and use of permanent grasslands, or more so-called energy grasses used in the energy sector. For our study we examined these three grasses: Ovsík vyvýšený (Arrhenatherum elatius), Sveřep horský (Bromus carharticus) and Bojínek luční (Phleum pratense). Another, the main task was to determine their resistance to drought. The results based on laboratory work, which between them compared the two variants. One was simulated normal emergence of the species and the second emergence stressed by lack of water. Based on these results, we conclude that we can not say that it would be a downright drought-resistant types. For the two studied species of grasses (Bojínek and Ovsík) are obvious differences in resistance to drought. Sveřep horský (variety - Tacit), however, proved to be the most drought-resistant species. While most sprouted out bojínek luční (variety - Sobol).
APA, Harvard, Vancouver, ISO, and other styles
10

VÁCLAVÍK, Petr. "Vliv různých způsobů agrotechniky a využití na fytocenologické složení travních porostů." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-52921.

Full text
Abstract:
Aim is to assess the impact of farming methods and frequency of use of grassland on the yield and quality of forage biomass of grasslands and draft recommendations for use of certified grass.The observed area was around Kašperské Mountains, where, three different pastures. Botanical images were carried out in the pasture Lídlovy Dvory, Nebe and Ovčárna. Subsequently, analysis was performed with stand composition farming techniques.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Permanent Porosity"

1

Guilluy, D. Effets des couvertures permanentes sur la porosité d'andosols cultivés: Étude des propriétés physiques et du fonctionnement hydrodynamique de l'horizon cultural. [Saint-Denis]: Laboratoire de physique du sol, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kaufman, J. Gilbert, and Elwin L. Rooy. Aluminum Alloy Castings. ASM International, 2004. http://dx.doi.org/10.31399/asm.tb.aacppa.9781627083355.

Full text
Abstract:
Aluminum Alloy Castings: Properties, Processes and Applications is a practical guide to the process, structure, property relationships associated with aluminum alloy castings and casting processes. It covers a wide range of casting methods, including variations of sand casting, permanent mold casting, and pressure die casting, showing how key process variables affect the microstructure, properties, and performance of cast aluminum parts. Other chapters provide similar information on the effects of alloying and heat treating and the influence and control of porosity and inclusions. A significant portion of the book contains curated collections of property and performance data, including many previously unpublished aging response curves, growth curves, and fatigue curves; tensile properties at high and low temperatures and at room temperature after high-temperature exposure; the results of creep rupture tests conducted at temperatures from 212 to 600 °F (100 to 315 °C); and stress-strain curves obtained from casting alloys in various tempers under tensile or compressive loads. The book also discusses the factors that contribute to corrosion and fracture resistance and includes test specimen drawings as well as a glossary of terms. For information on the print version, ISBN 978-0-87170-803-8, follow this link.
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Permanent Porosity"

1

Li, Yaxiong, Feng Wang, Xiangcheng Li, Pingan Chen, and Boquan Zhu. "Optimized Mechanical Properties and Oxidation Resistance of Al2O3-B4C-C Refractory Ceramics." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220439.

Full text
Abstract:
The effect of B4C addition (0, 3 wt%, 6 wt%, 9 wt%) on the mechanical properties and oxidation resistance of Al2O3-C refractory ceramics was studies in the paper. The results indicated that the addition of B4C could reduce the apparent porosity, increase the mechanical strengths and improve the oxidation resistance. After fired at 1100 °C, the specimen with 6 wt% B4C achieved lowest porosity and permanent linear change. The cold crushing strength was improved from 14.65 MPa to 47.18 MPa. The cold modulus of rupture was significantly improved from 12.1 MPa to 36.29 MPa. When the fired temperature rose to 1450 °C, the lowest porosity and permanent linear change were obtained when B4C additive was 3 wt%. CCS was significantly improved from 12.40 MPa to 57.32 MPa. CMOR was also increased from 7.16 MPa to 28.71 MPa correspondingly. Meanwhile, the oxidation index could be also reduced from 47.6% to 3.9% when B4C content was 6 wt%. These improved properties were due to the formation of liquid phase B2O3 by the reaction between B4C and O2/CO. The compact structure was constructed by volumetric expansion of B2O3.
APA, Harvard, Vancouver, ISO, and other styles
2

Sartowska, Bożena, Wojciech Starosta, Janwei Ren, and Philiswa Nosizo Nomngongo. "More MOFs – less mess: State of art and MOFs application perspectives." In Waste PET-MOF-Cleanwater: Waste PET-Derived Metal-Organic Framework (MOFs) as Cost-Effective Adsorbents for Removal of Hazardous Elements from Polluted Water, 1–18. UJ Press, 2022. http://dx.doi.org/10.36615/9781776419463-01.

Full text
Abstract:
Metal-organic frameworks (MOFs) is a class of compounds consisting of metal ions or clusters coordinated to organic ligands to form one-, two-, or three - dimensional structures. MOFs are formed by anchoring metal-containing units or secondary-building units (SBUs) with organic linkers. Open frameworks that show exceptional features of permanent porosity, stable framework, enormous surface area, and pore volume are obtained. Due to these properties, MOFs are of interest for many different applications, including storage of gases, gas purification, gas separation, water remediation, and catalysis. They can also be used as conducting solids and supercapacitors. The wide range of different applications makes MOFs very important materials in our lives, for example, in areas of health, environment, and energy.
APA, Harvard, Vancouver, ISO, and other styles
3

Sridevi, Gopathy, and Seshadri Srividya. "Novel Dental Implants with Herbal Composites: A Review." In Dentistry. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.101489.

Full text
Abstract:
Missing a permanent tooth is a miserable condition faced by a common man. A tooth decay, periodontitis, mechanical trauma, or any systemic complications lead to such a complication. These bone defects when left untreated lead to severe resorption of the alveolar bone. A proper dental filling with an appropriate bone substitute material could prevent such resorption and paves a way for subsequent implant placement. Dental implants are considered as the prime option by dentists to replace a single tooth or prevent bone resorption. A variety of bone substitutes are available differ in origin, consistency, particle size, porosity, and resorption characteristics. Herbal composites in dentistry fabricated using biphospho-calcium phosphate, casein, chitosan, and certain herbal extracts of Cassia occidentalis, Terminalia arjuna bark, Myristica fragans also were reported to possess a higher ossification property, osteogenic property and were able to repair bone defects. C. occidentalis was reported to stimulate mineralization of the bone and osteoblastic differentiation through the activation of the PI3K-Akt/MAPKs pathway in MC3T3-E1 cells of mice. This implant proved better osteoconductivity and bioactivity compared to pure HAP and other BCP ratios. Terminalia Arjuna was also worked in the incorporation in the graft to enhance the osteogenic property of the implant and gave good results. Another implant bone graft was synthesized containing BCP, biocompatible casein, and the extracts of Myristica fragans and subjected to in vitro investigations and the results revealed the deposition of apatite on the graft after immersing in SBF and also the ALP activity was high when treated with MG-63 cells, NIH-3 T3, and Saos 2 cell lines. This study indicates that the inclusion of plant extract enhances the osteogenic property of the graft. Thus, these novel dental implants incorporated with herbal composites evaluated by researchers revealed an enhanced bone healing, accelerates osseointegration, inhibits osteopenia, and inhibits inflammation. This application of herbal composite inclusion in dentistry and its applications has a greater potential to improve the success rate of dental implants and allows the implications of biotechnology in implant dentistry.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Permanent Porosity"

1

Cook, Daniel P., Sachin S. Deshmukh, and David P. Carey. "Modeling Permanent Mold Casting of Aluminum." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42409.

Full text
Abstract:
Modeling the complex, coupled fluid flow, heat transfer and solidification phenomena taking place in metal casting is a challenging task. The quality of any metal casting depends on many parameters such as the type of mould, rate of filling, and rate of solidification. Optimization of these operational parameters is very important in reducing casting defects such as oxide inclusions and porosity. This paper addresses the first steps in validating a computational fluid dynamics (CFD) model of permanent mold casting of aluminum. A mathematical model of the casting system has been developed using the commercial CFD package StarCD. A physical model of the system has been used to validate the mold filling phenomena in the process. Comparison of the results from these models will be presented.
APA, Harvard, Vancouver, ISO, and other styles
2

Jordon, J. B., and L. Wang. "Monotonic and Cyclic Characterization of Five Different Casting Processes on a Common Magnesium Alloy." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50173.

Full text
Abstract:
The monotonic and cyclic behavior of five different casting processes for AZ91 magnesium alloy is evaluated through microstructure characterization and mechanical testing. A passenger car control arm was cast by squeeze cast, low pressure permanent mold, low pressure permanent mold-electricmagnetic-pump, T-mag, and ablation processes. Samples were cut from twelve locations of the control arm for microstructure characterization. The grain size, porosity fraction, and porosity size were measured via optical microscopy. Different types and sizes of defects were present in each type of casting processes. The mechanical behavior characterization included monotonic tension, and fully-reversed fatigue tests. Sources of fatigue crack initiation were quantified using scanning electron microscopy. For both monotonic and cyclic loading conditions, poor mechanical performance was directly linked to the presence of large pores, oxide films, and/or pore shrinkage clusters.
APA, Harvard, Vancouver, ISO, and other styles
3

Wang, Yaou, and David Schwam. "Application of Bayesian Analysis Method in the Design Optimization of Permanent Casting Mold." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-86413.

Full text
Abstract:
This work is a case study of applying Bayesian analysis, a statistical data method, in the design optimization of permanent test-bar mold. The permanent test-bar mold is used in casting foundry to examine the metal quality. Since the current standard test-bar mold suffers from shrinkage porosity which detracts from best properties, a modified design is recently proposed to improve the mechanical properties. In order to validate the new design, Bayesian data analysis method is utilized to analyze the experimental data from the two designs. The effects of the mold designs and casting process operational parameters on the mechanical properties of castings are compared. Main effect to the mechanical properties is identified based on the Bayesian analysis.
APA, Harvard, Vancouver, ISO, and other styles
4

Khosroshahi, Maryam, Fred Barez, Amer El-Hage, and James Kao. "Dependence of Elastic Properties of Human Femoral Cortical Bone on Porosity." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52318.

Full text
Abstract:
Hip fracture is one of the most serious and common health problems among elderly which may lead to permanent disability or death. Hip fracture commonly occurs in the femoral bone, the major bone in the hip joint. Microscopic age-related changes in the structure of cortical bone is one of the factors that is considered to be partially responsible for the increase of fracture risk in elderly. It is of great interest to develop a predictable model of such fractures for the aging population in preparation of a suitable therapy. These micro structural changes influence mechanical properties and, therefore, behavior of bone and are critical to understand risk and mechanics of fracture of bone. Correlation between cortical bone strength and porosity, as a microscopic structural factor, has been examined frequently as a function of age and/or porosity. These studies have investigated the effect of porosity experimentally and have not studied the effect of porosity independently from other structural factors such as bone mineral density. In this study effect of porosity on elastic properties of human femoral cortical bone was studied independently using finite element analysis assuming transversely isotropic behavior in terms of elastic properties with the axis of elastic properties along the longitudinal axis of femur shaft. In this study, published standard mechanical tests for transversely isotropic materials were simulated using finite element computer simulation on models with different porosities. The developed finite element model utilized material properties based on the best fit regression in previously published articles. Pores’ size, shape and distribution were also modeled based on previous experimental studies. The finite element model, in general, predicted behavior of five independent elastic mechanical properties, namely, longitudinal Young’s modulus, transverse poisson’s ratio, transverse shear modulus, transverse Young’s modulus and longitudinal poisson’s ratio, as a function of porosity. Furthermore, effect of porosity on the elastic properties across various age groups was investigated using published data on age-related changes in bone porosity. Mathematical models based on Finite Element Analysis results have been developed using linear least square regression. These models show negative linear relationship between studied elastic properties of human femoral cortical bone and porosity. The Finite Element Analysis results compared well with the previously published experimental data. Furthermore, the results obtained show the elastic properties as functions of age for females and males. The predicted values for elastic properties are lower for men compared to women of age 20 to 40 years old. However, after the age of 44, elastic properties of femoral cortical bone for men are higher than women. The Finite Element Model developed in this study will help to create a clinical bone model for the prediction of fracture risk or the selection of suitable therapy in orthopedic surgery.
APA, Harvard, Vancouver, ISO, and other styles
5

Das, Apurba, Gopal Agarwal, Kazuaki Inaba, and Amit Karmakar. "Time Dependent Low Velocity Impact Response of Turbomachinery Blade Made of Porous Exponential FGM." In ASME 2019 Gas Turbine India Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gtindia2019-2785.

Full text
Abstract:
Abstract This study presents transient dynamic response of porous and non-porous exponential functionally graded (E-FGM) conical shells subjected to low velocity single and multiple impact. Hertzian contact law in modified form considering permanent indentation is used to calculate the impact response parameters. For finite element formulation eight-noded isoparametric shell element having five degrees of freedom per node is used. The dynamic equations for the low velocity impact problems are solved by Newmark’s time integration scheme. Parametric studies in terms of contact force, initial velocity of impactor, impactor displacement and shell displacement for Stainless Steel-Silicon Nitrite porous and non-porous conical shells (idealized as rotating turbo-machinery blade) under low velocity single and multiple impact are analyzed. Twist angle has significant effect on contact force but has marginal effect on contact duration. Contact force for perfect (porosity free) case is higher than that of porous one and the contact forces are found to decrease with higher porosity factor. Even porous FG conical shell is predicting lower contact force and higher shell displacement than that of uneven porous FG conical shell for a given porosity factor.
APA, Harvard, Vancouver, ISO, and other styles
6

Barua, R., R. Mongrain, H. Aydin, S. Yue, O. F. Bertrand, and D. L. Frost. "Degradation Behavior of Nanostructured Stent Materials Using Cold Spray." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14662.

Full text
Abstract:
Very late stent thrombosis (ST) stent fracture (SF) increases restenosis rate of permanent drug eluting stents (DES). In fact, permanent stents after arterial remodeling (change of artery dimensions during atherosclerosis) process becomes a supportive part inside our body and this idea lead us to develop biodegradable stents which support till arterial remodeling and progressively degrade thereafter. In this research, cold gas dynamic spray technique, simply referred to as cold spray is introduced to spray micro particles on metallic plane and cylindrical substrate. Reference material for permanent stent, stainless steel, 316L is mixed with pure iron in different proportions to induce microgalvanic corrosion effect on as sprayed specimens. Although annealed 316L coatings indicate better ultimate strength, porosity and ductility, their degradation study signifies their poor degradability in Hank’s physiological solution. In contrast to that, immersion and potentiodynamic polarization tests under Hank’s physiological solution indicate that corrosion rate of as sprayed composite increases as amount of iron increases. More iron particles release more iron ions and increases corrosion rate in hanks solution.
APA, Harvard, Vancouver, ISO, and other styles
7

Sazali, Wan Muhammad Luqman bin, and Andreas Busch. "Determination of Caprock Porosity and Permeability Using Drill Cuttings and Core Samples of a Potential CO2 Storage Site – A Case Study." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/211673-ms.

Full text
Abstract:
Abstract Carbon capture and storage (CCS) provides a safe option to reduce carbon footprint on a large scale. Here, carbon dioxide (CO2) is stored in a reservoir formation, overlain by a seal with low permeability and high capillary entry pressure. Understanding CO2 migration through the seal is one of the main components to assess caprock integrity, thereby ensuring safe and long-term CO2 containment and storage. This research is a combined and detailed study of caprock porosity and permeability using core and well log data to overcome a major issue: Coring and logging operation are expensive, and rarely done in caprocks. Drill cuttings, however, are available as byproduct of all drilled wells. By studying the caprock porosity and permeability of a potential CO2 storage site, this study aims to develop porosity/permeability relationships which can be used as input to predict matrix migration and capillary leakage to ensure permanent storage of CO2. In this paper, drill cuttings and core samples, which were obtained from a potential CO2 storage site, went through a series of laboratory measurements to determine porosity and permeability. This includes mercury injection capillary pressure (MICP), unsteady state pulse decay permeability on plug samples, and poro-permeameter measurements on crushed samples. Preliminary results have shown that drill cuttings produce higher porosity and permeability values than core samples. Nevertheless, further analysis is needed to establish relationships and correlations between drill cuttings and core samples. By applying a multi-method approach, resulting in trends for porosity and permeability, we may be able to reduce the operational costs of coring by using drill cuttings as alternatives and at the same time help de-risking CO2 storage projects for wider scale of deployment.
APA, Harvard, Vancouver, ISO, and other styles
8

Grytsai, Denys, Petro Shtefura, and Vadym Dodukh. "A Novel Integrated Approach to 3D Modeling and History Matching of Gas Condensate Fields with Paucity of Geological and Production Data." In SPE Eastern Europe Subsurface Conference. SPE, 2021. http://dx.doi.org/10.2118/208518-ms.

Full text
Abstract:
Abstract A methodology has been developed that, in conditions of limited geological and production data, ensures the integration of petrophysical, geological, and hydrodynamic models as components of a permanent 3D model, establishing physical relationships between parameters that describe the entire system. In the proposed method, the modelling is based on the results of the interpretation of continuous shale volume and porosity curves. Based on the analysis of core data, the multi-vector physical correlations with other parameters are made. To distinguish the reservoirs and non-reservoirs, the cut-off values of shale volume are defined; to exclude tight reservoirs with no filtration, the cut-off values of porosity are set. Using the Winland R35 method the radius of the pore throat is computed, allowing dividing the reservoirs into classes. For each class of reservoirs, the permeability vs porosity dependence is determined, and the Wright-Woody-Johnson method allows deriving equations for the bound water content. A system of configured workflows has been developed and allows automating re-modelling and simplifying its history matching. This technique was successfully applied to several 3D models of gas condensate fields, which, with a significant drilling level on the areas and a long development history, are characterized by limited geological and production data. Workflows System together with the proposed approach allowed simplifying the history matching process by splitting it into several stages. At each stage, depending on the type of input data, various parameters were matched (production, reservoir and wellhead pressures, etc.). Due to cross-functional correlation of all components, the model has significantly reduced the uncertainty parameters and allowed a detailed history matching of the development history for the entire well stock. The results obtained were tested by several geological and technological measures, including drilling new wells, and showed high convergence with the forecast indicators. The proposed approach to modelling and history matching in conditions of limited geological and production data allows: – ensuring integration and correlation of petrophysical, geological, and hydrodynamic models as components of a permanent 3D model; – automating and simplifying the modelling, history matching, and updating a model; – improving the quality of parameters’ matching results.
APA, Harvard, Vancouver, ISO, and other styles
9

Calvert, Monica Anne, Yuri Tsaplin, and Hans Peder Hansen. "Integration of Johan Sverdrup PRM 4D Data Into the Dynamic Model." In SPE Norway Subsurface Conference. SPE, 2022. http://dx.doi.org/10.2118/209541-ms.

Full text
Abstract:
Abstract The Johan Sverdrup field PRM (permanent reservoir monitoring) system has now recorded 2 monitor surveys documenting the progression of the water flood since production and injection began in October 2019 revealing a clear 4D signal linked to the increase in water saturation. The PRM system was installed in two stages in 2019 and 2020 and is a key component of the reservoir monitoring and data acquisition plan with yearly monitor surveys planned to monitor the water flood development. The first seismic acquisition in 2019, referred to as PRM0, covered the initial first stage of installation on the northern part of the field. Stage two of the installation was completed in 2020 and two monitor surveys have since been acquired covering the entire field, in 2020 (PRM1) and 2021 (PRM2). Clear 4D signals can be seen due to the increase in water saturation and show the waterfront moving updip as it pushes the oil towards the producers. The Johan Sverdrup field consists primarily of the intra-Draupne sandstone and the secondary Statfjord sandstone reservoirs. The intra-Draupne sandstone has excellent reservoir quality with an average porosity of 28% and permeabilities ranging from 30-70D. The Statfjord sandstone has an average porosity and permeability of 24% and 4D, respectively. The reservoir is undersaturated and has good lateral and vertical communication. These properties lead to a measurable 4D response when water replaces oil as the water flood progresses through the reservoir. The 4D data is an integral part of the reservoir management program, and together with the geological and production history data, is being used to update the reservoir model to further our understanding of the field development. Examples of the 4D acoustic impedance change generated via a proprietary geostatistical inversion and how it is integrated into the dynamic model will be shown.
APA, Harvard, Vancouver, ISO, and other styles
10

Reppas, N., C. Davie, B. Wetenhall, Y. L. Gui, and J. Ma. "Numerical Simulation of Triaxial Experimental Results on Sandstone Using Critical State Mechanics." In 56th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2022. http://dx.doi.org/10.56952/arma-2022-2184.

Full text
Abstract:
ABSTRACT: In carbon capture and storage schemes, the carbon dioxide (CO2) can be injected at high pressures and low temperatures for permanent storage in deep reservoirs. In the North Sea, the storage sites will be predominantly sandstone. Triaxial tests on sandstone were conducted until failure using representative in-situ stresses to estimate the mechanical properties of the rock. A theoretical constitutive model, using Finite Element Modelling (FEM), describing the stress-strain behavior and damage evolution of rock during triaxial testing, is presented alongside the results of the tests. The model reproduced the experimental outcomes satisfactorily and was used to estimate the critical state mechanic parameters. Lower temperature indicated higher strength on sandstone, a decrease in the Poisson’s ratio and, consequently, damage increase. 1. INTRODUCTION Potential Carbon Capture and Storage (CCS) schemes include injecting liquid carbon dioxide (CO2) from ships into subsea formations for permanent storage. CO2 on a ship is stored at a temperature close to the triple point of CO2 at around -50°C~-57°C and exposed to almost 0.6~0.7 MPa pressure in order to keep the containment of the CO2 mixture in liquid form (Reppas et al., 2021, Wetenhall et al., 2014). The difference between the injected CO2 from a ship and the temperature of the wellbore wall, which is increasing by 30°C/km, is causing temperature fluctuations and external stresses. These loadings and their mechanical effects on the wellbore wall can be described by triaxial tests. Laboratory tests were undertaken to determine how the mechanical properties of sandstone elastic modulus E, Poisson’s ratio n, the shear modulus G and bulk modulus K of rock— are influenced by the different confining pressures and temperatures. As sandstone is found in the sub-sea basins, it has high porosity and can be a likely storage medium for CCS, it was selected as the type of rock for the triaxial testing. Three different temperatures 15°C, -5°C and -10°C were experimentally examined. The three temperatures represent a different injection scenario of CO2. Confining pressures of 12.5 MPa and 24 MPa were used to represent rock conditions at 500m depth and 1000 m depth under the North Sea, respectively.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Permanent Porosity"

1

Piri, Mohammad. Maximization of permanent trapping of CO{sub 2} and co-contaminants in the highest-porosity formations of the Rock Springs Uplift (Southwest Wyoming): experimentation and multi-scale modeling. Office of Scientific and Technical Information (OSTI), March 2014. http://dx.doi.org/10.2172/1146968.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Permanent Porosity' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography