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Correlation between porosity, conductivity and permeability of sedimentary rocks — a ballistic deposition model
Dasgupta, Ruma; Roy, Shashwati; Tarafdar, S - In: Physica A: Statistical Mechanics and its Applications 275 (2000) 1, pp. 22-32
channels into account. The results are used to calculate the permeability (K) from an equivalent channel model. Variation of σ … and K with porosity are compared with geological field data. The agreement is quite satisfactory. …
Persistent link: https://www.econbiz.de/10011057284
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Review of convection heat transfer and fluid flow in porous media with nanofluid
Mahdi, Raed Abed; Mohammed, H.A.; Munisamy, K.M.; … - In: Renewable and Sustainable Energy Reviews 41 (2015) C, pp. 715-734
together: porous media and nanofluids. This article aims to summarize the published articles in respect to porosity …, permeability (K) and inertia coefficient (Cf) and effective thermal conductivity (keff) for porous media, also on the …
Persistent link: https://www.econbiz.de/10011077273
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Fissured employment and network bargaining : emerging employment relations dynamics in a contingent world of work
Anner, Mark Sebastian; Fischer-Daly, Matthew M.; … - In: ILR review : a publication of the New York State School … 74 (2021) 3, pp. 689-714
Persistent link: https://www.econbiz.de/10012521555
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Fazy mineralne w triasowych skałach węglanowych rejonu Chorzowa
Katarzyna, Stanienda; Jacek, Nowak; Tomasz, Kukiełka - In: Gospodarka Surowcami Mineralnymi / Mineral Resources … 28 (2012) 3, pp. 71-91
This article presents the results of research on carbonate rock samples taken from Triassic sediments of the northern area of Chorzów City. The aim of the research was to identify themineral phases of these rocks, especially carbonate phases.
Persistent link: https://www.econbiz.de/10011008910
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STRUCTURAL AND OPTICAL PROPERTIES OF n-TYPE POROUS SILICON: EFFECT OF LIGHT ILLUMINATION
JEYAKUMARAN, N.; NATARAJAN, B.; PRITHIVIKUMARAN, N.; … - In: Surface Review and Letters (SRL) 15 (2008) 06, pp. 897-901
Porous silicon (PS) layers have been prepared from n-type silicon wafers of (100) orientation. SEM, FTIR, and PL have been used to characterize the morphological and optical properties of PS. The influence of varying light illumination in the anodizing solution, on structural and optical...
Persistent link: https://www.econbiz.de/10004971860
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Determination of adequate regenerator for a Gamma-type Stirling engine
Gheith, Ramla; Aloui, Fethi; Ben Nasrallah, Sassi - In: Applied Energy 139 (2015) C, pp. 272-280
stainless steel with different porosities were manufactured and experimented (95%, 90%, 85%, 80% and 75%). Porosity that gives … drops, was retained. Thus, the regenerator in stainless steel with porosity of 85% was considered as the most suitable …
Persistent link: https://www.econbiz.de/10011116043
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Three dimensional numerical investigations for the effects of gas diffusion layer on PEM fuel cell performance
Inamuddin; Cheema, Taqi Ahmad; Zaidi, S.M.J.; Rahman, S.U. - In: Renewable Energy 36 (2011) 2, pp. 529-535
of the GDL. The performance of PEM fuel cell varies with different porosity and thickness of the GDL. Hence, a three … dimensional model is simulated to find out the effects of porosity and thickness of GDL on PEMFC performance using a commercial … code CFD-ACE+. It was observed that high porosity gave high current density by allowing more reactants to reach the …
Persistent link: https://www.econbiz.de/10010806233
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Thermal and thermohydraulic performance evaluation of a novel type double pass packed bed solar air heater under external recycle using an analytical and RSM (response surface methodology) combined approach
Singh, Satyender; Dhiman, Prashant - In: Energy 72 (2014) C, pp. 344-359
) glass covers for a fixed 95% porosity of the packed material on its thermal and thermohydraulic performances. The analytical …
Persistent link: https://www.econbiz.de/10010809784
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Boundaries and Conflict in the Mano River Region of West Africa
Silberfein, Marilyn; Conteh, Al-Hassan - In: Conflict Management and Peace Science 23 (2006) 4, pp. 343-361
The porous and contestable features of African boundaries are two interacting themes that are closely linked to the emergence and spread of conflict in Africa in the last decade. This study uses the Mano River Region—Sierra Leone, Guinea, Liberia, and Ivory Coast—to illustrate how...
Persistent link: https://www.econbiz.de/10010770236
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Combustion characteristics and thermal efficiency for premixed porous-media types of burners
Yu, Byeonghun; Kum, Sung-Min; Lee, Chang-Eon; Lee, Seungro - In: Energy 53 (2013) C, pp. 343-350
the SF burner had the lowest NOx emissions and thermal efficiency. In other words, the smaller the burner porosity was … (porosity: SF < CM < MF), the higher the CO emission was and the lower the thermal efficiency was. Based on the thermal …
Persistent link: https://www.econbiz.de/10011053402