Results 271 to 280 of about 3,600,739 (309)

Effect of water breakthrough on the dimensionless variables of hydraulically fractured wells

2010 International Conference on Science and Social Research (CSSR 2010), 2010
The major contribution of this work is a provision of available tool to study the dimensionless variables for hydraulically fractured wells producing from a reservoir of inverted nine spot pattern. A simplified approach was used to calculate the dimensionless variables.
null Elham Mohammed Mohammed Khair, null Zhang Shicheng   +1 more
openaire   +1 more source

A single dimensionless variable for solar chimney power plant modeling

Solar Energy, 2009
The solar chimney power plant is a relatively new technology for generating electricity from solar energy. In this paper dimensional analysis is used together with engineering intuition to combine eight primitive variables into only one dimensionless variable that establishes a dynamic similarity between a prototype and its scaled models.
Atit Koonsrisuk, Tawit Chitsomboon
openaire   +1 more source

Opportunities for variable rotor lead in screw compressors depending on dimensionless numbers

Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 2018
The paper deals with the optimisation of the geometry of screw machines, focussing on the wrap angle of the rotors. The Pi-theorem is used to identify independent thermodynamic and geometric factors for the optimisation of dry running twin screw compressors with uniform and dual lead rotors.
Matthias Utri, Andreas Brümmer
openaire   +1 more source

A Polynomial Approach to the van Everdingen-Hurst Dimensionless Variables for Water Encroachment

SPE Reservoir Engineering, 1988
Summary Traditional water-influx calculations rely on accurate values of the van Everdingen and Hurst dimensionless variables pD and qD. We have presented six sets of simple polynomials that provide a fast, simple method to determine pD, pD’, and qD for finite or infinite radial aquifers.
M. A. Klins, A. J. Bouchard, C. L. Cable
openaire   +1 more source

Surveillance Using Dimensionless Variables in the Mature Oil Field La Cira Infantas

SPE Improved Oil Recovery Conference, 2018
Abstract La Cira Infantas is the oldest oil field in Colombia. It has approximately 100 years of production, and it is located in the Middle Magdalena Valley Basin, producing from a black oil multilayered and heterogeneous sandstone reservoir. Primary production began in 1918 until 1959 when the first water flooding process began.
Victor Alfonso Morales, Leyla Kristle Ramirez   +1 more
openaire   +1 more source

Design of electrodialysis desalination plants by considering dimensionless groups and variable equivalent conductivity

Desalination, 2018
Abstract Electrodialysis desalination plants, for brackish water, are designed based on different parameters such as feed concentration, current density, and stack construction. Among the various model assumptions, the constancy of the equivalent conductivity of the diluate and concentrate streams is considered a prominent one.
Bilal Ahmed Qureshi, Syed M. Zubair
openaire   +1 more source

Steady Flows of a Fluid Oscillating in an Axisymmetric Channel of Variable Cross-Section, Versus the Dimensionless Frequency

Microgravity Science and Technology, 2020
The averaged flows excited by oscillations of fluid in an axisymmetric channel, which transverse section periodically changes with longitudinal coordinate, are experimentally studied. Oscillations are caused by harmonious change of a volume of the fluid, which is pumped over via the channel.
Olga Vlasova, Ivan Karpunin, Dmitriy Latyshev, Victor Kozlov   +3 more
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Dimensionless Analysis of Process Variables in Air-Sparged Hydrocyclone ( ASH ) Flotation of Fine Coal

Coal Preparation, 1991
Abstract Fine coal cleaning by froth flotation in a 2-inch air-sparged hydrocyclone (ASH) has been investigated and the effects of important design and operating variables on separation efficiency examined. In order to reduce the complexity of the analysis, the flotation performance of the air-sparged hydrocyclone was studied by dimensionless analysis.
S. GOPALAKRISHNAN, Y. YE, J. D. MILLER
openaire   +1 more source

An examination of dimensionless variables in sediment threshold studies

Geo-Marine Letters, 2022
Aamer Majid Bhat, Manzoor Ahmad Ahanger, Pranab Kumar Mohapatra   +2 more
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Dimensionless temperatures at the wall of an infinitely long, variable-rate, cylindrical heat source

Geothermics, 2007
In geothermal applications the thermal conductivity of rocks is needed, for example, to determine terrestrial heat flow, to evaluate heat losses to the surrounding formations in wells and to design borehole heat exchangers. Cylindrical probes (heaters) with a constant heat flow rate are used in boreholes or in the laboratory to obtain the thermal ...
openaire   +1 more source