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Online since: May 2011
Authors: Xiong Hu Zhao, Yu Fei Li, Wai Li, Fei Gao
As a result, the effect of drilling fluids environment on rock properties can be displayed visually, which is supposed to be significant in terms of rising ROP theoretically and improving drilling fluids properties.
On the whole, the increased rate of ROP is greater than 20%, which demonstrates that the physical and chemical properties of rock surfaces are both influenced by the zeta potential.
It is probably because the other properties of ZJBS have had an influence on ROP.
It maybe because the micelle numerator is oversized affecting the penetration from solutions to rocks.
(2) One of the most important factors that affect ROP is the zeta potential of the rock-solution contact.
Online since: April 2012
Authors: Hong Jing Zhang
Oil producer, mining methods and other factors changing the nature of crude oil emulsions.
There are many factors that affect the stability of crude oil emulsion, such as crude oil density, viscosity, water content, droplet diameter, droplet charged, the nature of the water phase, crude oil solids, viscosity and interfacial film strength and the aging of the emulsion, etc., this large number of factors increase the crude oil emulsion stability study of complexity.
Borve and Sjoblom et al. [9] in the study of copolymers of styrene and allyl alcohol with sixteen or twenty benzene amine alkyl amine to form a mixture of the nature of the monolayer was found: the formation of surface-active substances the mechanical properties of interfacial film is W / O emulsion stability of the key.
These solid particles stabilize emulsions depends on the following factors: particle size, particle interactions and particle wetting properties.
North Sea crude oil surfactant component properties [J].
Online since: January 2012
Authors: Xiao Ping Wen, Wen Ce Sun, Zhi Chao Liu, Ming Ma
Norimasa Iida maintained certain high-speed flame wave propagation characteristics of micro-channel and identified the main factors affecting the propagation [2].
To clarify the principles that narrow channel effects the gas deflagration flame propagation, this paper compares different potential factors, such as various narrow spacing and different initial gas deflagration velocity, which suppress flame propagation based on CFD (Computational Fluid Dynamics) numerical simulation.
In fact, the minimum ignition temperature of gas is also connected closely with gas concentration, pressure, turbulence intensity, and other factors.
Changes of chemical reaction rates can also be used to further explain the quenching properties of the channel.
Iida, “Premixed flame propagating into a narrow channel at a high speed, part 2: Transient behavior of the properties of the flowing gas inside the channel,” Combustion and Flame, vol. 60, 1985, pp. 257-267
Online since: June 2017
Authors: A.S. Yanyushkin, D.V. Lobanov, Vadim Skeeba, Pavel V. Arkhipov
Introduction One of the main aims of modern mechanical engineering is a complex approach to providing high quality and competitiveness of an output which requires a close link between science and the manufacturing environment since absence of simple and safe ways to adjust processing becomes a key factor of labor intensity increase and quality worsening.
Final processing techniques using common abrasive tools in some cases do not allow achieving the required quality and operational characteristics of finished products since the use of productive instrument of superhard abrasive materials is limited due to problems related to restoration of their cutting properties.
Stabilization of the diamond grinding disk cutting properties is achieved by its extra electrochemical dressing.
At the same time, adjusting the electrochemical softening level of the material via changing the intensity of the etching current also affects the energy consumption in the combined electric powered diamond processing.
High performance and quality of hard-alloy materials processing are provided by stabilizing the cutting properties of metal-bonded abrasive tools and partial softening of the processed material.
Online since: May 2018
Authors: Partha S. Mallick, P. Uma Sathyakam
Further, Polyimides (PIs) also have extraordinary properties of high thermal conductivity, high electrical resistivity, chemical inertness and excellent mechanical properties [67].
One of the important factors that determine the reliability of ODA-GO is the polymer interaction that binds the GO and the polymer together in a mat form.
Factors that influence the dielectric constant such as anions, solvents and organic linkers were also studied.
Interaction of the low-k material with CNT sidewalls is a major area of concern as the thermo mechanical properties of the low-k material affect the performance of CNT interconnects.
Parashar, Atomistic modeling of BN nanofillers for mechanical and thermal properties: a review, Nanoscale 8 (2016) 22-49
Online since: December 2009
Authors: Mohammed Hadj Meliani, Abdellah El Azizi, Azedine Belalia, Ali Benamar
Stress concentrations near to contact regions affect all processes occurring in frictional interaction.
High contact pressures and sliding velocities cause heating in the contact zones, and substantial changes in the properties of the surface layer.
In the case of mechanical transfer, several assumptions are made.
For chemical mechanical polishing, stability is reached at 175 cycles.
From expression 34, we could plot table 5 which expresses the variance share attached to each factor and the cumulative variance of the axes relating to the factorial plane projection for high-alloy steels.
Online since: July 2011
Authors: Dag Mortensen, Hallvard Gustav Fjær, Dag Lindholm, Magne Rudshaug, Einar Arne Sørheim
The Surface-to-Surface (S2S) method applies the hemicube ray-tracing method to calculate a set of view factors.
These configuration factors depend only on the geometry, and a re-calculation is required if the geometry is updated during the computation.
The calculated view factors are applied in the equation system for the radiosities.
These type of meshes are also useful to optimize meshes on domains with varying physical properties, and for the user of the modeling tool it is possible to connect meshes with different element types, e.g. an automatically generated tetrahedral mesh with a hexahedral mesh.
Further on a nonparallel version will not be affected by the parallel programming pragmas, and finally OpenMP is supported for shared memory hardware by Intel Fortran compiler OpenMP options.
Online since: July 2023
Authors: Marwa Jamal Mohammed, Sadiq J. Hamandi, Marwan N. Arbilei
Apart from the risk factors mentioned above, the use of the implantation system may cause infections around the implant [9].
Materials used for analyses and their properties are shown in Table 1.
The force affecting the head of the implant was estimated from 2000 N to 4000 N.
Hussein, “Bone mechanical properties in healthy and diseased states,” Annual review of biomedical engineering, vol. 20, pp. 119-143, 2018
Miyashita, “Microstructure and mechanical properties of micro-resistance spot welding between stainless steel 316L and Ti-6Al-4V,” The International Journal of Advanced Manufacturing Technology, vol. 96, no. 5, pp. 2567-2581, 2018
Online since: January 2013
Authors: Ya Ping Mo, De Qing Zhu, Jun Li
Sintering under high temperatures, during sintering, the sintering characteristics of the iron-containing raw material itself is the most important internal factors affect sintering process.Alkalinity, water and fuel are the most important external factors affect the sintering process.To adapt the sintering characteristics of iron materials in order to reach the best sintering effect.
During the sintering process, the addition of fuel, grain size of the fuel,combustion properties of fuel and other factors that directly affect the temperature and heat change of the sintering process.
Table 2 Test Designing Quicklime Dolomite Dolomite Limestone Back to mine Water Alkalinity 2.0 3.5 4 5.9 30 6.2±0.2 1.90±0.05 Test Results Analysis 3.1 composition of fuel particle size and distribution in the mixture The solid fuel used in the test is the anthracite for sintering, fuel involved in the mixing granulation.In the function of mechanical forces, the distribution of the different fractions in the mixture changed,its composition of original particle size and the distribution of various fractions in the mixture shown in Figure 1, Figure 2 respectively.
The results show that: solid fuels in mixed granulation,in the function of mechanical force and water.
References [1] FAN xiao-hui,MENG jun,CHEN xu-ling.The Factors of Calcium Ferrite Formation in Iron Ore Sintering[J].the Journal of Central South University,2008,39(6):1125-1131.
Online since: December 2012
Authors: Gang Xu, Xiao Ming Yi, Song Gen Wang, Zhen Qing Liu
The results show that high permeability coefficient and strong capillary are main factors to increase the water content, and the influence of capillary rising is greater than that of rainfall infiltration.
Water content and compaction both effect the mechanical characteristics of soils, but the influence of water content is more obvious than that of compaction [1,2].
Table 1 presents the Physical properties of the soil.
Table 1 The physical properties of the silt soil grain composition ωL[%] ωP[%] IP=ωL-ωP GS particle[mm] 0.25~0.074 0.074~0.05 0.05~0.005 0.005~0.002 <0.002 33.6 24.8 8.8 2.7 content[%] 26.5 34.2 34.9 4.3 0.1 Compaction tests.
Particles with the diameter less than 0.005mm affect the action force on the interface between water and soil particles, so that the silt sample appears the characteristic of cohesive soil.
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