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Online since: December 2022
Authors: Sadiq S. Muhsun, Najeeb Fadhil Alnsrawy
The purpose of this paper is to develop a CFD simulation of pollutant transport through multi-porous media that considers the effect of hydraulic parameters and porous media properties on the concentration and distribution of pollutants through the media that have not been considered in previous work and research.
It's also used in air pollution management and a variety of chemical engineering procedures [14]. 1.1.2 PRECIPITATION The movement of some heavy metal ions in porous media may be affected by the sedimentation process, where they are deposited in the form of solid materials when interacting with some compounds, especially salts, such as the iron element we use in this study, part of which is deposited when interacting with sulfate salts, and the following Eq.1 shows this [15].
THE RESULTS OF THE KD EXPERIMENT AND THE POLLUTANT TRANSFER EXPERIMENT THROUGH POROUS MEDIA SHOWED THAT THE ADSORPTION PROCESS IS NOT THE ONLY EFFECT TO GET RID OF THE POLLUTANT, AS THE SEDIMENTATION FACTOR DUE TO SALTS SHOWED A BIG ROLE.
THE KD FACTOR PLAYS THE LARGEST ROLE IN THE PROCESS OF GETTING RID OF THE POLLUTANT, WHILE THE ROLE OF THE POROUS VELOCITY HAS BECOME LESS DUE TO THE OVERLAP OF THE SEDIMENTATION PROCESS.
[6] Chrysikopoulos C V, Kitanidis P K and Roberts P V , Analysis of one‐dimensional solute transport through porous media with spatially variable retardation factor.
Online since: January 2016
Authors: A.E. Treml, R.F. Gouvêa, R.C.M. Sales, M.V. Donadon, José Divo Bressan
The material properties are presented in Table 1.
Each layer was modeled using the 3-D linear orthotropic constitutive model available in ABAQUS with mechanical properties listed in Table 1.
This occurs due to the increase in the crack size and especially by modifying the elastic properties of the epoxy matrix.
This is because it did not include the modifications in the material properties in the model.
It’s occurs because the values of the physical and elastic properties of the numerical model do not suffer hygrothermal changes.
Online since: November 2011
Authors: Jun Wang, Dan Zhang, Li Zeng
It has the features of high mechanical integration, electrical motor construction materials and higher efficiency of drive system components.
In the mechanical system with Multi-Degree-of-Freedom movement, a Multi-Degree-of-Freedom motor can replace two or more Single-Degree of Freedom motor, which greatly simplifies the structure of mechanical systems, reduces size and weight, and eliminates the disadvantages such as free play and friction the gear drive brought etc.
In the Multi-Degree-of-Freedom device used for driving high-speed and super speed, there are mechanical (bearing) supporting wear problems.
The function of bearing significantly affects the reliability of the motor and the utilization ratio of equipment.
Collected Papers of Japanese Mechanical Society(C Edition), 63.612, (1997-8), p: 2707—2713
Online since: November 2015
Authors: Roman Jaskulski, Piotr Wiliński
Another part of analysis was assessment of factors affecting level of safety margin and their participation in assuring the margin.
For the compressive strength these factors were 4% and 16% accordingly and for the tensile strength they were 6% and 19% accordingly.
The last factor analyzed for the purpose of this study was the impact of the variation of individual parameters included in models of shear resistance on the coefficient of variation the resultant distributions obtained from simulation.
Koper: Determination of basic mechanical properties of modern construction concrete, (in Polish), PhD thesis, Warsaw University of Technology, Płock, 1999
Online since: March 2019
Authors: Ramlan Aziz, Mailina Jamil, Ida Idayu Muhamad, Sulaiman Ngadiran, Harisun Yaakob, Nor Farahiyah Aman Nor, Maizatulakmal Yahayu, Nor Rashidah Ahmed
The gaharu only forms in condition of which the area of the tree has been affected by certain disease [2].
The solvent types and polarity indexes are the main influencing factors of gaharu oleoresin and oil extraction [4,5].
The mean diameter of the wood particles was determined by mechanical sieving separator.
Properties of gaharu oleoresin extracted using methanol and ethanol Properties Methanol Ethanol Viscosity [mPas] 8.06 ± 0.010 6.91 ± 0.012 TDS [mg/ml] 2.97 ± 0.058 1.93 ± 0.058 TPC [mg GAE/g sample] 80.17 ± 0.051 77.19 ± 0.036 OC [% w/w] 1.35 ± 0.007 1.23 ± 0.009 Table 2.
Misihairabgwi, Phytochemical and antioxidant properties of different solvent extracts of Kirkia wilmsii tubers, Asia Pac.
Online since: September 2011
Authors: Run Bo Bai, Hai Hong Xu, Xin Xin Zhang
Because of the vanishing moment property of the wavelet (with sufficiently large n such that n≥α), the CWT focuses only on a singular part of a function.
This is because the curvature of the mode shape at different locations affects the local singularity behavior as the analysis is carried out in a finite-dimensional space of (u, s).
Fig. 4 The estimates of the Holder exponent for different values of m with n=0.25 (L=1.2m, b=0.02m, h=0.02m, E=70GPa, ρ=2700kg/m3, clamped-clamped beam) The order of the mode is another factor we address in this work.
Kutz (Ed.), Mechanical Engineers Handbook, Wiley, New York, (1998) [3] Maosen Cao, Pizhong Qiao: Smart Mater.
Sohn: Mechanical Systems and Signal Processing, vol.17 (2003), p 1163 [9] Z.K.
Online since: June 2007
Authors: P.K. Seo, C.G. Kang, J.W. Bae
Bae 2,c 1 School of Mechanical Engineering, Pusan National University, Busan 609-735, Korea 2 Graduate School of Mechanical and Precision Engineering, Pusan National University, Busan 609-735, Korea a cgkang@pusan.ac.kr, bpkseo92@empal.com, cjwbae@pusan.ac.kr Keywords: Rheology material, Solid fraction, Two-phase flow, Rheology die casting, Rheology compression test Abstract.
The most important factor in the high fraction range is the relationship formulation between the stress and the strain considering the grain size and the deformation of the solid particles with the globular microstructure [3, 4].
Because the flow stress formulation of rheology materials is affected by the solid fraction, the strain, the strain rate and the temperature, etc., it should be represented as a function of their parameters.
The assumption to discretize the governing equation is as follows, the flow model is two-dimensional and the thermo mechanical properties of rheology material with incompressible laminar flow, except for the viscosity, are constant
Online since: December 2016
Authors: Hai Yan Yu, Chen Xiao Zhou
International Journal of Mechanical Sciences, 2010, 52(7): 804-818. ].
Springback can introduce some dimensional errors to the stamped part, which can affect the precision and quality of the subsequent assembly.
International Journal of Mechanical Sciences, 2013, 77: 57-64
International Journal of Mechanical Sciences, 2003, 45(11): 1687-1702. ].
Validation and Application of the Elastic Modulus Model Material Property.
Online since: March 2014
Authors: Hans-Jürgen Christ, Anton Kolyshkin, Martin Cremer, Martina Zimmermann, Christian Stoecker
A summary of the mechanical properties of the material in the pa and the oa condition is given in Table 1.
Table 1: Mechanical properties of the alloys tested.
However, latest investigations on the importance of grain morphology on VHCF behavior of Nimonic 80A proved that the aforementioned mechanisms are affected by the misorientation between neighboring grains.
It is assumed that only in grains with highest misorientation factor (not presented here due to limited manuscript size) the local stress peaks caused by dislocation pile-ups will result in failure-relevant crack formation. 20 µm While damage formation during fatigue loading in the LCF and to a certain degree in the HCF regime for the group of precipitation hardening alloys seems to follow similar mechanisms, this cannot be confirmed for the VHCF regime as the results for the aluminium alloy EN AW-6082 will show.
Online since: April 2021
Authors: Sergiy V. Divinski, Alexander V. Pokoev, Julia V. Osinskaya, François Jomard, Cécilie Duhamel, Aloke Paul, Daniel Gärtner, Vladimir A. Esin, Lisa Belkacemi, Andrey A. Fedotov, Juliana Schell
A special attention will be paid to the application of the SIMS profiling to fine grained materials with potentially a strong heterogeneity of the local kinetic properties.
Furthermore, each sectioning method has its benefits depending on materials properties.
Thus, depending on the material properties, fine sections with a thickness down to about 0.3 µm up to comparable rough sections with a thicknessof several tens of microns can be produced.
These alloys are exemplary for the mechanical sectioning method due to the materials properties [53, 54, 55, 56, 57].
The accuracy of the XRD determination of the diffusion coefficient is determined by several factors: 1.
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