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Online since: June 2016
Authors: I Ketut Okariawan, Emmy Dyah Sulistyowati, Mirmanto Mirmanto
Effect of Mass Flow Rate on Dryer Room Radiator Pressure Drop and Heat Transfer
Mirmantoa, Emmy Dyah Sulistyowatib, I Ketut Okariawanc
Mechanical Engineering Department, Mataram University, Jl.
To validate the pressure transducer, flow friction factor, f, is examined using equation below
The laminar friction factor data can be predicted using laminar friction factor theory (Darcy friction factor) with a MAE of 0.068 or (6.8%), while in turbulent flows, the experimental friction factor data compared with the Blasius correlation results in a MAE of 0.048 or (4.8%).
This is a consequence of water property dependence or effect of fluid properties on the pressure drop, see Fig. 3b.
The decrease/increase ΔT affects the heat transfer rate to decrease/increase.
To validate the pressure transducer, flow friction factor, f, is examined using equation below
The laminar friction factor data can be predicted using laminar friction factor theory (Darcy friction factor) with a MAE of 0.068 or (6.8%), while in turbulent flows, the experimental friction factor data compared with the Blasius correlation results in a MAE of 0.048 or (4.8%).
This is a consequence of water property dependence or effect of fluid properties on the pressure drop, see Fig. 3b.
The decrease/increase ΔT affects the heat transfer rate to decrease/increase.
Online since: July 2013
Authors: Andrew Bradshaw, Yu Lung Chiu, Ian Jones, Yu Lu
As zinc (Zn) and calcium (Ca) are non-toxic and recognized as nutritionally essential elements in the human body, in this study Zn and Ca were selected as alloying elements to produce suitable bio-corrosion properties.
The effects of microstructure on the corrosion properties have been discussed previously, e.g., the influence of Mg17Al12 (β) in AZ91 [10,11].
The heat treatment affects greatly on the micro-galvanic corrosion between the anodic Mg matrix and cathodic second phases.
Chen, Microstructure, mechanical properties and bio-corrosion properties of Mg-Si(-Ca, Zn) alloy for biomedical application, Acta Biomaterialia 6 (2010) 1756-1762
Manuel, Investigation of the mechanical and degradation properties of Mg-Sr and Mg-Zn-Sr alloys for use as potential biodegradable implant materials, J.
The effects of microstructure on the corrosion properties have been discussed previously, e.g., the influence of Mg17Al12 (β) in AZ91 [10,11].
The heat treatment affects greatly on the micro-galvanic corrosion between the anodic Mg matrix and cathodic second phases.
Chen, Microstructure, mechanical properties and bio-corrosion properties of Mg-Si(-Ca, Zn) alloy for biomedical application, Acta Biomaterialia 6 (2010) 1756-1762
Manuel, Investigation of the mechanical and degradation properties of Mg-Sr and Mg-Zn-Sr alloys for use as potential biodegradable implant materials, J.
Online since: October 2014
Authors: Yu Tian, Jing Wang, Yang Liu
(1.2)
In this formula, A and B are the correction factors, Cair and nair are parameters of fatigue crack growth rate in dry air.
In order to obtain more accurate parameters, the factors in the fitting process should be in the same order of magnitude.
In this study, formula (1.4) is amended as follows: (1.6) The factors in formula (1.6) can be achieved by MATLAB : a1=1.8299;a2=0.0341;a3=-3.8563;a4=0.0007;a5=-0.3279;a6=3.948.
The dimensions of the CT specimen are shown in Figure 1: the material model is linear elastic material, and the mechanical properties are: elastic modulus E = 210GPa, Poisson's ratio υ = 0.3. 2.1.2 Model Meshing The quantities of sections are set on each edge, and the grids are divided.
In this paper, the influence of environmental concentrations, stress ratio, loading frequency and other factors on the crack growth rate are introduced by the computational model.
In order to obtain more accurate parameters, the factors in the fitting process should be in the same order of magnitude.
In this study, formula (1.4) is amended as follows: (1.6) The factors in formula (1.6) can be achieved by MATLAB : a1=1.8299;a2=0.0341;a3=-3.8563;a4=0.0007;a5=-0.3279;a6=3.948.
The dimensions of the CT specimen are shown in Figure 1: the material model is linear elastic material, and the mechanical properties are: elastic modulus E = 210GPa, Poisson's ratio υ = 0.3. 2.1.2 Model Meshing The quantities of sections are set on each edge, and the grids are divided.
In this paper, the influence of environmental concentrations, stress ratio, loading frequency and other factors on the crack growth rate are introduced by the computational model.
Online since: October 2010
Authors: Teng Yun Zhang, You Yuan Shao, Jian Chen, Hong Bo Fan
However, inorganic ceramic membranes do not possess electrically conductive and catalytic properties.
Then the tubular ceramic membrane electrode was obtained with the properties of electrocatalysis and membrane porosity.
The carbon deposition also affects the electroconductivity of the tubular membrane electrode.
The influencing factors can be summarized as the pyrolyzing catalyst content, the propylene flowrate, the pyrolyzing temperature and time.
To investigate the membrane property further, the same electrode was also used for testing according to Fig.3.
Then the tubular ceramic membrane electrode was obtained with the properties of electrocatalysis and membrane porosity.
The carbon deposition also affects the electroconductivity of the tubular membrane electrode.
The influencing factors can be summarized as the pyrolyzing catalyst content, the propylene flowrate, the pyrolyzing temperature and time.
To investigate the membrane property further, the same electrode was also used for testing according to Fig.3.
Online since: November 2025
Authors: Haia H. Aldosari
The unique physical properties of biocompatible nanosized zinc oxide (ZnO) have led to important scientific achievements.
Along with their remarkable healing properties, ZnO NPs are also known to produce ROS and induce apoptosis.
Schematic illustration of toxicity mechanism/factors of ZnO NPs. 6.Future Perspectives ZnO NPs therapy applications are one of the multifunctional nanoplatforms that are the key to the future of nanomedicine.
Furthermore, one of the main contributing factors to ZnO NPs' toxicity is the production of ROS.
Lu, Zinc oxide nanostructures: synthesis and properties, Journal of nanoscience and nanotechnology. 5(2005) 1561-1573
Along with their remarkable healing properties, ZnO NPs are also known to produce ROS and induce apoptosis.
Schematic illustration of toxicity mechanism/factors of ZnO NPs. 6.Future Perspectives ZnO NPs therapy applications are one of the multifunctional nanoplatforms that are the key to the future of nanomedicine.
Furthermore, one of the main contributing factors to ZnO NPs' toxicity is the production of ROS.
Lu, Zinc oxide nanostructures: synthesis and properties, Journal of nanoscience and nanotechnology. 5(2005) 1561-1573
Online since: December 2011
Authors: Dong Sheng Zhang, Wei Zhang, Xu Feng Wang, Ting Feng Cui, Jin Liang Wang
The dip angle of coal seam is 0~3°, with hardness factor f=2.5, and density is 1.28 t/m3.
The method of full-seam mining is adopted in working face, and all caving method is applied for roof controlling. 1—1103 working face; 2—entry protection coal-pillar; 3—headentry of 1103 working face; 4—tailentry of 1105 working face; 5—crossheading Fig.1 Roadway layout in the coal face Theoretical Calculation The design of rational entry protection coal-pillar is a relative complex question, it is affected by many factors such as mining depth, thickness of coal seam, height of entry, mechanical property of coal and rock, and so on [2-4], there is yet not a perfect theory and method on design which can adapt to the different conditions at home and abroad.
Applying the limit equilibrium theory of rock, the width of plastic area caused by gob(x0) is as follow [9]: (6) Where, K—factor of stress concentration, adopting 3.5; P—resistance on coal rib by support, adopting 0.1 MPa; C—cohesion of coal, adopting 1.2 MPa; φ—internal friction angle of coal, adopting 25°; f—friction factor of contact between coal seam and roof or floor, adopting 0.25; ξ—triaxial stress coefficient, .
Similarly, applying the limit equilibrium theory, the width of plastic area caused by entry(x1) is shown as follow [10]: (7) Where, α, k—generalized Mises standard factor, ,.
Conclusions The stability of entry protection coal-pillar in large mining height panel accounts for the support effects of the entry directly, and hence affects the coal mining safety.
The method of full-seam mining is adopted in working face, and all caving method is applied for roof controlling. 1—1103 working face; 2—entry protection coal-pillar; 3—headentry of 1103 working face; 4—tailentry of 1105 working face; 5—crossheading Fig.1 Roadway layout in the coal face Theoretical Calculation The design of rational entry protection coal-pillar is a relative complex question, it is affected by many factors such as mining depth, thickness of coal seam, height of entry, mechanical property of coal and rock, and so on [2-4], there is yet not a perfect theory and method on design which can adapt to the different conditions at home and abroad.
Applying the limit equilibrium theory of rock, the width of plastic area caused by gob(x0) is as follow [9]: (6) Where, K—factor of stress concentration, adopting 3.5; P—resistance on coal rib by support, adopting 0.1 MPa; C—cohesion of coal, adopting 1.2 MPa; φ—internal friction angle of coal, adopting 25°; f—friction factor of contact between coal seam and roof or floor, adopting 0.25; ξ—triaxial stress coefficient, .
Similarly, applying the limit equilibrium theory, the width of plastic area caused by entry(x1) is shown as follow [10]: (7) Where, α, k—generalized Mises standard factor, ,.
Conclusions The stability of entry protection coal-pillar in large mining height panel accounts for the support effects of the entry directly, and hence affects the coal mining safety.
Online since: August 2013
Authors: Thawatchai Plookphol, Sirikul Wisutmethangoon, Lek Sikong, Suchart Chantaramanee
Mixing SAC305 with SWCNTs can improve mechanical properties of the alloy composite [3,5].
Wu, study on electronic properties of single-wall carbon nanotubes, Mater.
Tay, Study on the microstructure and mechanical properties of a navel SWCNT-reinforced solder alloy for ultra-fine pitch applications, Thin Solid Films. 504 (2006) 371-378
Zha, Mechanical properties of nickel-coated single-walled carbon nanotubes and their embedded gold matrix composites, Phys.
Hong, Electrical and mechanical properties of carbon nanotube reinforced copper nanocomposites fabricated by electroless deposition process, Mater.
Wu, study on electronic properties of single-wall carbon nanotubes, Mater.
Tay, Study on the microstructure and mechanical properties of a navel SWCNT-reinforced solder alloy for ultra-fine pitch applications, Thin Solid Films. 504 (2006) 371-378
Zha, Mechanical properties of nickel-coated single-walled carbon nanotubes and their embedded gold matrix composites, Phys.
Hong, Electrical and mechanical properties of carbon nanotube reinforced copper nanocomposites fabricated by electroless deposition process, Mater.
Online since: November 2011
Authors: Da Peng Fan, Shi Xun Fan, Ryozo Nagamune
The proposed method is general enough to be applicable to typical mechanical motion control systems that possess flexible joints and variable loads.
Due to usually has extremely large value distributing in very high frequency range, the affect of term on the dynamics is omitted.
and usually have extremely small values whose variation is not principle factor.
NLS optimization is employed for original parameter set identification due to its good asymptotic properties [6].
Dong: Chinese Journal of Mechanical Engineering Vol.46 (2010), p.135
Due to usually has extremely large value distributing in very high frequency range, the affect of term on the dynamics is omitted.
and usually have extremely small values whose variation is not principle factor.
NLS optimization is employed for original parameter set identification due to its good asymptotic properties [6].
Dong: Chinese Journal of Mechanical Engineering Vol.46 (2010), p.135
Online since: October 2024
Authors: Alwiyah Nurhayati, Kasarapu Venkataramana, C. Vishnuvardhan Reddy
Sr-doped CaMnO3 materials have wide applications due to their thermal and electrical properties.
These efforts give significant effects on the properties of perovskite CaMnO3 based materials such as their thermal, electrical, and structural properties [1–27].
Longo, “Effect of pressure on the magnetic properties of Ca1-xSr xMnO3,” J.
Krstić, “Nanopowders properties and sintering of CaMnO3 solid solutions,” J.
Noudem, “Texture, mechanical and thermoelectric properties of Ca3Co4O9 ceramics,” J.
These efforts give significant effects on the properties of perovskite CaMnO3 based materials such as their thermal, electrical, and structural properties [1–27].
Longo, “Effect of pressure on the magnetic properties of Ca1-xSr xMnO3,” J.
Krstić, “Nanopowders properties and sintering of CaMnO3 solid solutions,” J.
Noudem, “Texture, mechanical and thermoelectric properties of Ca3Co4O9 ceramics,” J.
Online since: February 2022
Authors: Mathias Liewald, Nadezda Missal, Hendrik Venzlaff, Tahsin Deliktas
In order to reduce the component mass and at the same time improve/maintain the structural-mechanical properties of the component, a helix-shaped fin will be formed on the inside of the piston pin.
This paper presents the force measurements of all forming tests whereby the pressed part properties are depicted representatively for the strain 0.375 at two different helix angles (35°, 50°) and under various tribological conditions.
The adaptation factor in QForm® affects the meshing of the simulation objects.
Here the adaptation factor of the workpiece was set to 1.2 and that of the tools to 1.0.
· The surface pretreatment influences the pressed part properties differently depending on the used lubricant, but only marginally.
This paper presents the force measurements of all forming tests whereby the pressed part properties are depicted representatively for the strain 0.375 at two different helix angles (35°, 50°) and under various tribological conditions.
The adaptation factor in QForm® affects the meshing of the simulation objects.
Here the adaptation factor of the workpiece was set to 1.2 and that of the tools to 1.0.
· The surface pretreatment influences the pressed part properties differently depending on the used lubricant, but only marginally.