Title: On the Hydrodynamics Turbulent Control of Mass Transfer in Electrodeposition Process | ||
Author(s): Harinaldi | ||
Pages: 1-7 | Paper ID: 113301-5656 IJMME-IJENS | Published: February, 2011 |
Abstract: A wall-slit jet serves as a mean of hydrodynamics
control for turbulence of an electrolyte flow in a backstep
channel equipped with electrochemical cells to improve mass
transfer of an electrodeposition process. Experimental and
computational works were done to elucidate the effect of flow
parameters to the rate of mass transfer between cell electrodes.
The solution of CuSO4
of 0.5 M was used as electrolyte fluid. The
rate of mass transfer was determined by measuring the local
limiting current at mini cathodes placed in the electrochemical
cell. Some results showed that the wall-slit jet altered the flow
structure and turbulence intensity. The reattachment point
shifted to upstream position, the recirculation zone reduced in
size meanwhile the turbulence intensity increased. These flow
characteristics altered the rate of convective ionic mass transfer.
Within the range of Reynolds number 1500 < Re < 4800 and
velocity ratio of 0.7 < Vr
< 2.6 it is found the mass transfer
relation can be presented a non-dimensional equation of Sh =
0.033Re
0.598
Sc
0.33
, where Sh is the Sherwood number and Sc is the
Schmidt number of the flow.
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Keywords: Turbulence control, wall-slit jet, backward facing step, convective mass transfer, electrodeposition process. | ||
Full Text (.pdf) | 734 KB |
Title: Design, Simulation and Experimental of the Very Low Head Turbine with Minimum Pressure and Free Vortex Criterions | ||
Author(s): Priyono Sutikno, Ibrahim Khalil Adam | ||
Pages: 9-16 | Paper ID: 113701-2828 IJMME-IJENS | Published: February, 2011 |
Abstract: This research was carried out in order to develop a hydro
turbine to be used for specific site of lower Head as run of river,
which has head less than 1.2 meters. The new development of Very
Low Head Turbine has been done in this research use the simple civil
construction and resulting the economically viable. The recent
development of computer-based tools with more efficient algorithms
has allowed a substantial improvement in hydraulic turbine design. The
definition of an initial geometry capable to assist certain characteristics
of turbine performance is a first step for useful numerical turbine
analysis. This paper presents an application of the minimum pressure
coefficient and free vortex criterions for axial-flow hydraulic turbines
cascade geometry design. The criterion was tested for VLH turbine
and it was showed that it is suitable to define the initial geometry for
machine design. The grid of the simulation domain was generated with
GAMBIT grid software package and the results were obtained using
the commercial package Navier Stokes 3-D FLUENT flow to analyze
the fluid flow through blade runner. Using this procedure, a study was
carried out on a small axial-flow turbine, specifically designed to operate
in a Very Low Head. Finally, the results are evaluated to hydraulic
efficiency prediction of blade runner turbines. The result of
simulation has efficiency of 90% and produced the power of 2071
Watt at rotational speed 180 rpm and torque is 219.79 N-m, at the
flow rate of 293.15 l/s.
The prototype of turbine system was tested in Laboratory by using
small channel system that we made it inside the laboratory. The
tested result was obtained maximum efficiency of 90% and the
power output simulation and experimental has the differential less
than 5% at 200 rpm.
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Keywords: Very Low Head Turbine, Minimum Pressure Coefficient Criterion, Free Vortex Design, Numerical Simulation, and Experimental. | ||
Full Text (.pdf) | 652 KB |
Title: Design and Blade Optimization of Contra Rotation Double Rotor Wind Turbine | ||
Author(s): Priyono Sutikno, Deny Bayu Saepudin | ||
Pages: 17-26 | Paper ID: 115301-7474 IJMME-IJENS | Published: February, 2011 |
Abstract: The Intelligent Wind turbine (IWT) has two stages
blades contra rotation. This kind of wind turbine has
characteristic self regulated on the speed due to the
difference torque between two stages horizontal axis wind
turbine, than no need the pitch controller to control the
speed and cut off the wind turbine due to the high wind
speed.
The research of IWT is designed first by optimize several
important design parameters, as a blade section profile and
the multiplier factor of the angle of attack. The design
parameter results are the NACA 6412 is selected as the
optimum blade section profile and the optimum value of
angle of attack multiplier factor is 0.5. The designed IWT
has 3 blades for each front and rear rotor. The research
intelligent wind turbine has 600 mm front diameter and 600
mm rear blade diameter. The characteristics of IWT were
simulated by using Computational Fluid Dynamic (CFD)
software, demonstrated the non entrainment of the contra
rotation, each blades should have the same produced torque.
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Keywords: Intelligent Wind Turbine, Numerical Simulation, Contra rotation Wind Turbine. | ||
Full Text (.pdf) | 1,229 KB |
Title: Peristaltic transport of micropolar fluid in a tubes under influence of rotation | ||
Author(s): A. M. Abd-Alla, G. A. Yahya, H. S. Al :Osaimi | ||
Pages: 27-36 | Paper ID: 101806-1101-7171 IJMME-IJENS | Published: February, 2011 |
Abstract: In this paper, The peristaltic flow of micropolar fluid in a flexible tube with viscoelastic is
studied under effect of rotation. The Runge-Kutta method is developed to solve the governing
equations of motion resulting from a perturbation technique for small values of amplitude ratio. The
time mean axial velocity profiles are presented for the case of free pumping and analyzed to observe
the influence of rotation for various values of Reynolds number, wave number and radial of cylinder.
The results indicate that the effect of rotation is very pronounced. The obtained results are also
compared with those available in the literature in case of waves in cylindrical tubes in the absence of
rotation. Numerical results are given and illustrated graphically.
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Keywords: Peristaltic motion, Micropolar fluid, Perturbation technique, Velocity profiles, Rotation. | ||
Full Text (.pdf) | 819 KB |
Title: A human centered control strategy for a driving simulator | ||
Author(s): A. Capustiac, B. Hesse, D. Schramm, D. Banabic | ||
Pages: 37-44 | Paper ID: 1110001-8989 IJMME-IJENS | Published: February, 2011 |
Abstract: Driving simulators are used in the automotive
industry to prove new systems and evaluate the driver’s
behaviour and interaction with the vehicle. The DRIVASSIST
simulators combine haptic, visual and acoustic cues in order to
immerse the driver into a sufficient degree of realism. The goal of
this paper is to present aspects concerning the simulation and
validation of a control strategy for a motion driving simulator
which includes the dynamical models of the human vestibular
system. It is proved that by introducing the motion perception of
the driver, the workspace required for actuating the driving
simulator is reduced.
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Keywords: Driving simulators, vestibular system, real time simulations, control. | ||
Full Text (.pdf) | 681 KB |
Title: The Effect of Sliding Speed and Normal Load on Friction and Wear Property of Aluminum | ||
Author(s): M. A. Chowdhury, M. K. Khalil, D. M. Nuruzzaman, M. L. Rahaman | ||
Pages: 45-49 | Paper ID: 111701-6868 IJMME-IJENS | Published: February, 2011 |
Abstract: The present paper investigates experimentally the
effect of sliding speed and normal load on friction and wear
property of an aluminum disc sliding against stainless steel pin.
To do so, a pin-on-disc apparatus was designed and fabricated.
Experiments were carried out under normal load 10-20 N, speed
500-2500 rpm and relative humidity 70%. Results show that the
friction coefficient decreases with the increase of sliding speed
and normal load for aluminum. Itis also found that the wear
rates increase with the increase of sliding speed and normal load.
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Keywords: Friction Coefficient,Normal Load, Sliding Speed, Wear Rate. | ||
Full Text (.pdf) | 266 KB |