scholarly journals Experimental Measurements and Numerical Analysis of Al Deoxidation Equilibrium of Molten Fe–Cr–Ni Alloy

2021 ◽  
Vol 61 (9) ◽  
pp. 2331-2339
Author(s):  
Hiroshi Fukaya ◽  
Seika Nakajima ◽  
Jonah Gamutan ◽  
Shigeru Suzuki ◽  
Koji Kajikawa ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Experimental Measurements ◽  
Deoxidation Equilibrium ◽  
Ni Alloy

scholarly journals Frequency multiplexed coherent φ-OTDR

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hannah M. Ogden ◽  
Matthew J. Murray ◽  
Joseph B. Murray ◽  
Clay Kirkendall ◽  
Brandon Redding
Keyword(s):  
Numerical Analysis ◽  
Pulse Train ◽  
State Of The Art ◽  
Average Power ◽  
Comprehensive Analysis ◽  
Experimental Measurements ◽  
Rayleigh Backscattering ◽  
Sensor Performance ◽  
Sensor Platform ◽  
Lower Noise

AbstractWe present a comprehensive analysis of a frequency multiplexed phase-measuring φ-OTDR sensor platform. The system uses a train of frequency-shifted pulses to increase the average power injected into the fiber and provide a diversity of uncorrelated Rayleigh backscattering measurements. Through a combination of simulations, numerical analysis, and experimental measurements, we show that this approach not only enables lower noise and mitigates interference fading, but also improves the sensor linearity. We investigate the sensor dependence on the length of the pulse train and characterize the sensor performance as a function of range, demonstrating operation from 1 to 50 km. Despite its relative simplicity, this platform enables state-of-the-art performance, including low crosstalk, high linearity, and a minimum detectable strain of only 0.6 p$$\varepsilon /\sqrt{\text{Hz}}$$ ε / Hz in a 10 km fiber with 10 m spatial resolution and a bandwidth of 5 kHz.

scholarly journals Aluminum Deoxidation Equilibrium of Fe-Ni Alloy at 1773 K and 1873 K

2018 ◽  
Vol 49 (5) ◽  
pp. 2389-2399
Author(s):  
Hiroshi Fukaya ◽  
Koji Kajikawa ◽  
Annelies Malfliet ◽  
Bart Blanpain ◽  
Muxing Guo
Keyword(s):  
Deoxidation Equilibrium ◽  
Ni Alloy ◽  
Aluminum Deoxidation

scholarly journals Investigation of dynamics and power needs for container unloading from ship process

2021 ◽  
Vol 24 (1) ◽  
pp. 89-99
Author(s):  
Jolanta Janutėnienė ◽  
Marijonas Bogdevičius ◽  
Valdas Jankūnas ◽  
Jūratė Janutėnaitė-Bogdanienė ◽  
Arūnas Andziulis ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Numerical Analysis ◽  
Contact Forces ◽  
Experimental Measurements ◽  
Operational Problem ◽  
Frictional Forces ◽  
Power Needs

The operational problem of container unloading from the ship is analyzed in this paper. Dynamic “crane-cargo-ship” system was investigated, and a mathematical model was created. In the model, the gap between the container and the ship’s cargo hold, the mass of the cargo, the container’s center of the mass, and the frictional forces that may occur during lifting from the cargo hold were estimated. Numerical analysis of the system was performed. Results of numerical analysis were compared with experimental measurements of containers unloading process in port. Requirement of lifting power was modelled depending on mass of cargo. Additional power needs in case of contact forces between container and wall of the ship’s cargo hold were calculated. Rational lifting conditions could be deduced using a created mathematical model and the reliability of the container and cargo during lifting could be deduced.

scholarly journals Experimental, analytical and numerical analysis of voltage distribution along the cap-and-pin insulators

2020 ◽  
Vol 4 (2) ◽  
Author(s):  
Mladen Banjanin
Keyword(s):  
Mathematical Model ◽  
Numerical Analysis ◽  
Electrostatic Field ◽  
Field Model ◽  
Experimental Measurements ◽  
Voltage Distribution ◽  
Specialized Software ◽  
The Earth ◽  
Good Agreement ◽  
Linear Voltage

This paper deals with the experimental, analytical and numerical analysis of voltage distribution along the cap-and-pin insulators. Five different insulators strings are analyzed, consisting of two, three, four, five and six cap-and-pin U40BL glass disc insulators. Experimental measurements are performed in the high voltage laboratory at the Faculty of Electrical Engineering East Sarajevo. Measurement of the voltage distribution along the disc insulators is performed by using measuring sphere gap. Analytical calculations are performed by using mathematical model which considers parasite self-capacitances of disc insulators, as well as their parasite capacitances to the earth and to the phase conductor. Calculations of the parasite capacitances values are performed and optimum values which lead to the minimum difference between measured and calculated results are suggested. Numerical analyses of the non-linear voltage distribution are performed by using electrostatic field model in software Comsol Multyphisics. 2D axisymmetric models of the cap-and-pin insulators are developed. Despite the measuring configuration is not suitable for numerical analysis, relatively good agreement between the measured results and results calculated by using specialized software are achieved.

scholarly journals Aluminum Deoxidation Equilibrium in Liquid Fe-36%Ni Alloy.

2002 ◽  
Vol 42 (7) ◽  
pp. 679-684 ◽  
Author(s):  
Sang-Beom Lee ◽  
Sung-Mo Jung ◽  
Hae-Geon Lee ◽  
Chang-Hee Rhee
Keyword(s):  
Deoxidation Equilibrium ◽  
Ni Alloy ◽  
Aluminum Deoxidation

Calculation of the Pressure Gradient, Velocity, and Wall Shear in Arteries for a Given Flow Rate

2011 ◽  
Vol 2 (2) ◽  
Author(s):  
A. S. Abdalla Wassf Isaac
Keyword(s):  
Fourier Series ◽  
Numerical Analysis ◽  
Pressure Gradient ◽  
Mathematical Models ◽  
Flow Rate ◽  
Input Data ◽  
Inverse Method ◽  
Experimental Measurements ◽  
Artery Flow

The aim of this study was to build an inverse method, which best fits a model of artery flow and experimental measurements, and to provide a good quality of input data for the mathematical models so that proper inferences can be drown from the models. Using numerical analysis to convert the flow rate profiles to the pressure gradient profiles, a Fourier series for this profile (∂p/∂z−t) is then obtained. The results obtained were compared with pressure gradient profile in Fourier series.

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