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Your search keyword '"Nezhad, Erfan Zal"' showing total 19 results
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19 results on '"Nezhad, Erfan Zal"'

9. Characterization of thermal resistance and mechanical strength recovery of carbon-nanotube-incorporated Portland cement composites subjected to heating and rehydration: Visualization of pore structural evolutions via synchrotron 3D X-ray nanoimaging

Author

Suh, Heongwon, primary, Cho, Seongmin, additional, Im, Sumin, additional, Moon, Jaegeun, additional, Park, Jaeyeon, additional, Lim, Jun, additional, Nezhad, Erfan Zal, additional, Seok, Seungwook, additional, Bae, Baek-Il, additional, and Bae, Sungchul, additional

Published
2023
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10. Design and Performance Evaluation of a Novel Spiral Head-Stem Trunnion for Hip Implants Using Finite Element Analysis

Author

Soliman, Md Mohiuddin, primary, Chowdhury, Muhammad E. H., additional, Islam, Mohammad Tariqul, additional, Musharavati, Farayi, additional, Mahmud, Sakib, additional, Hafizh, Muhammad, additional, Ayari, Mohamed Arselene, additional, Khandakar, Amith, additional, Alam, Mohammad Kaosar, additional, and Nezhad, Erfan Zal, additional

Published
2023
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11. Surface Acoustic Wave (SAW) Sensors for Hip Implant: A Numerical and Computational Feasibility Investigation Using Finite Element Methods

Author

Hafizh, Muhammad, primary, Soliman, Md Mohiuddin, additional, Qiblawey, Yazan, additional, Chowdhury, Muhammad E. H., additional, Islam, Mohammad Tariqul, additional, Musharavati, Farayi, additional, Mahmud, Sakib, additional, Khandakar, Amith, additional, Nabil, Mohammad, additional, and Nezhad, Erfan Zal, additional

Published
2023
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12. A Review of Biomaterials and Associated Performance Metrics Analysis in Pre-Clinical Finite Element Model and in Implementation Stages for Total Hip Implant System

Author

Soliman, Md Mohiuddin, primary, Chowdhury, Muhammad E. H., additional, Islam, Mohammad Tariqul, additional, Musharavati, Farayi, additional, Nabil, Mohammad, additional, Hafizh, Muhammad, additional, Khandakar, Amith, additional, Mahmud, Sakib, additional, Nezhad, Erfan Zal, additional, Shuzan, Md Nazmul Islam, additional, and Abir, Farhan Fuad, additional

Published
2022
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16. Study on start-up characteristics of H-Darrieus vertical axis wind turbines comprising NACA 4-digit series blade airfoils

Author

Asr, Mahdi Torabi, Nezhad, Erfan Zal, Mustapha, Faizal, Wiriadidjaja, Surjatin, Asr, Mahdi Torabi, Nezhad, Erfan Zal, Mustapha, Faizal, and Wiriadidjaja, Surjatin

Abstract

Installation of H-type vertical axis wind turbines is in many cases limited by the inherent start-up issues associated with this type of turbine. This could be crucial in environments with low wind speed. The aim of this study is to provide an appropriate CFD modeling setup for investigation of the start-up behavior associated with this class of turbines. For this purpose, a series of transient CFD simulations were carried out using ANSYS Fluent. In contrast with the conventional approach, whereby a constant angular velocity is specified for the rotor, in the present work, the turbine was left free to accelerate based on the torque experienced over time. Careful considerations were made regarding turbulence modeling and grid generation, which are key to ensuring accuracy in this investigation. The result of this simulation, in the form of an accelerating time series, demonstrates good agreement with the published experimental data, and the method yields a high level of accuracy, proving its usefulness for similar problems. In another attempt, the validated CFD setup was utilized to evaluate the effects of several geometric attributes of the turbine rotor on the starting characteristics. Symmetric and cambered airfoils of different thicknesses with a wide range of pitch angles were examined. The optimum start-up characteristics were observed with the use of a medium-thickness cambered airfoil, NACA2418, put to use with an outward pitch angle of 1.5°; this configuration decreased the start-up time while retaining the turbine's peak performance.

Published
2016

18. Electrodeposited nickel aluminum-layered double hydroxide on Co3O4 as binder-free electrode for supercapacitor.

Author

Chen, Xin, Yuzhi, Heng, Hui, Li, Bae, Sungchul, Ang, Li, Wang, Zhen, Hui, Kwan San, Hui, Kwun Nam, and Nezhad, Erfan Zal

Subjects
NICKEL-aluminum alloys, ELECTROPLATING, SUPERCAPACITORS, HYDROXIDES, GRAPHENE oxide
Abstract

Here, we report a heterostructured core-shell electrode consists of cobalt oxide (Co3O4) nanowire core and nickel aluminum (NiAl)-layered double hydroxide (NiAl-LDH; herein Co3O4@LDH) nanosheet shell grown on nickel foam as advanced electrode for supercapacitor. Benefiting from the core-shell configuration and smart hybridization, the optimized Co3O4@LDH core-shell electrode exhibits a high capacitance of 2011 F g−1 at 2 A g−1 and remains 1455 F g−1 at 40 A g−1, which outperforms the electrochemical performance of individual component of Co3O4 (720 F g−1 at 2 A g−1). A hybrid supercapacitor using Co3O4@LDH as positive electrode and carbon nanotube as negative electrode delivers an energy density of 18.1 Wh kg−1 at a power density of 375 kW kg−1 at a current density of 0.5 A g−1. Smart hybridization of core-shell electrode shows great promise as advanced electrode materials for supercapacitor with high electrochemical performance. [ABSTRACT FROM AUTHOR]

Published
2019
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