19 results for "Neda Azimi"
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CFD Simulation and Enhancement of Liquid-Liquid Mass Transfer under the Effect of 1.7 MHz Ultrasonic Waves
This study investigates the two-phase flow simulation in a Y-type micromixer with a circular pit at the junction with a 1.7 MHz ultrasonic (US) transducer. A CFD simulation is conducted on the micromixer under varying fluid flow rates. Initially, the simulation is performed without US waves, and…
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Ultrasound-assisted adsorption of Cr (VI) ions from aqueous solution: Experimental study and CFD simulation
The purpose of this study was numerical and experimental investigations on the influence of ultrasound on Cr (VI) removal from aqueous solution by adsorption onto activated carbon nanoparticles. The effect of key factors on Cr (VI) elimination like media pH, absorbent mass, initial concentration of…
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Integrating the process of Ni (II) ions removal from aqueous solution and cooling of a photovoltaic module by 1.7 MHz ultrasound waves
In this study, Ni+2 removal from aqueous solution was investigated by concurrent usage of Fe3O4 nanoparticles and a high frequency ultrasound (1.7 MHz). In addition to Ni+2 removal, presence of the high frequency ultrasound led to being cooled photovoltaic (PV) module. Studied variables were pH and…
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Intensification of triphasic photocatalytic microreactor performance via high-frequency ultrasound for enhanced mass transfer and dye degradation
This study demonstrates that high-frequency ultrasound can significantly enhance mass transfer efficiency in a three-phase (gas–liquid–solid) photocatalytic microreactor, improving dye degradation performance. A custom-designed microreactor, consisting of four diamond-shaped mixing chambers, was…
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Wet-Oxidation Study of Dye Removal Using MOF-235 under Room Conditions and Optimization Process by Experimental Design
This research seeks to synthesize the metal-organic framework, MOF-235, catalyst and their effectiveness in the wet oxidation of methylene blue removal under room temperature conditions. We used SEM, EDX, TEM, and FT-IR techniques to investigate the structural and physical characteristics of the…
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CFD simulation of the effect of magnetic field on convective heat transfer and ferrofluid flow inside a pipe
Today, one of the best methods to improve heat transfer is using ferrofluid under the effect of a magnetic field. Ferrofluid is a stable suspension containing magnetic nanoparticles and a base fluid that nanoparticles has a higher heat conductivity than the base fluid. In this study, CFD simulation…
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H2S removal from crude oil flows and gas-liquid mass transfer characteristics in T-junction straight and serpentine microchannels
Abstract The petroleum industry is challenged by high energy consumption in large-scale hydrogen sulfide (H2S) removal from crude oil. This study explores crude oil stripping of H2S in straight and serpentine microchannels, providing mass transfer correlations for the process. The influence of…
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Intensification of Co(II) adsorption from aqueous solution onto Fe3O4/bentonite nanocomposite by high-frequency ultrasound waves
The effect of ultrasound on cobalt adsorption from aqueous solution onto Fe3O4/Bentonite nanocomposite is investigated. Two layouts of using shaker and sono-separator equipped with ultrasound are considered. The effect of pH on Co(II) ions removal is investigated. Co(II) removal rate increased with…
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Optimization of Operational Parameters for Bio‑Oil Production from Municipal Solid Waste via Microwave Pyrolysis
The efficiency of bio-oil production from municipal solid waste was investigated using microwave-assisted pyrolysis. The effects of temperature, pyrolysis time, and microwave power on bio-oil yield were evaluated using Response Surface Methodology (RSM), and optimal operating conditions were…
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Aggregated/agglomerated and dispersed randomly oriented wavy CNTs in electrically conductive polymer nanocomposites: Impact of dispersion quality and polymer/particle interphase
This study was dedicated to investigating the effects of clusters and dispersed randomly oriented wavy carbon nanotubes (CNTs) on the electrical conductivity of polymer nanocomposites. Firstly, the percolation theory was improved to include all determinative parameters of the system such as…
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Intensification of Liquid-Liquid Extraction in a Microreactor Equipped with Low and High-Frequency Ultrasound Waves: A Numerical Study
The aim of this study is the numerical investigation of liquid-liquid extraction inside a spiral T-microreactor integrated with ultrasonic waves. The influence of low-frequency ultrasound (20.3, 42.3, and 61.61 kHz) and high-frequency one (1.7 MHz) on extraction efficiency is evaluated by CFD…
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Caring Behaviors Inventory-24: translation, cross-cultural adaptation, and psychometric testing for using in nurses and patients
BACKGROUND: To measure caring behaviors, it is necessary to have an instrument adapted based on the contextual culture. This study aimed to translate Caring Behaviors Inventory-24 (CBI-24) into Persian and determine its psychometric properties. METHODS: This is a methodological study conducted to…
Also available at: DOAJ
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Relationship between Spiritual Well-being, Religion, and Hope among Patients with Cancer
Background & Aim: Spiritual well-being, religion, and hope are important factors in coping with cancer among patients. Nurses need to understand these concepts within a cultural context. This study aimed to determine the relationship between spiritual well-being, religion, and hope in patients with…
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Relationship Between Spiritual Well-Being, Religion, and Hope Among Patients With Cancer
Background & Aim: Spiritual well-being, religion, and hope are important factors in coping with cancer among patients. Nurses need to understand these concepts within a cultural context. This study aimed to determine the relationship between spiritual well-being, religion, and hope in patients with…
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Typology of the Confrontation of Iranian Society after Mongols’ Invasion
Entering Islamic territories in 616 AH, Mongols, led by Genghis Khan, caused outstanding changes in social and political occasions. Political, social and economic outcomes of this invasion were so highlighted that Islamic era in Iran is divided to two main times, i.e. pre and post Mongol raid eras…
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Feasibility of the Purification of Pharmaceuticals from Aqueous Solutions using Carbon Nanotubes in the Presence of Oxidizers
In this research, the methods of oxidation, oxidation along with carbon nanotubes and surface absorption of carbon nanotubes were investigated to remove the drug substance of cefixime from aqueous solutions. In these methods, the removal percentage of cefixime was 78%, 96% and 70% respectively…
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Achieving Optimal Conditions of Membrane Bioreactors for Dairy Industry Wastewater Treatment
This study investigates the two-phase flow simulation in a Y-type micromixer with a circular pit at the junction with a 1.7 MHz ultrasonic (US) transducer. A CFD simulation is conducted on the micromixer under varying fluid flow rates. Initially, the simulation is performed without US waves, and…
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Optimization of Energy in Oil Pipelines Covered with Nanofibers of Phase Change Materials Using CFD
Currently, storing energy in a suitable form that can be converted and released to the desired state is one of the challenges facing modern technologies. Energy storage not only reduces the mismatch between supply and demand, but also increases the efficiency and reliability of energy systems and…