S.Mohammad Sajadi

S.Mohammad Sajadi
Soran University · Department of petroleum Geosciences

Professor of Phytochemistry/ Nanotechnology

About

244
Publications
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14,703
Citations

Publications

Publications (244)
Article
In this study, focusing on hot zones, several different PCMs are added to the wall with the intention of forecasting the energy demand (ED) from a green building. A new PID control was approved to adjust the interior temperature compatible with PCM melting range. Preliminary calculations were performed numerically at a thickness of 1 cm, and it was...
Article
In this paper, the battery cooling is examined by placing a battery cooling system in the airflow path. The cooling system consists of 9 cylindrical battery cells so that a phase change material (PCM) surrounds them. PCM is housed in horizontal and vertical elliptical (ELL) and circular enclosures. The amount of PCM used in enclosures is equal and...
Article
In this study, a hot and desert location with an annual temperature of 27.1 °C and a very high radiation intensity of 2143 kWh/m², a solar system (ES) was approved to provide building cooling necessities. The cooling system, by connecting to the solar system, supplied a part of its required energy. The outer layer of the building walls was equipped...
Article
One of the most important feature of any desalination technology is energy consumption of producing fresh water specially when its energy source is solar energy. To improve this, study of various input parameters and determination of their effects on energy consumption would be essential. In this paper, a one-dimensional model is used to investigat...
Article
The solar source, although it can reduce energy consumption (EC) for buildings on cold days, in the summer, its presence on the envelopes intensifies EC. In this study, two techniques were used to make better use of solar energy. In the first method, phase change material (PCM) was used on the envelopes to absorb the sun's rays, thus eliminating su...
Article
The thermal and hydraulic efficiency of a parabolic trough solar collector is investigated in this study. The collector absorber tube is equipped with twisted tape with circular holes containing water-copper oxide nanofluid with three nanoparticles volume fractions of 1%, 2% and 4%. In three modes (d/W = 0.5, 0.7, 0.9), circular holes are construct...
Article
Among energy storage devices (ESDs), lithium-ion batteries (LIBs) have widespread utilization in cleaner productions. Hence, accurate estimation of the state of LIBs has attracted the attention of many researchers. On the other hand, the design of LIBs requires a compromise between large groups of effective factors. Machine learning (ML) utilized i...
Article
In this work, a battery pack (BAPA) containing 21 cylindrical battery cells was investigated. Active and passive approaches are used to regulate the battery's thermal management (THM). An enclosure packed with phase change material (PCM) surrounding the battery is employed for passive heat control. For the active method, forced airflow is utilized....
Article
This paper simulates a battery pack with 45 lithium-ion battery cells. As the coolant in the laminar flow range, the air fluid is responsible for cooling these cylindrical batteries. The battery cells are arranged in three different shapes, lozenge, rectangle and triangle. By changing the Re in the range of 500 to 2000, the temperature values of th...
Article
In this paper, the thermal management (THM) of a battery pack (BPK) with 9 cylindrical batteries is numerically modeled. The batteries are 18,650 lithium-ion (LIN) type, which are placed in an air duct. A capsule of Phase Change Materials (PCM) is placed around all the LIN battery cells. The PCM used was CaCl 2 .6H 2 O, which was oval in the PCM ca...
Article
A new antifreeze hybrid nanofluid is developed in the present study. The hydrodynamic and thermal properties of the base fluids, such as water and Ethylene glycol are improved via examining the Nanoparticles. The final achieved nanofluid will be used for the cooling batteries; however, it might be applied for similar mechanical/ electrical systems...
Article
Full-text available
In these days, laser is a useful and valuable tool. Low input heat, speed, accuracy, and high controllability of laser welding have led to widespread use in various industries. Nickel-based superalloys are creep-resistant materials used in high-temperature conditions. Also, these alloys have high strength, fatigue, and suitable corrosion resistance...
Article
There are ever increasing concerns about environmental and health hazards of conventional synthetic polymers. These polymers are not sustainable because their production process relies on fossil-based feedstocks and energy sources. Economic benefits and beneficial physicochemical and mechanical properties have made synthetic polymers to be used in...
Article
This paper investigates the turbulent flow of nanofluid (NFs) in which boehmite-alumina nanoparticles with different shapes of platelet, brick, blade, and cylinder suspended in a mixture of W/EG in a flat plate solar collector (FPSC). A hexagonal cross-sectional tube is used in the FPSC and compared with a simple one. The problem variables include...
Article
Designing biomaterials capable of biomimicking wound healing and skin regeneration has been receiving increasing attention recently. Some biopolymers behave similarly to the extracellular matrix (ECM), supporting biointerfacial adhesion and intrinsic cellular interactions. Polydopamine (PDA) is a natural bioadhesive and bioactive polymer that endow...
Article
Aerogel-based polymer composite foams are promising for large strain piezoresistive sensors, but their aerogel skeleton is partially destroyed during the foaming process, limiting their sensitivity. Herein, the thermoplastic polyurethane was synthesized on the aerogel skeleton to obtain cellulose/multiwalled carbon nanotubes (MWCNTs)/thermoplastic...
Article
Higher than a standard level, the humidity provides a suitable environment for the pathogenic microorganisms to grow and increases energy consumption for cooling, increasing greenhouse gas emissions. Desiccant air-conditioning (DAC) is an effective method to reduce humidity and energy simultaneously. Conventional desiccants are not suitable for use...
Article
In the current research, we described atomic vacancy defect influence on nanopumping performance of CNT structure with molecular dynamics (MD) method (for the first time). In our simulations, CNT structure is defined in the presence of C20 molecule and Au tips in the nanopumping process. Temperature and potential energy convergence after 1 ns indic...
Article
Since Lithium-Ion Batteries (LIBs) have been major power sources for Electric Vehicles (EVs) and Energy Storage Devices (ESDs), Battery Thermal Management (BTM) has attracted the attention of numerous investigators. On the other hand, the application of Phase Change Materials (PCMs) in heatsinks (HSs) is an effective technique that has been approve...
Article
Full-text available
In this paper, the effect of using an elliptical chamber around a battery pack with three lithium-ion battery cells is studied numerically. The cylindrical batteries are located in the middle of the oval chamber, and the elliptical chamber, which is full of Phase-Change Materials (PCM), is inside an air duct. Numerical solution was performed using...
Article
In this paper, a pack of 9 lithium-ion cylindrical batteries is numerically evaluated. This battery is charged by a solar panel. An enclosure is considered for the batteries to cool them using airflow. The two-dimensional analysis is performed for its critical conditions. For this purpose, the effect of the distance between the batteries in the ran...
Article
In arid climate zones, more than 70% of electricity is used for cooling purposes on hot days of the summer. On the other hand, in these areas, the intensity of radiation is so high that it can be called a stable source of energy for cooling. This study is focusing on the ejector cooling method. Two procedures are employed to reduce energy consumpti...
Article
Nanocellulose is the “green magnet” which attracts a wide spectrum of industries towards it due to its availability, biodegradability, and possible smart applications. For the first time, pineapple pomace was being explored as an economic precursor for cellulose nanofibers. Nanofiber isolation was accomplished using a chemo-mechanical method and so...
Article
The efficiency of pollutant rejection (PR, %) and water purification of the zeolite membranes is highly dependent on their topology, i.e., porosity and chemical composition. Nevertheless, mechanisms controlling such a physicochemical phenomenon have been limitedly discussed. Herein, we provide insights into the physics and dynamics of water purific...
Article
Full-text available
Objectives To use data from the Global Burden of Diseases, Injuries, and Risk Factors Study 2019 (GBD 2019) to estimate mortality and disability trends for the population aged ≥70 and evaluate patterns in causes of death, disability, and risk factors. Design Systematic analysis. Setting Participants were aged ≥70 from 204 countries and terri...
Article
Full-text available
One of the most arduous challenges in tissue engineering is neovascularization, without which there is a lack of nutrients delivered to a target tissue. Angiogenesis should be completed at an optimal density and within an appropriate period of time to prevent cell necrosis. Failure to meet this challenge brings about poor functionality for the tiss...
Chapter
The food industry is generating huge amounts of by-products, about 1,890,000 tons, which should be better recycled into pharmaceuticals, cosmetics and functional foods, for instance, in order to save costs and avoid pollution. Here we review food by-products and methods of extraction. We present bioactive compounds from fruits, vegetable, tea, coff...
Article
In general, phase change materials reduce energy consumption in different structures by increasing the thermal conductivity or decreasing the phase change time. On the other hand, hydrated salts are the most important group of phase change materials with high phase change temperatures and are extensively studied in latent thermal energy storage sys...
Article
This paper analyses an air conditioning system (ACS) of a building using phase change materials (PCMs) numerically. PCMs of CaCl2.6H2O are placed inside the tubes in the ACS. The tubes are linearly arranged in 10 rows, with 17 tubes in each row. The freezing time of PCM is estimated by changing the diameter of the tubes in the range of 1–3 cm, the...
Article
Full-text available
Introduction: Carbon nanotubes (CNTs) have been widely employed as biomolecule carriers, but there is a need for further functionalization to broaden their therapeutic application in aqueous environments. A few reports have unraveled biomolecule-CNT interactions as a measure of response of the nanocarrier to drug-encapsulation dynamics. Methods:...
Article
Several chemical solutions have been used to improve oil recovery as enhanced oil recovery (EOR) effective agents. However, the conventional chemical EOR solutions face some difficulties and challenges in the mobilizing and displacing the crude oil in the porous media. Nowadays, nanofluids (a mixture of nanoparticles and fluid) are used for EOR app...
Article
Full-text available
Background In estimating the global burden of cancer, adolescents and young adults with cancer are often overlooked, despite being a distinct subgroup with unique epidemiology, clinical care needs, and societal impact. Comprehensive estimates of the global cancer burden in adolescents and young adults (aged 15–39 years) are lacking. To address this...
Article
Thermal management of battery Air cooler Phase change material Circular chamber Cylindrical lithium-ion battery (CLIB) A B S T R A C T Batteries are utilized to store electrical energy in various devices due to their industrial importance, So in this paper, airflow is simulated in a channel to cool a two-dimensional, transient lithium-ion battery c...
Article
Polysaccharides (PSA) are taking specific position among biomaterials for advanced applications in medicine. Nevertheless, poor mechanical properties is known as the main drawback of PSA, which highlights need for PSA...
Article
Batteries are utilized to store electrical energy in various devices due to their industrial importance, So in this paper, airflow is simulated in a channel to cool a two-dimensional, transient lithium-ion battery cylindrical cell. There is a circular PCM chamber around the battery. Battery cooling is evaluated by changing the aspect ratio of the P...
Article
Graphene-like nanosheets are the key elements of advanced materials and systems. The mechanical behavior of the structurally perfect 2D nanostructures is well documented, but that of polycrystalline ones is less understood. Herein, we applied molecular dynamics simulation (MDS) to take the fracture fingerprint of polycrystalline SiC nanosheets (PSi...
Article
The computational procedure was utilized to explain the size effect of Fe3O4 nanoparticles on atomic behavior and phenomena of nanoparticles accumulation in nanochannel of ideal platinum (Pt) and the external magnetic field. Argon (Ar) atoms were considered as the base liquid, and the molecular dynamics procedure was utilized in this investigation....
Article
Full-text available
Simulation of thermal properties of graphene hetero-nanosheets is a key step in understanding their performance in nano-electronics where thermal loads and shocks are highly likely. Herein we combine graphene and boron-carbide nanosheets (BC3N) heterogeneous structures to obtain BC3N-graphene hetero-nanosheet (BC3GrHs) as a model semiconductor with...
Article
Considering the 66% share for cooling and 3% for building heating in Saudi Arabia, the effect of PCM on reducing energy consumption by focusing on summer setpoint temperatures (STsummer) was examined. A 2 cm layer of RT-25HC (22–26°C) was added to the wall and ceiling with thermal resistances of 0.723 and 1.057 m2.KW. At STsummer=22°C, RT-25HC resu...
Article
In this work, the nanofluid flow inside a microchannel with serrated injection jet on the upper wall of microchannel and using magnetic field with intensity of 0–40 Hartman were surveyed. The lower microchannel wall with jet injection racks has a constant temperature, but the upper microchannel wall is insulated among injection jets. Applying dente...
Article
Full-text available
In this numerical work, the cooling performance of water–Al 2 O 3 nanofluid (NF) in a novel microchannel heat sink with wavy walls (WMH-S) is investigated. The focus of this article is on the effect of NP diameter on the cooling efficiency of the heat sink. The heat sink has four inlets and four outlets, and it receives a constant heat flux from th...
Article
Full-text available
The liquid desiccant air conditioning system is amongst the promising technologies for the provision of efficient air conditioning, particularly in hot humid climate conditions. By their benefits, membrane-based dehumidification systems have drawn large attention. Various techniques are used to enhance the performance of different dehumidification...
Article
In the present paper, the effect of graphene nanoparticles (NPs) in Calcium Chloride Hexahydrate (CaCl2.6H2O)-based Phase Change Material (PCM) on its melting and freezing time is investigated. The simulations are performed on a novel geometry involving a two-dimensional tube with a triangular obstacle. In PCM charging mode, the internal obstacle i...
Article
Today, one of the most important issues in human societies is environmental protection and material recycling. Due to their high surface area and high porosity, porous carbon can be used in different fields of catalytic, recycling, separation, storage, drug delivery, etc. In the present study, the process of adsorption of H2O molecules in the prese...
Article
In this study, the thermal behavior of the wall by adding phase change material in the presence of solar radiation was investigated. Phase change material with a melting point of 21–23 °C was added to the wall and then its effect on heat transfer was inspected. By numerically solving the energy equation, the temperature distribution within the wall...
Article
In this paper, a cooling chamber of a 9 Li-ion battery pack is numerically investigated. The effect of the outlet location is studied when the inlet is fixed and changing the outlet location varies. The battery has a cylindrical shape, and the air is used as the working fluid. This study is performed for three different Richardson numbers (Ri) in t...
Article
Full-text available
In this study, the efficacy of loading graphene oxide and copper oxide nanoparticles into ethylene glycol-water on viscosity was assessed by applying two numerical techniques. The first technique employed the response surface methodology based on the design of experiments, while in the second technique, artificial intelligence algorithms were imple...
Article
Full-text available
In this article, alumina/water nanofluid (NF) flow in a heatsink (H-S) with wavy microchannels (W-MCs) is simulated. The H-S is made of aluminum containing four similar parts. Each part has an inlet and outlet. Constant heat flux is applied on the bottom of the H-S. The study is based on two-phase (T-P) mixture and single-phase (S-P) models to dete...
Preprint
Full-text available
In these days, laser is a useful and valuable tool. Low input heat, speed, accuracy, and high controllability of laser welding have led to widespread use in various industries. Nickel-based superalloys are creep-resistant materials used in high-temperature conditions. Also, these alloys have high strength, fatigue, and suitable corrosion resistance...
Article
The purpose of this study is to assess the impact of a wide variety of parameters to maximize the heat transfer rate using nanofluid, baffles, different Reynolds numbers (Re), different tube arrangements, and various geometry dimensions using the multi-objective genetic algorithm (MOGA) algorithm. The ANSYS FLUENT software, the SIMPLE algorithm as...
Article
The purpose of the present work is to investigate the effect of the angle of application of magnetic field in two types of uniform and non-uniform on the nanofluid flow characteristics and natural convection heat transfer in the presence of uniform heat generation. This numerical study was performed using multi relaxation time lattice Boltzmann met...
Article
Full-text available
Anemia is a globally widespread condition in women and is associated with reduced economic productivity and increased mortality worldwide. Here we map annual 2000–2018 geospatial estimates of anemia prevalence in women of reproductive age (15–49 years) across 82 low- and middle-income countries (LMICs), stratify anemia by severity and aggregate res...
Article
Nowadays, the increase in the number of nanoparticles in base fluids is considered as one of the most significant causes of change in thermodynamic properties and boiling heat transfer coefficient. Hence, the present study aims to examine the effects of different concentrations of silver nanoparticles on pool boiling inside deionized water. Five di...
Article
Full-text available
Background Documentation of patterns and long-term trends in mortality in young people, which reflect huge changes in demographic and social determinants of adolescent health, enables identification of global investment priorities for this age group. We aimed to analyse data on the number of deaths, years of life lost, and mortality rates by sex an...
Article
In this article, the estimation of CuO-liquid paraffin nanofluid viscosity was assessed using response surface method (RSM) and artificial neural network (ANN) methods. Since CuO-liquid paraffin nanofluid is Newtonian, two parameters of temperature and mass fraction were introduced in ANN and RSM techniques at 25–100 °C, 0.25–6 wt.%. Both methods m...
Article
Full-text available
In this paper, a common and widely used micro-heat sink (H/S) was redesigned and simulated using computational fluid dynamics methods. This H/S has a large number of microchannels in which the walls are wavy (wavy microchannel heat sink: WMCHS). To improve cooling, two (Al2O3 and CuO) water-based nanofluids (NFs) were used as cooling fluids, and th...
Article
This study aimed to investigate the accuracy of the artificial neural network in estimating thermal conductivity (k) of ferrofluid-based nanofluids. The parameters of kND+Fe2O3/EG−water and kEG−water have been measured at 20–60°C, 0.05, 0.1, and 0.2 vol.% and the results showed that kFe2O3/EG−water was greater than kEG−water by 89%, which is obtain...
Article
Graphene is simply one atomic layer of graphite, which can be synthesized from Flake Graphite, through Top-Down method. It has applications in thermal and energy systems such as Solar collector. A Flat-plate Solar collector collects the sunlight and transfers the heat energy to the tubes. The used fluid can be Nanofluid. In this study, first, Graph...
Article
Full-text available
In industrial processes, the microtechnology concept refers to the operation of small devices that integrate the elements of operational and reaction units to save energy and space. The advancement of knowledge in the field of microfluidics has resulted in fabricating devices with different applications in micro and nanoscales. Micro- and nano-devi...
Article
The operation of heat sinks is completely dependent on temperature, and if the temperature rises above the allowable range, the efficiency drops sharply. In this study, the main purpose is to keep an electronic component cool by installing cylindrical pin-fins with a diameter of D. By changing the diameter of the pin-fins, the variations in pressur...
Article
The coronavirus pandemic is caused by intense acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Identifying the atomic structure of this virus can lead to the treatment of related diseases in medical cases. In the current computational study, the atomic evolution of the coronavirus in an aqueous environment using the Molecular Dynamics (MD) ap...
Article
Nanofluid is a suspension of Nanoparticles in a basefluid. Typical fluids carry less heat transfer than nanofluids. However, the perception of heat transfer for bio-nanomaterials can help scientists in fields as implant coatings, nano-robotics, etc. In this research, heat transfer of Zinc Oxide (ZnO) in Simulated-Body-Fluid (SBF) was studied. Then,...
Article
Herbal medicine wastes (HMWs) are byproducts of medicine factories, which are mainly landfilled for their environmental problems. Only bearing in mind the contamination and concerns caused by the COVID-19 pandemic and environmental emissions, the worth of herbal medicine wastes management and conversion to green products can be understood. In this...
Article
In this research, the effect of using GO/ water nanofluid as a coolant fluid in an isothermal heat transfer system was studied. At first, to evaluate the atomic bond, chemical, and surface structure of the nanoparticles, XRD-FTIR and FESEM tests were used. Two-step method was used to prepared nanofluid then DLS test was utilized to examine the stab...
Article
Introduction: Chemotherapy with anti-cancer drugs is considered the most common approach for killing cancer cells in the human body. However, some barriers such as toxicity and side effects would limit its usage. In this regard, nano-based drug delivery systems have emerged as cost-effective and efficient for sustained and targeted drug delivery....
Article
Molecular Dynamic (MD) approach is used to describe the temperature and pressure effects on the Al nanoparticles aggregation process in the aqueous environment of water as the base liquid. For this goal, various physical parameters like total energy, temperature, aggregation time, and total energy of the simulated structures, are reported. The resu...
Article
MEL-type zeolite was selected as a typical porous material to theoretically capture the purification scenario of a model landfill leachate comprising PbCl2 and CuCl2 varying the pressure (2.4–48 MPa). Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) was applied to simulate the equilibrium state (0.5 ns) and dynamics of Pb2+, Cu2+...