Browsing by Author "Karimipour, Arash"

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Citation Count: Abidi, Awatef...et al. (2021). "Improve thermal performance of Simulated-Body-Fluid as a solution with an ion concentration close to human blood plasma, by additive Zinc Oxide and its composites: ZnO/Carbon Nanotube and ZnO/Hydroxyapatite", Journal of Molecular Liquids, Vol. 342.
Improve thermal performance of Simulated-Body-Fluid as a solution with an ion concentration close to human blood plasma, by additive Zinc Oxide and its composites: ZnO/Carbon Nanotube and ZnO/Hydroxyapatite
(2021) Abidi, Awatef; Jokar, Zahra; Allahyari, Seyedmahmoodreza; Kolahi Sadigh, Fereshteh; Mohammad, Sajadi S.; Firouzi, Payam; Baleanu, Dumitru; Ghaemi, Ferial; Karimipour, Arash; 56389
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, heat transfer of ZnO/Carbon Nanotube and ZnO/Hydroxyapatite in SBF was studied. After that, the results were compared experimentally and numerically. The numerical optimization was done by Artificial Neural Network and Fuzzy system. To make the ZnO/SBF mono nanofluid, first, five volume fractions of 0.2–1.0% were made. Also, ZnO-HA/SBF and ZnO-CNT/SBF hybrid nanofluid samples were made in the same volume fractions, individually. After that, heat transfer was measured at temperatures of 20–50 °C. Also, Artificial Neural Networks with Levenberg-Marquardt and Orthogonal-Distance-Regression algorithms were modeled. Then, Fuzzy system was employed to train the data with the least uncertainty. Results showed that in comparison with ZnO-SBF nanofluid, the effects of adding Hydroxyapatite and Carbon Nanotube are heat transfer enhancement of −16.73% and +17.49% at 1.0 vol% and 50 (°C), individually. Also, computational process can be employed to optimize the “nanofluid's heat transfer measurement” for cost-reduction in experiments. © 2021 Elsevier B.V.
Citation Count: Golab, Ehsan...et al. (2021). "Investigation of the effect of adding nano-encapsulated phase change material to water in natural convection inside a rectangular cavity", Journal of Energy Storage, Vol. 40.
Investigation of the effect of adding nano-encapsulated phase change material to water in natural convection inside a rectangular cavity
(2021) Golab, Ehsan; Goudarzi, Sahar; Kazemi-Varnamkhasti, Hamed; Amigh, Hossein; Ghaemi, Ferial; Baleanu, Dumitru; Karimipour, Arash; 56389
The present simulation aims to investigate adding NEPCM nanoparticles to water in the natural convection inside a cavity by using FVM method and SIMPLE algorithm. Nano-encapsulated phase change material (NEPCM) consists of a shell and core with phase change property. The NEPCM particles in base fluid have the ability to transfer heat by absorbing and dissipating heat in the liquid-solid phase change state. In this study, the energy wall phenomenon due to the phase change of NEPCM core has appeared that the whose energy transfer strength is proportional to the latent heat of NEPCM core and the thickness of the energy wall. Moreover, the relationship between the energy wall and the heat transfer rate is payed attention, and the effects of the energy wall parameters including strength, thickness, and event location of energy wall and volume fraction are studied on the energy wall and heat transfer rate. According to the obtained results, adding NEPCM to the water enhances its heat transfer up to 48% in order to increase heat capacity of water-NEPCM mixture. Also, best heat transfer rate happens when the energy wall is at the center of the cavity. Moreover, a relation is presented for the thermal expansion coefficient of NEPCM, which considers the effects of the thermal expansion coefficient of the core and shell material. © 2021 Elsevier Ltd
Citation Count: Rawa, Muhyaddin J.H...et al. (2022). "Phase change material dependency on solar power plant building through examination of energy-saving", Journal of Energy Storage, Vol. 45.
Phase change material dependency on solar power plant building through examination of energy-saving
(2022) Rawa, Muhyaddin J.H.; Abu-Hamdeh, Nidal H.; Karimipour, Arash; Nusier, Osama K.; Ghaemi, Ferial; Baleanu, Dumitru; 56389
In this study, the effect of phase change material on walls and roof considering solar intensity was discussed. Due to the geographical location of the city of Jeddah in Saudi Arabia, the effect of installing phase change material within thicknesses of 1–10 cm in the period from April 1 to September 30 was investigated. Numerical results showed that if phase change material is added to the roof (at 1 cm), the heat transfer not only did not decline but also increased. However, for the walls in the main directions, phase change material (at 1 cm) was useful. Based on the results, the western wall was the most sensitive wall to phase change material presence so that the addition of phase change material at 1–5 cm resulted in energy-saving by 2.4–7.2 kWh/m2. Although phase change material at a thickness of 1 was not useful for the roof, at thicknesses of 2–5 cm, the presence of phase change material reduced the energy exchange by 1.21–33.8 kWh/m2. Finally, it was found the best results are obtained by adding phase change material for the western wall and roof. Examining the energy-saving for building by adding phase change material, it was found that adding phase change material with thickness up to 5 cm is recommended. Further increase in thickness reduces the positive effects of phase change material.
Citation Count: Esfahani, Mohammad Behzad Botlani...et al. (2022). "The effect of sedimentation phenomenon of the additives silver nano particles on water pool boiling heat transfer coefficient: A comprehensive experimental study", Journal of Molecular Liquids, Vol. 345.
The effect of sedimentation phenomenon of the additives silver nano particles on water pool boiling heat transfer coefficient: A comprehensive experimental study
(2022) Esfahani, Mohammad Behzad Botlani; Mohammad, Sajadi S.; Abu-Hamdeh, Nidal H.; Bezzina, Smain; Abdollahi, Ali; Karimipour, Arash; Ghaemi, Ferial; Baleanu, Dumitru; 56389
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 different nanoparticle concentrations were tested, namely (0.2, 0.4, 0.6, 0.8, 1) gr/lit. The nanoparticles were synthesized using the two-step method in an aqueous base fluid. A magnetic stirrer was first used to suspend the nanoparticles, and then the stabilization was performed using an ultrasonic stirrer. The average diameter of the nanoparticles is approximately 20 nm, and the stability results indicate that the nanofluids are highly stable. The stability results from the DLS test show that changing the pH of the base fluid by 9 at a concentration of 0.4 gr/lit results in stability of −40 mV. The boiling results of the deionized water were recorded in three steps and were compared to the Rohsenow curve. The variations were very similar to the Rohsenow curve, and the change in the wall superheat and the shifting of the curve can be due to the different conditions of the experimental apparatus. The results indicate that adding silver nanoparticles leads to a decrease in the boiling heat transfer coefficient provided that the roughness parameter is smaller than or equal to unity. Increasing the concentration can reduce the deviation in the boiling heat transfer coefficient at low heat fluxes and increase it at high heat fluxes. Furthermore, boiling heat transfer on sedimentation surfaces was examined in three sedimentation steps. The results show that an increase in sedimentation and a decrease in the roughness parameter cause a reduction in the boiling heat transfer coefficient.
Citation Count: Guo, Hui-Hui...et al. (2021). "The investigation of energy management and atomic interaction between coronavirus structure in the vicinity of aqueous environment of H2O molecules via molecular dynamics approach", Journal of Molecular Liquids, Vol. 341.
The investigation of energy management and atomic interaction between coronavirus structure in the vicinity of aqueous environment of H2O molecules via molecular dynamics approach
(2021) Guo, Hui-Hui; Yazid Bajuri, Mohd; Alrabaiah, Hussam; Muhammad, Taseer; Mohammad, Sajadi S.; Ghaemi, Ferial; Baleanu, Dumitru; Karimipour, Arash; 56389
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) approach is explained. The virus behaviors by reporting the physical attributes such as total energy, temperature, potential energy, interaction energy, volume, entropy, and radius of gyration of the modeled virus are reported. The MD results indicated the atomic stability of the simulated virus significantly reduced after 25.33 ns. Furthermore, the volume of simulated virus changes from 182397 Å3 to 372589 Å3 after t = 30 ns. This result shows the atomic interaction between various atoms in coronavirus structure decreases in the vicinity of H2O molecules. Numerically, the interaction energy between virus and aqueous environment converges to −12387 eV and −251 eV values in the initial and final time steps of the MD study procedure, respectively.
Citation Count: Liu, Xinglong...et.al. (2022). "The investigation of Fe3O4 atomic aggregation in a nanochannel in the presence of magnetic field: Effects of nanoparticles distance center of mass, temperature and total energy via molecular dynamics approach", Journal of Molecular Liquids, Vol.348.
The investigation of Fe3O4 atomic aggregation in a nanochannel in the presence of magnetic field: Effects of nanoparticles distance center of mass, temperature and total energy via molecular dynamics approach
(2022) Liu, Xinglong; Fagiry, Moram A.; Mohammad, Sajadi S.; Almasri, Radwan A.; Karimipour, Arash; Li, Zhixion; Baleanu, Dumitru; Ghaemi, Ferial; 56389
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. We utilized the Lennard-Jones potential to interact between the particles, whereas the nanochannel and nanoparticles structures were simulated. To compute the atomic manner, the quantities of nanoparticles distance center of mass, and the aggregation duration were presented. The outcomes implied that the nanoparticles size had a significant role in the accumulation. As the nanoparticles’ size increased, the accumulation time of nanoparticles reached to 1.29 ns. Also, the outer magnetic field could severly postpone this event.
Citation Count: Shi, Yunhong...et al. (2021). "The Molecular dynamics study of atomic Management and thermal behavior of Al-Water Nanofluid: A two phase unsteady simulation", Journal of Molecular Liquids, Vol. 340.
The Molecular dynamics study of atomic Management and thermal behavior of Al-Water Nanofluid: A two phase unsteady simulation
(2021) Shi, Yunhong; allahyari, Seyedmahmoodreza; Mohammad, Sajadi S.; Alazwari, Mashhour A.; Firouzi, Payam; Abu-Hamdeh, Nidal H.; Ghaemi, Ferial; Baleanu, Dumitru; Karimipour, Arash; 56389
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 results show that the aggregation process enlarges by the ratio of temperature and pressure. By atomic mobility increasing, the Al nanoparticles collide with each other in a shorter simulation time. Numerically, by temperature increases from 300 K to 350 K, the aggregation time decreases from 1.33 ns to 1.18 ns. Furthermore, aggregation time increases to 1.99 ns by more pressure to 5 bar.
Citation Count: Liu, Xinglong...et al. (2022). "The Molecular Dynamics study of atomic structure behavior of LL-37 peptide as the antimicrobial agent, derived from the human cathelicidin, inside a nano domain filled by the aqueous environment", Journal of Molecular Liquids, Vol. 349.
The Molecular Dynamics study of atomic structure behavior of LL-37 peptide as the antimicrobial agent, derived from the human cathelicidin, inside a nano domain filled by the aqueous environment
(2022) Liu, Xinglong; Razi Othman, Ahmad; H. Abu-Hamdeh, Nidal; Abusorrah, Abdullah M.; Karimipour, Arash; Li, Zhixiong; Ghaemi, F.; Baleanu, Dumitru; 56389
The LL-37 peptide is an antimicrobial agent derived from human cathelicidin. In addition to their antimicrobial properties, these peptides can activate the immune system through various mechanisms and contribute to autoimmune diseases. In the current study, we describe the atomic behavior of this protein in an aqueous environment inside of metallic nanochannel (Fe nanochannel). For this purpose, Molecular Dynamics (MD) approach was implemented in equilibrium conditions. A Large Scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) is used in this computational study. Computationally, the various atoms interaction described by Universal Force Field (UFF), TIP4P, and Embedded Atom Model (EAM). Furthermore, physical factors like potential energy, temperature, Radial Distribution Function (RDF), density/velocity/temperature profiles, and protein volume were calculated for atomic behavior description of the LL-37 protein-water system. MD outputs indicated the atomic stability of protein structure in an aqueous environment inside metallic nanochannels. Numerically, the LL-37 protein volume changes from 3906.81 Å3 to 3900.11 Å3 value after t = 10 ns. Also, the maximum density and velocity/temperature profiles reach 0.0225 atoms/Å3 and 0.0124 Å/fs/435.22 K (respectively), values detected in the initial/final and middle bins MD box.
Citation Count: Alian Moghadam, Reza...et al. (2022). "Water molecules adsorption by a porous carbon matrix in the presence of NaCl impurities using molecular dynamic simulation", Journal of Molecular Liquids, Vol. 347.
Water molecules adsorption by a porous carbon matrix in the presence of NaCl impurities using molecular dynamic simulation
(2022) Alian Moghadam, Reza; Mohammad, Sajadi S.; Abu-Hamdeh, Nidal H.; Bezzina, Smain; Kalbasi, Rasool; Karimipour, Arash; Ghaemi, Ferial; Baleanu, Dumitru; 56389
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 presence of NaCl impurities by a porous carbon matrix has been investigated using the molecular dynamics method. The results show that the process of adsorption of H2O molecules by the porous carbon matrix decreases with increasing impurities in atomic structures. Increasing impurities in atomic structures disrupt the process of adsorption of H2O molecules by the porous carbon matrix. Numerically, by increasing the impurity to 20%, 56% of the H2O molecules were adsorbed on the simulated atomic matrix. Also, the increase in impurities in atomic structures increases the adsorption process of disturbing atoms by the porous carbon matrix. By increasing the impurity to 20%, 9% of the disturbing atoms were adsorbed on the simulated atomic matrix. Finally, by performing this simulation and investigating the effect of impurities on H2O absorption by porous carbon structures, it is expected that an optimal process can be designed for water treatment, which is one of the most important challenges of human societies.