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Open Access Article
1 - Numerical investigation of the fullerene and doped fullerene effects on thermal performance of water base-fluid
Ahmad Saadi Hamid Reza Vanaie Mojtaba Yaghobi Ebrahim Heidari Darush Masti -
Open Access Article
2 - Kaluza-Klein interacting cosmic fluid cosmological model
Kishor S Adhav Meena V Dawande Soniya M Borikar -
Open Access Article
3 - Modeling of Supercritical Extraction of Essential Oil from Orange Peel
Marjan Haghayegh Seyyed Ali Vaziri Fatemeh Zabihi Mohammad Hassan EikaniIntroduction: Supercritical fluid extraction (SCFE) is a promising technique that has been attracted by some scientist recently due to the moderate operational condition.Moreover, SCFE products are pure and free of residual solvents. Mathematical modeling of supercritic MoreIntroduction: Supercritical fluid extraction (SCFE) is a promising technique that has been attracted by some scientist recently due to the moderate operational condition.Moreover, SCFE products are pure and free of residual solvents. Mathematical modeling of supercritical extraction is a useful tool for deducing the SCF extraction systems, prediction of optimum operational conditions and system design variables, and scale-up to the pilot and industrial scales. Materials and Methods: A new mathematical model modified by Sovova, based on the concept of broken and intact cells, has been applied to understand the variables effect on extraction efficiency in a SCF extraction system. System was made in order to extract the essential oil from orange peel. This model simulates the experimental data points adequately for two separate time using combined pattern of phase equilibrium equations, solute/matrix interaction and internal diffusion rules in the solid particles. Model equations for plug flow are ordinary differential equations and are solved by matlab using numirical method. A number of physical parameters have been determined by experimental data fitting.Results: Extraction curves have been presented on the form of extraction yield versus relative amount of passed solvent. The effect of operational parameters including grinding efficiency, bed void fraction, number of mixers and external mass transfer coefficient have been also investigated.Conclusion: The most desirable result is obtained from grinding efficiency and external mass transfer coefficient of 0.7 and 0.011 respectively, within 20 mixers. The model results present a good agreement with the experimental results. Average absolute deviation between experimental data and the modeling results is about 6%. Manuscript profile -
Open Access Article
4 - Investigation of Quality and Quantity of Waste Generation in South Azadegan Oil Field (Southwest of Iran)
Zhinoos Tavakoli Hossein Sakhaeinia Farshid Pajoum ShariatiBackground and Objective: Oil fields can be considered as a major waste resource that leads to considerable adverse effects on human health and the environment. The aim of this study was to investigate the quality, quantity and type of waste generated in the oil field o MoreBackground and Objective: Oil fields can be considered as a major waste resource that leads to considerable adverse effects on human health and the environment. The aim of this study was to investigate the quality, quantity and type of waste generated in the oil field of South Azadegan. Material and Methodology: The present work reviewed the quality and quantity of waste generated in the south Azadegan oil field (Southwest of Iran) according to the production point and operation unit and waste classification. The present work was conducted in 2020 and firstly the various sectors of waste generation were identified and classified. Then a questionnaire was provided and distributed to all sectors for data collection. Ethical issues were considered at all stages. Fidings: The results showed that some recyclable wastes (approximately 35%) and organic waste (63.5%) were generated in the restaurant unit and the total weight of healthcare waste was 50Kg/year that include 28% non-infectious and 72% infectious waste. The engineering and sanitation unit of south Azadegan. produce the most waste generated in this area and the most wastes generated in this unit was drilling rig and fluids. Also, the chemical analysis of drilling rigs showed that the concentration of heavy metals in these samples is high. Discussion & Conclusion: According to the results, it should take into consideration that various wastes have been generated in studied area, some of which are hazardous, and new strategies should be used to protect the environment. Manuscript profile -
Open Access Article
5 - Study on the Thermophysical Properties of Hybrid Nanofluid Based on Aircraft De/Anti-Icing Fluid at Low Temperatures
Nasim Nayebpashaee -
Open Access Article
6 - Is skarnization the cause of mineralization? a case study, Sanandaj Sirjan zone, west Iran
Hossein Moinevaziri Hossein Azizi -
Open Access Article
7 - CO2-H2O, Highly Saline and Carbonic Fluids from the Mesozoic Mashhad Granitoids, NE Iran
C. Srikantappa M. R. Kalantari M. N. MalathiThe Mesozoic Mashhad granitoid plutons have intruded into ophiolite complexes, meta-sediments and pyroclastics in the Binalood region, located SW of Mashad city in the NE part of Iran. Based on petrography and geochemistry, the Mashhad granitoids have been classified in MoreThe Mesozoic Mashhad granitoid plutons have intruded into ophiolite complexes, meta-sediments and pyroclastics in the Binalood region, located SW of Mashad city in the NE part of Iran. Based on petrography and geochemistry, the Mashhad granitoids have been classified into 1) grey granite, 2) pink granite, 3) muscovite granite, 4) granodiorite and 5) pegmatite and quartz veins. Granitoids show typical igneous micro-textures with the mineral assemblage of quartz, plagioclase, K-feldspar, biotite, muscovie, amphiboles, clinopyroxene and garnet. Based on two-feldspar thermometry and hornblende-plagioclase thermometry / barometry, igneous temperatures of 750 to 770oC and pressures of 4.6 to 5.5 kbars for the emplacement of granitoids have been estimated. The granitoids of Mashhad area have been classified as moderately peraluminous, S to I type granitoids of sub-alkaline to calcic type. Fluid inclusion study on Mashhad granitoids shows the presence of Isolated Fluid Inclusions (IFI) as well as Trail Bound Inclusions (TBI). Four types of fluid inclusions viz., Type I CO2-H2O inclusions, Type II Low salinity aqueous inclusions, Type III, high salinity inclusions and Type IV Carbonic inclusions have been recorded in Mashhad granitoids. Fluid inclusions occur as rounded, oval and negative crystal shape varying in size from 5 to 16 μm. CO2-H2O fluids are the most common fluids in Mashhad granitoids. CO2 in CO2-H2O inclusions varies from 20 to 80 percent. Minor bi-phase, low salinity aqueous inclusions occur. Presence of Type III, Halite bearing fluids are found mainly in quartz veins in granodiorite. Type IV, carbonic fluids occur along late fractures which cross-cut the early Type I, CO2-H2O fluids. CO2 in CO2-H2O inclusions shows Tm around -56.8 oC, indicating almost pure carbonic inclusions. TmClath vary from 4 to 8oC. Th of CO2 in liquid phase ranges from - 9 to 22o C with densities of 0.92 to 0.68 g/cc and the total homogenization of CO2-H2O ranges from 205 to 320oC, indicating XCO2 valuesof 0.75 to 0.20 mole fraction. The bi-phase fluid inclusions show low salinity values of 4 to 8 wt. % NaCl equivalent to 1.03 to 0.96 g/cc. Type-IV, late carbonic inclusions show Th ranging from 20 to 25°C with densities from 0.82 to 0.78 g/cc. Tye III, halite bearing fluids show temperatures of melting from 315 to 335oC with salinity values of 38 to 40 wt. % NaCl equivalent. The density data of fluids in Mashhad granitoids indicates entrapment temperatures of 590 to 650oC at pressures of 4.1 to 5.2 Kbar. This data nearly coincides with the mineral P-T estimates. There are strong evidences of “fluid-present” partial melting process during the formation of S-type and I-type granitoids in Mashhad area. The low density carbonic fluids are chronologicaly late fluids trapped in granitoids, formed due to the peferential leakage of water from the early CO2-H2O inclusions. Fluid leakage is related to ductile shear deformation along thrust zones in Mashhad granitoids. Manuscript profile -
Open Access Article
8 - Laminar flow modeling of different nano fluids around a flat plate fin for geometry optimization at the heat sink
seyyed mohammad javad taheri Ali HeydariThis paper presents a mathematical model for geometry optimization of a rectangular cross-section flat plate fin with application in calculating optimized width of a heat sink for different Nano fluids (Aluminum oxide, Silicon dioxide, Titanium dioxide, Copper oxide, Go MoreThis paper presents a mathematical model for geometry optimization of a rectangular cross-section flat plate fin with application in calculating optimized width of a heat sink for different Nano fluids (Aluminum oxide, Silicon dioxide, Titanium dioxide, Copper oxide, Gold, Copper, Diamond and Ferros oxide) with water as based fluid. Flow impinging on the fin is considered laminar. The effects of Reynolds number, volume fraction of nanoparticles, particle size, inlet velocity and different average temperature on the geometry optimization of the fin are investigated. A rectangular flat plate fin made from copper with higher thermal conductivity is used as the test case. Various Nano fluids with different volume fractions (0.005% to 0.1%) and different nanoparticle sizes (3×10-8 to 1×10-7 nanometer) are analyzed. In this analysis, as a basic assumption, the length of the fin is taken larger than the width and the fin volume is considered constant. Then, width of the fin will be optimized. The results indicated that the highest and the lowest optimized width is related to Gold and silicon dioxide nano fluids respectively. Increase in volume fraction, inlet velocity and temperature and decrease in nano particle size leads to optimized width enhancement. Manuscript profile -
Open Access Article
9 - Experimental studies on the convective heat transfer of MgO–water nanofluid
mohammad ghavidel Seyfolah SaedodinThe present study aimed to investigate the convective heat transfer coefficient of nanofluids containing magnesium oxide nanoparticles in water-based fluid in the exchanger plates have been carried out. Tests on the volume fraction of (0.005, 0.01, 0.015and 0.02) were u MoreThe present study aimed to investigate the convective heat transfer coefficient of nanofluids containing magnesium oxide nanoparticles in water-based fluid in the exchanger plates have been carried out. Tests on the volume fraction of (0.005, 0.01, 0.015and 0.02) were used in this study have Ast.nanvzrh which has a diameter of 20 nm. Also the results show that with increasing fraction nanofluid volume, heat transfer coefficient and thus increases the heat transfer. Also heat transfer nanofluids% increase in volume fraction of 0.02 to 0.005 respectively 52% and 4.3% is on. Manuscript profile -
Open Access Article
10 - Experimental study of dynamic viscosity of the fluid water-based nanofluids magnesium oxide
محمد قویدل سیف الله سعدالدینIn this study, the dynamic viscosity of the fluid is water-based nanofluids magnesium oxide discussed. The experiments in four volume fraction (0.005, 0.01, 0.015 and 0.02) and four different diameter nanoparticles 20, 40, 50 and 60 nm were used. The results obtained in MoreIn this study, the dynamic viscosity of the fluid is water-based nanofluids magnesium oxide discussed. The experiments in four volume fraction (0.005, 0.01, 0.015 and 0.02) and four different diameter nanoparticles 20, 40, 50 and 60 nm were used. The results obtained in this way is that by increasing the volume fraction of a specified diameter, the viscosity of nanofluids increases and by increasing the diameter Nanvdrh in a specified volume fraction, the viscosity of nanofluids decreases the viscosity reduction benefits of using nanofluids in the industry more. Manuscript profile -
Open Access Article
11 - Numerical modeling of tool-joint effect on non-Newtonian drilling fluids following the Herschel–Bulkley model flow behavior in oil well drilling
Mohamad Moradmand ZiabariIn this paper, the behavior of fluid flows and frictional pressure losses in weld-on tool-joints of different grades according to the IADC standard manual was studied using CFD simulations. The simulations were conducted using six drilling fluids with different viscopla MoreIn this paper, the behavior of fluid flows and frictional pressure losses in weld-on tool-joints of different grades according to the IADC standard manual was studied using CFD simulations. The simulations were conducted using six drilling fluids with different viscoplastic properties, following the Herschel–Bulkley model of Non-Newtonian fluids.( these six fluids used in oil fields in the south of the country). Also Power-Law and Newtonian models are used for validation. Then the effect of geometric variables like diameter ratio and eccentricity of the circular space in this particular geometry is investigated. The results show that tool-joints significantly affect the frictional pressure loss in the annulus.The frictional pressure loss increased up to 18% for Newtonian model and up to 7% and 3% for Power-Law and Herschel-Bulkley models respectively. Manuscript profile -
Open Access Article
12 - Chemical synthesis and characterization of Zn-doped cadmium oxide based nanoparticles: As nanofluids for thermophysical applications
M Sheela Pauline W A Samson Nesaraj -
Open Access Article
13 - An investigation of carbon nanotubes on shear stress, thermal conductivity and the viscosity of Nanofluids
Aref Shokri -
Open Access Article
14 - Utility of Gold Nanoparticles for Spectrofluorimetric and Spectrophotometric Determination of Ceftobiprole in Dosage form and Biological Fluids
Hesham Salem Mahmoud Omar Dina Zein Deena MokhaterTwo simple, fast and novel delicate fluorimetric and spectrophotometric strategies were examined for the measure of ceftobiprole (CEF) utilizing gold nanoparticles (Au NPs). On spectrofluorimetric strategy, gold nanoparticles were utilized as a fluorescence test. The ex MoreTwo simple, fast and novel delicate fluorimetric and spectrophotometric strategies were examined for the measure of ceftobiprole (CEF) utilizing gold nanoparticles (Au NPs). On spectrofluorimetric strategy, gold nanoparticles were utilized as a fluorescence test. The expansion of CEF to Au-NPs arrangement caused significant quenching of the outflow band of Au-NPs, which was likely due to the complexation of the medicate to gold NPs. Beneath the ideal conditions, the extinguished fluorescence (FL) escalated was straight with the examined concentration. The extinguishing instrument of CEF on the outflow band of Au-NPs was clarified by Stern-Volmer law. The moment spectrophotometric strategy was based on conglomeration of synthesized gold nanoparticles. Gold nanoparticles appeared retention at 522 nm. Upon interaction with the CEF, the band at 522 nm vanished with arrangement of a unused ruddy moved band at 673. Distinctive exploratory variables were optimized for higher affectability. The calibration bands were straight with concentration extend of 0.1-12 µg/mL for the examined medicate. The methods were connected effectively to decide the studiedddrug in minor concentrations in immaculate frame, pharmaceutical measurement shapes and organic liquids (human serum and urine samples). Manuscript profile -
Open Access Article
15 - An investigation of carbon nanotubes on shear stress, thermal conductivity and the viscosity of Nanofluids
Aref Shokri -
Open Access Article
16 - Investigation of thermophysical properties and rheology of iron-silver-copper metal oxide hybrid nanoparticles based on carbon structure of quantum dots for use in heat transfer systems with turbulent flow regime
Hamid Mousavi , Seyed Mostafa Tabatabaee Ghomshe Alimorad rashidi Masoumeh MirzaeiIn this work, nano-hybrids of iron-carbon quantum dots, silver-carbon quantum dots, and copper– carbon quantum dots were synthesized and prepared by a wet chemical method. After examining their thermal and thermophysical properties, the thermal conductivity (k) wa MoreIn this work, nano-hybrids of iron-carbon quantum dots, silver-carbon quantum dots, and copper– carbon quantum dots were synthesized and prepared by a wet chemical method. After examining their thermal and thermophysical properties, the thermal conductivity (k) was measured and the heat transfer coefficient (h) for turbulent flow was compared. The synthesized samples were characterized with Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), tunneling electron microscopy (TEM), and scanning electron microscopy (SEM). Zeta, and dynamic light scattering (DLS) stability tests were also performed for the synthesized samples. The prepared carbon quantum dots and hybridized-iron, silver, and copper samples were distributed in the base fluid (water) by ultrasonic probe device. Viscosity and density were examined as a measure of nanoparticle concentration and temperature. Also, the heat capacity of synthesized nanoparticles was measured at different temperatures, but the changes in density and heat capacity at low concentrations of nanoparticles were not significant. Then the thermal conductivity (k) and the heat transfer coefficient (h) were measured to improve the heat transfer by the synthesized nanoparticles. The synthesized nanoparticles were prepared and analyzed for three different concentrations of 0.05, 0.1, and 0.5 wt. %. The greatest improvement in thermal conductivity 25 % at a concentration 0.5 wt. % and 45 °C was for hybridized copper nanoparticles-carbon quantum dots. Also, the highest improvement in heat transfer coefficient (h) was reported in Reynolds number 15529 for silver nanoparticles-carbon quantum dots improvement was about 29 %. In addition, copper nanoparticles-carbon quantum dots with a 20 % improvement in transfer heat transfer coefficient reported. Manuscript profile -
Open Access Article
17 - EMDH Flow of Carbon-Based Nanofluids over a Plane Sheet with Rotation and Soret Effect
Aetdene Wilson Rabiu Musah Kwara Nantomah Etwire Christian -
Open Access Article
18 - The Comparison of 24 and 48 Hours Culture on In vitro Maturation of Oocyte using Menstrual Blood Stem Cells Secretome in Polycystic Ovary
Hilda Rastegari نسیم حیاتی رودباری Somaieh Kazemnejad Soheila AnsaripourThe application of mesenchymal stem cells is a novel approach in regenerative medicine and infertility. Recently, culture enrichment using the secretome obtained from these cells, as well as the optimal time for culture, have been considered in order to improve the resu MoreThe application of mesenchymal stem cells is a novel approach in regenerative medicine and infertility. Recently, culture enrichment using the secretome obtained from these cells, as well as the optimal time for culture, have been considered in order to improve the results of in vitro maturation (IVM), especially in women with polycystic ovaries (PCOS). The purpose of this study is comparing 24 and 48 timing on IVM using secretome of menstrual blood stem cells (MenSCs) along with follicular fluid and melatonin in PCOS women. 400 germinal vesicle oocytes were collected from 100 PCOS patients, as the best candidates for IVM, and randomly divided into four groups: control, secretome, follicular fluid and melatonin. Oocyte maturation was evaluated at 24 and 48 hours. Also, the effect patient’s age on the results of the study was evaluated in the age groups under 30 and over 30 years old in both time periods. Oocyte maturation rate showed a significant increase in 24 hours in the group enriched with secretome compared to the control (p < 0.05). Also, matured oocytes were noticeably higher in melatonin enriched group, in 48 hours, compared to the control (p < 0.001). Moreover, according to our findings, the age of the women did not have a significant effect on the oocyte maturation rate in the 24-hour culture, while in the younger age group, the oocyte maturation rate increased significantly both in secretome and melatonin groups compared to the control group. As a result, the culture time of 24 hours with IVM medium enriched by secretome is the optimal time in order to increase oocyte maturation in PCOS women. Also, the use of melatonin seems to be an effective strategy to improve egg maturation in extended culture times. Manuscript profile -
Open Access Article
19 - Experimental investigation of the effects of temperature and nanoparticles volume fraction on the viscosity of Newtonian hybrid nanofluid
Ashkan Afshari Mohammad Eftekhari Yazdi -
Open Access Article
20 - تاثیر هندسه زبری دیواره نانوکانال در رفتار جریان پوازیه نانوسیال آب-مس
محمد میثم امراللهی پورشیرازی داود طغرایی احمدرضا عظیمیانرفتار جریان داخل نانوکانال­ها با توجه به گسترده شدن کاربردهای آنها در سیستم­های نوین از اهمیت زیادی برخوردار است. با توجه به نتایج بدست آمده در این تحقیق شرط عدم لغزش روی دیواره نانوکانال، شرط قابل قبولی نیست زیرا لغزش در این ابعاد به پارامترهای متفاوتی از جمله Moreرفتار جریان داخل نانوکانال­ها با توجه به گسترده شدن کاربردهای آنها در سیستم­های نوین از اهمیت زیادی برخوردار است. با توجه به نتایج بدست آمده در این تحقیق شرط عدم لغزش روی دیواره نانوکانال، شرط قابل قبولی نیست زیرا لغزش در این ابعاد به پارامترهای متفاوتی از جمله زبری سطح دارد. در این تحقیق با ثابت نگه داشتن مساحت جانبی زبری ، اثر تغییر شکل آن بر روی رفتار جریان سیال بررسی شده است. مدلسازی به کمک نرم­افزار متن باز لمس با روش شبیه­سازی دینامیک مولکولی تعادلی انجام شده است. برخلاف تحقیقات گذشته، از نانوسیال موجود در شرایط آزمایشگاهی مانند آب-مس استفاده شده است. نتایج بدست آمده نشان از بیشترین تاثیر گذاری زبری مستطیلی و کمترین تاثیر گذاری زبری مثلثی بر رفتار جریان دارد و در نتیجه لغزش در نانوکانال با زبری مثلثی با شدت بیشتری رخ می­دهد. وجود زبری روی سطح باعث افزایش تعداد نوسانات در لایه های سیال می­شود ولی دامنه نوسان در نزدیکی دیواره صاف نسبت به زبر افزایش یافته است. حضور نانوذرات نیز باعث افزایش این اثرگذاری بر خواص جریان می­شود. Manuscript profile
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