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Mechanistic simulation of fracture effects on miscible CO_(2)injection

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Petroleum Research 2022年第4期7卷 437-447页

作者： seyed Mohammad hossein hashemi Behnam Sedaee Institute of Petroleum Engineering School of Chemical EngineeringCollege of EngineeringUniversity of TehranIran

Miscible injection of carbon dioxide(CO_(2))into oil reservoirs as an Enhanced Oil Recovery(EOR)method has proved to be highly *** to the volume of the world's recoverable oil resides inside the fractured reservoirs,investigation of the controlling parameters in the efficient injection of miscible CO_(2) is of paramount importance,mainly owing to the intricacies and complexities associated with this *** complexity in fractured reservoirs arises due to the presence of two distinct media for fluid transfer(i.e.,matrix and fracture network)and the corresponding differences in fluid ***,performance of miscible carbon dioxide injection in these reservoirs was investigated through mechanistic simulation model in the form of dual-porosity(DP),and dual porosity-dual permeability(DPP).Moreover,due to limited supply and high injection costs of this gas in its pure form,performance of the miscible CO_(2) injection combined with C_(1),N_(2),and H_(2)S was also surveyed and compared to pure gas injection case.A sensitivity analysis was also performed based on fracture porosity,fracture horizontal and vertical permeability,matrix horizontal permeability,block height shape factor,matrix capillary pressure,and impure injected components in DP and DPP models,showing that matrix horizontal permeability and capillary pressure have the greatest,and porosity has the lowest impact on miscibility performance and oil recovery in these *** the end,after investigating the effect of different injection cases on miscibility performance and oil recovery,it was concluded that the highest oil recovery in miscible gas injection obtained through optimization of a gas composition having the lowest minimum miscibility pressure(MMP)and the lowest density.

关键词： Naturally fractured reservoir Carbon dioxide Miscibility Impurity Simulation

An advanced turbulator with blades and semi-conical section for heat transfer improvement in a helical double tube heat exchanger

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Journal of Central South University 2021年第11期28卷 3491-3506页

作者： seyed hossein hashemi KAROUEI seyed Soheil MOUSAVI AJAROSTAGHI Saman RASHIDI Elham hosseinIRAD Department of Mechanical Engineering Babol Noshirvani University of TechnologyBabolMazandaranIran Department of Energy Faculty of New Science and TechnologiesSemnan UniversitySemnanIran Department of Chemical Petroleumand Gas EngineeringSemnan UniversitySemnanIran

In present work,a helical double tube heat exchanger is proposed in which an advanced turbulator with blades,semi-conical part,and two holes is inserted in inner *** geometrical parameters,including angle of turbulator’s blades(θ) and number of turbulator’s blades(N),are *** indicated that firstly,the best thermal stratification is achieved at θ=180°.Furthermore,at the lowest studied mass flow rate(m = 8 × 10^(-3) kg/s),heat transfer coefficient of turbulator with blade angle of 180° is 130.77%,25%,and 36.36% higher than cases including without turbulator,with turbulator with blade angle of θ =240°,and θ =360°,***,case with N=12 showed the highest overall *** the highest studied mass flow rate(m = 5.842 × 10^(-2) kg/s),heat transfer coefficient for case with N=12 is up to 54.76%,27.45%,and 6.56% higher than cases including without turbulator,with turbulator with N=6,and with turbulator with N=9,respectively.

关键词： helical double tube heat exchanger turbulator blade thermal performance swirl flows

A comparative study on the anti-bacterial effect of Echinops persicus, Cardamine uliginosa and Vaccaria oxyodontha Boiss on Staphylococcus aureus and Escherichia coli bacteria in vitro

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TMR Integrative Medicine 2022年第6期6卷 1-7页

作者： Maryam Soori Bibi Zahra Nejad Ghaffar Sedighe Soleimani Rahele Bahrami seyed hossein hashemi hossein Abbaspour Hamid hashemi-Moghaddam Department of Biochemistry Hamedan BranchIslamic Azad UniversityHamedan 15743-65181Iran Department of Biochemistry Shoushtar BranchIslamic Azad UniversityShoushtar 14778-93855Iran Department of Biology Damghan BranchIslamic Azad UniversityDamghan ***Iran Department of nuclear engineering Olom Tahghighat branchIslamic Azad UniversityTehran ***Iran Department of Chemistry Damghan BranchIslamic Azad UniversityDamghan ***Iran.

Background:Medicinal herbs have always been closely associated with human beings,and no one deny their medicinal effects and *** are over 7,500 plant species in the rich flora of *** study,intends to investigate the anti-bacterial properties of three different plant species from Iranian flora,including Echinops persicus,Cardamine uliginosa,and Vaccaria oxyodontha *** and methods:This cross-sectional study was performed after confirmation and identification of collected *** plants were dried in the shade for *** the methanol extract of these plants was extracted by the classical extraction *** plants’antimicrobial effects of the plants were evaluated by agar disk diffusion,minimum inhibitory concentration,and minimum bactericidal *** mentioned plants’anti-bacterial activity was compared with the antibiotic discs of gentamicin(10 mg)and vancomycin(30 mg).SPSS software v20 was used for data analysis of Kruskal-Wallis and Dunn’s tests(P<0.05).Results:The lowest minimum inhibitory concentration obtained from the methanol extract of Cardamine uliginosa on standard strains of Staphylococcus aureus and Escherichia coli at 15.62 mg/mL for methanol extracts of Echinops persicus and Vaccaria oxyodontha Boiss on *** and *** at 31.25 mg/mL and 125 mg/mL,*** highest diameter of inhibition zone caused by methanol extract of Cardamine uiliginosa was against *** and *** with an inhibition zone of 23.9±0.29 mm and 20.4±0.43 mm,*** with the antibiotics gentamicin and vancomycin,the Cardamine uliginosa showed a stronger inhibitory effect(P<0.05).Conclusion:Echinops persicus,Cardamine uliginosa,and Vaccaria oxyodontha Boiss have anti-bacterial *** anti-bacterial property of Cardamine uilignosa is higher than the other two herbal medicine.

关键词： minimum inhibitory concentration Echinops persicus Cardamine uliginosa Vaccaria oxyodontha Boiss

Mechanistic simulation of fracture effects on miscible CO2 injection

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Petroleum Research 2022年第04期 437-447页

作者： seyed Mohammad hossein hashemi Behnam Sedaee Institute of Petroleum Engineering School of Chemical Engineering College of Engineering University of Tehran

Miscible injection of carbon dioxide（CO2） into oil reservoirs as an Enhanced Oil Recovery（EOR） method has proved to be highly advantageous. According to the volume of the world's recoverable oil resides inside the fractured reservoirs, investigation of the controlling parameters in the efficient injection of miscible CO2is of paramount importance, mainly owing to the intricacies and complexities associated with this process. This complexity in fractured reservoirs arises due to the presence of two distinct media for fluid transfer（i.e., matrix and fracture network） and the corresponding differences in fluid ***, performance of miscible carbon dioxide injection in these reservoirs was investigated through mechanistic simulation model in the form of dual-porosity（DP）, and dual porosity-dual permeability（DPP）. Moreover, due to limited supply and high injection costs of this gas in its pure form, performance of the miscible CO2injection combined with C1, N2, and H2S was also surveyed and compared to pure gas injection case. A sensitivity analysis was also performed based on fracture porosity,fracture horizontal and vertical permeability, matrix horizontal permeability, block height shape factor,matrix capillary pressure, and impure injected components in DP and DPP models, showing that matrix horizontal permeability and capillary pressure have the greatest, and porosity has the lowest impact on miscibility performance and oil recovery in these models. In the end, after investigating the effect of different injection cases on miscibility performance and oil recovery, it was concluded that the highest oil recovery in miscible gas injection obtained through optimization of a gas composition having the lowest minimum miscibility pressure（MMP） and the lowest density.

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APG: A novel python-based ArcGIS toolbox to generate absence-datasets for geospatial studies

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Geoscience Frontiers 2021年第6期12卷 90-104页

作者： seyed Amir Naghibi hossein hashemi Biswajeet Pradhan Department of Water Resources Engineering&Center for Advanced Middle Eastern Studies Lund UniversityLundSweden Centre for Advanced Modelling and Geospatial Information Systems(CAMGIS) Faculty of Engineering and Information TechnologyUniversity of Technology SydneyNew South WalesAustralia Department of Energy and Mineral Resources Engineering Sejong UniversityChoongmu-gwan209 Neungdong-ro Gwangjin-guSeoul 05006Republic of Korea Department of Meteorology King Abdulaziz UniversityP.O.Box 80234Jeddah 21589Saudi Arabia Earth Observation Centre Institute of Climate ChangeUniversiti Kebangsaan MalaysiaBangiSelangorMalaysia

One important step in binary modeling of environmental problems is the generation of absence-datasets that are traditionally generated by random sampling and can undermine the quality of *** solve this problem,this study develops the Absence Point Generation(APG)toolbox which is a Python-based ArcGIS toolbox for automated construction of absence-datasets for geospatial *** APG employs a frequency ratio analysis of four commonly used and important driving factors such as altitude,slope degree,topographic wetness index,and distance from rivers,and considers the presence locations buffer and density layers to define the low potential or susceptibility zones where absence-datasets are *** test the APG toolbox,we applied two benchmark algorithms of random forest(RF)and boosted regression trees(BRT)in a case study to investigate groundwater potential using three absence datasets i.e.,the APG,random,and selection of absence samples(SAS)*** BRT-APG and RF-APG had the area under receiver operating curve(AUC)values of 0.947 and 0.942,while BRT and RF had weaker performances with the SAS and Random *** effect resulted in AUC improvements for BRT and RF by 7.2,and 9.7%from the Random dataset,and AUC improvements for BRT and RF by 6.1,and 5.4%from the SAS dataset,*** APG also impacted the importance of the input factors and the pattern of the groundwater potential maps,which proves the importance of absence points in environmental binary *** proposed APG toolbox could be easily applied in other environmental hazards such as landslides,floods,and gully erosion,and land subsidence.

关键词： Absence-dataset Classification Python Machine learning algorithms GIS Groundwater Hydrogeology

Correlation of the mean activity coefficient of aqueous electrolyte solutions using an equation of state

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Chinese Journal of Chemical Engineering 2016年第10期24卷 1456-1463页

作者： seyed hossein Mazloumi Chemical Engineering Department Faculty of EngineeringFerdowsi University of Mashhad

Accurate calculation of thermodynamic properties of electrolyte solution is essential in the design and optimization of many processes in chemical industries. A new electrolyte equation of state is developed for aqueous electrolyte solutions. The Carnahan-Starling repulsive model and an attractive term based on square-well potential are adopted to represent the short range interaction of ionic and molecular species in the new electrolyte EOS. The long range interaction of ionic species is expressed by a simplified version of Mean Spherical Approximation theory （MSA）. The new equation of state also contains a Born term for charging free energy of ions. Three adjustable parameters of new eEOS per each electrolyte solution are size parameter, square-well potential depth and square-well potential interaction range. The new eEOS is applied for correlation of mean activity coefficient and prediction of osmotic coefficient of various strong aqueous electrolyte solutions at 25℃ and 0.1 MPa. In addition, the extension of the new eEOS for correlation of mean activity coefficient and solution density of a few aqueous electrolytes at temperature range of 0 to 100℃ is carried out.

关键词： Aqueous electrolyte solution Electrolyte equation of state Activity coefficient Osmotic coefficient Solution density

Effect of residual structural strain caused by the addition of Co3O4 nanoparticles on the structural, hardness and magnetic properties of an Al/Co3O4 nanocomposite produced by powder metallurgy

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International Journal of Minerals,Metallurgy and Materials 2020年第3期27卷 384-390页

作者： seyed Rahim Kiahosseini hossein Ahmadian Department of Engineering Damghan Branch Islamic Azad University

Al composites are of interest due to their appropriate ratio of strength to *** our research,an Al/Co3O4 nanocomposite was generated using a sintering *** powders of Al with various Co3O4 nanoparticle contents(0 wt%,0.5 wt%,1.0 wt%,1.5 wt%,2.0 wt%,and2.5 wt%)were first blended using planetary milling for 30 min,and compressed in a cylindrical steel mold with a diameter of 1 cm and a height of5 cm at a pressure of 80 *** samples were evaluated with X-ray diffractometry(XRD),scanning electron microscopy(SEM),Vickers hardness,and a vibrating sample magnetometer(VSM).Although the crystallite size of the Al particles remained constant at 7–10 nm,the accumulation of nanoparticles in the Al particle interspace increased the structural tensile strain from 0.0045 to 0.0063,the hardness from HV 28 to HV 52 and the magnetic saturation from 0.044 to 0.404 emu/g with an increase in Co3O4 nanoparticle content from 0 wt%to 2.5 wt%.

关键词： Residual strain Vickers hardness vibrating sample magnetometer scanning electron microscopy

Applications of SMILE-extracted lenticules in ophthalmology

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International Journal of Ophthalmology(English edition) 2024年第1期17卷 173-187页

作者： hossein Aghamollaei Hassan hashemi Mahsa Fallahtafti seyed-Hashem Daryabari Mehdi Khabazkhoob Khosrow Jadidi Chemical Injuries Research Center Systems Biology and Poisonings InstituteBaqiyatallah University of Medical SciencesTehran ***Iran Noor Research Center for Ophthalmic Epidemiology Noor Eye HospitalTehran ***Iran Vision Health Research Center Semnan University of Medical SciencesSemnan ***Iran Department of Basic Sciences School of Nursing and MidwiferyShahid Beheshti University of Medical SciencesTehran ***Iran

AIM:To review recent innovations,challenges,and applications of small incision lenticule extraction(SMILE)extracted lenticule for treating ocular ***:A literature review was performed in the PubMed database,which was last updated on 30 December *** was no limit regarding *** authors evaluated the reference lists of the collected papers to find any relevant ***:Due to the simplicity and accuracy of modern femtosecond lasers and the extensive development of SMILE surgery,many healthy human corneal stromal lenticules were extracted during surgery,motivating some professionals to investigate the SMILE lenticule reusability in different ocular *** addition,new approaches had been developed to preserve,modify,and bioengineer the corneal stroma,leading to the optimal use of discarded byproducts such as lenticules from SMILE *** lenticules can be effectively re-implanted into the autologous or allogenic corneas of human subjects to treat refractive errors,corneal ectasia,and corneal perforation and serve as a patch graft for glaucoma drainage devices with better cosmetic ***:SMILE-extracted lenticules could be a viable alternative to human donor corneal tissue.

关键词： small incision lenticule extraction corneal lenticule implantation keratoconus corneal perforation femtosecond laser stromal keratophakia

Enhanced microstructural and mechanical properties of Stellite/WC nanocomposite on Inconel 718 deposited through vibration-assisted laser cladding

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International Journal of Minerals,Metallurgy and Materials 2022年第2期29卷 327-334页

作者： hossein hosseini-Tayeb seyed Mahdi Rafiaei Daneshpajoohan Pishro Higher Education Institute IsfahanIran Department of Materials Science and Engineering Golpayegan University of TechnologyGolpayeganIsfahanIran

Stellite-21/WC nanopowders were deposited on Inconel through vibration-assisted laser cladding with different laser *** and scanning electron microscopy,hardness measurements,and wear characterizations were employed to understand the microstructural and mechanical behaviors of the *** showed that varying the cooling rate exerted remarkable effects on the microstructure of the as-cladded ***,increasing the laser power from 150 W to 250 W increased the heat input and the *** was affected by the scanning rate and powder feeding rate at a high laser power of 250 *** WC nanoparticles were added as reinforcement,the dilution magnitude intensified while the hardness value increased from HV 350 to HV *** wear characterizations indicated that the composites containing 3 wt%WC nanoparticles possessed the highest wear resistance.

关键词： Stellite WC nanoparticles mechanical properties laser cladding