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Effects of homogeneous-heterogeneous reactions and thermal radiation on magneto-hydrodynamic Cu-water nanofluid flow over an expanding flat plate with non-uniform heat source

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Journal of Central South University 2019年第5期26卷 1161-1171页

作者： DOGONCHI A S CHAmKHA Ali J hashemi-tilehnoee m SEYYEDI S m RIZWAN-UL-HAQ GANJI D D Department of mechanical Engineering Aliabad Katoul BranchIslamic Azad UniversityAliabad KatoulIran mechanical Engineering Department Prince Sultan Endowment for Energy and EnvironmentPrince Mohammad Bin Fahd UniversityAl-Khobar 31952Saudi Arabia RAK Research and Innovation Center American University of Ras Al KhaimahP.O.Box 10021Ras Al KhaimahUnited Arab Emirates Department of Electrical Engineering Bahria UniversityIslamabadPakistan mechanical Engineering Department Babol Noshirvani University of TechnologyBabolIran

This study presents the effect of non-uniform heat source on the magneto-hydrodynamic flow of nanofluid across an expanding plate with consideration of the homogeneous-heterogeneous reactions and thermal radiation effects.A nanofluid’s dynamic viscosity and effective thermal conductivity are specified with Corcione *** to this correlation,the thermal conductivity is carried out by the Brownian *** transformations reduce the governing equations concerned with energy,momentum,and concentration of nanofluid and then numerically *** influences of the effective parameters,e.g.,the internal heat source parameters,the volume fraction of nanofluid,the radiation parameter,the homogeneous reaction parameter,the magnetic parameter,the heterogeneous parameter and the Schmidt number are studied on the heat and flow transfer ***,regarding the effective parameters of the present work,the correlation for the Nusselt number has been *** outcomes illustrate that with the raising of the heterogeneous parameter and the homogeneous reaction parameter,the concentration profile *** addition,the outcomes point to a reverse relationship between the Nusselt number and the internal heat source parameters.

关键词： nanofluid non-uniform heat source homogeneous-heterogeneous reactions thermal radiation Brownian motion

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Utilizing an auxiliary portable lube oil heating system in Aliabad Katoul-Iran V94.2 gas turbine during standstill mode:a case study

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Propulsion and Power Research 2019年第4期8卷 320-328页

作者： H.Hasannejad Seyyed masoud Seyyedi m.hashemi-tilehnoee Department of mechanical Engineering Aliabad Katoul BranchIslamic Azad UniversityAliabad KatoulIran Young Researchers and Elite Club Aliabad Katoul BranchIslamic Azad UniversityAliabad KatoulIran

In a gas turbine power plant,the lubrication oil must be hot enough for the turbine start-up where the unit is in standstill ***,the strategy to heat the lubrication oil of ANSALDO V94.2 gas turbine power plant is operating the units in turning gear mode or interval ***,these strategies cause to suffering the power plant from high power consumption rate and *** this study,an auxiliary portable heating system was added to the unit 5 of the mAPNA built mGT-70(an Iranian version of V94.2)Aliabad Katoul-Iran power plant for increasing the lube oil ***,cost-effectiveness,and availability of the proposed heating system are studied by the concepts of exergy,economy,and reliability analyses,*** result of the exergy analysis shows that by using the auxiliary portable lube oil heating system the exergy destruction decreases about 94.7%and 92.6%in comparison with turning gear mode and interval mode,*** result of the economic analysis shows that the auxiliary portable heating system consumes less power rather than turning gear ***,it is a cost-effective system which has no penalty and no non-profit ***,the reliability analysis shows that the auxiliary portable lube oil heating system is a reliable tool during its lifetime.

关键词： Gas turbine Lube oil Lubrication system Portable heater Exergy Reliability

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Attuned design of demand response program and m-FACTS for relieving congestion in a restructured market environment

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Frontiers in Energy 2015年第3期9卷 282-296页

作者： Y. hashemi H. SHAYEGHI B. hashemi Technical Engineering Department University of Mohaghegh Ardabili Ardabil *** Iran Network Studies Group Bakhtar Regional Electric Company Arak *** Iran

This paper addresses the attuned use of multi- converter flexible alternative current transmission systems （m-FACTS） devices and demand response （DR） to perform congestion management （Cm） in the deregulated environment. The strong control capability of the m- FACTS offers a great potential in solving many of the problems facing electric utilities. Besides, DR is a novel procedure that can be an effective tool for reduction of congestion. A market clearing procedure is conducted based on maximizing social welfare （SW） and congestion as network constraint is paid by using concurrently the DR and m-FACTS. A multi-objective problem （mOP） based on the sum of the payments received by the generators for changing their output, the total payment received by DR participants to reduce their load and m-FACTS cost is systematized. For the solution of this problem a nonlinear time-varying evolution （NTVE） based multi-objective particle swarm optimization （mOPSO） style is formed. Fuzzy decision-making （FDm） and technique for order preference by similarity to ideal solution （TOPSIS） approaches are employed for finding the best compromise solution from the set of Pareto-solutions obtained through multi-objective particle swarm optimization-nonlinear time-varying evolution （mOPSO-NTVE）. In a real power system, Azarbaijan regional power system of Iran, comparative analysis of the results obtained from the application of the DR ＆ unified power flow controller （UPFC） and the DR ＆ m-FACTS are presented.

关键词： multi-converter flexible alternative currenttransmission systems (m-FACTS) demand response,

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Charged Higgs Pair Production in a General Two Higgs Doublet model at e^+e^- and μ^+μ^- Linear Colliders

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Communications in Theoretical Physics 2014年第1期61卷 69-74页

作者： m.hashemi Physics Department and Biruni Observatory College of SciencesShiraz University

In this paper, charged Higgs pair production through l^＋l^- → H^＋ H^-, where l = e or μ, is studied within the framework of a general Two Higgs Doublet model （2HDm）. The analysis is relevant to a future e^＋e^- or μ^＋ μ^- collider operating at center of mass energy of √s = 500 GeV. Two different scenarios of small and large a values are studied. Here a is the parameter, which diagonmizes the neutral CP-even Higgs boson mass matrix. Within the minimal Supersymmetric Standard model （mSSm）, cross section of this process is almost the same at e＋ e- and #＋#- colliders. It is shown that at e^＋e^- eolliders within a general 2HDm, cross section is not sensitive to the mass of neutral Higgs bosons, however, it can acquire large values up to several picobarn at μ^＋μ^- colliders with the presence of heavy neutral Higgs bosons. A scan over Higgs boson mass parameter space is performed to analyze the effect of large masses of neutral Higgs bosons involved in the s-channel propagator and thus in the total cross section of this process.

关键词： 2HDm Higgs bosons linear colliders

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A Comparison between Fossil and Nuclear Power Plants Pollutions and Their Environmental Effects

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Journal of Energy and Power Engineering 2011年第9期5卷 811-820页

作者： F. Javidkia m. hashemi-tilehnoee V. Zabihi Department of Nuclear Engineering Shiraz University Shiraz 71946-84471 Iran Department of Engineering Aliabad-Katul Branch Islamic Azad University Golestan 49417-93451Iran Department of Chemical Engineering Dezful Branch Islamic Azad University Dezful 64616-45169 Iran

New researches on serious public health problems such as respiratory disease, heart attacks, and premature deaths, show the threat of air and environmental pollution on human＇s health. Exhausting greenhouse gases for electrical energy production in fossil fueled power plants is one of the major reasons of environmental pollutions. Increasing energy demand has made global concerns about the environmental pollutions of fossil power plants. In this article, fossil power plant productive pollutants such as Sulfur Dioxide, mercury, and Carbon Dioxide, are investigated. On the other hand, nuclear power plant and its produced waste are discussed as the future power generation source. In this article, fossil and nuclear power plants are compared as power sources, pollutants, and their environmental effects. First, investigations are made on fossil power plants and their effects on environment and climate changes. On the other hand, nuclear power plants are discussed as a possible replacement for fossil power plants. In this part, effects of radiation on human health and environment like important nuclear accidents are investigated. This paper summarizes several types of power plants and it is deduced that the nuclear power plant is more clean energy producer in comparison to other power plants.

关键词： Nuclear power plant fossil power plant environmental pollutions green energy.

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Severe plastic deformation (SPD) of biodegradable magnesium alloys and composites: A review of developments and prospects

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Journal of magnesium and Alloys 2022年第4期10卷 938-955页

作者： m.Kasaeian-Naeini m.Sedighi R.hashemi School of mechanical Engineering Iran University of Science and TechnologyTehranIran

The use of magnesium in orthopedic and cardiovascular applications has been widely attracted by diminishing the risk of abnormal interaction of the implant with the body tissue and eliminating the second surgery to remove it from the ***,the fast degradation rate and generally inhomogeneous corrosion subsequently caused a decline in the mechanical strength of mg during the healing *** researches have been conducted on the influences of various severe plastic deformation(SPD)processes on magnesium bioalloys and *** paper strives to summarize the various SPD techniques used to achieve magnesium with an ultrafine-grained(UFG)***,the effects of various severe plastic deformation methods on magnesium microstructure,mechanical properties,and corrosion behavior have been ***,this review intends to clarify the different potentials of applying SPD processes to the magnesium alloys and composites to augment their usage in biomedical applications.

关键词： magnesium Severe plastic deformation Biodegradable implant mechanical properties Corrosion

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On the Time Fractional Generalized Fisher Equation：Group Similarities and Analytical Solutions

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Communications in Theoretical Physics 2016年第1期65卷 11-16页

作者： m.S.hashemi D.Baleanu Department of mathematics Basic Science Faculty University of Bonab P.O. Box 55517-61167 Bonab Iran Department of mathematics Cankaya University Ogretmenler Caddesi 14 Balgat 06530 Ankara Turkey Institute of Space Sciences Magurele-Bucharest Romania

In this letter,the Lie point symmetries of the time fractional Fisher(TFF) equation have been derived using a systematic *** the obtained Lie point symmetries,TFF equation has been transformed into a different nonlinear fractional ordinary differential equations with the Erd′elyi–Kober fractional derivative which depends on the parameter α.After that some invariant solutions of underlying equation are reported.

关键词： Erdelyi -Kober derivative time fractional Fisher equation Lie point symmetry

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Design of hybrid damping controller based on multi-target gravitational search optimization algorithm in a multi-machine power system with high penetration of PV park

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Journal of Central South University 2016年第5期23卷 1163-1175页

作者： Y.hashemi H.Shayeghi m.moradzadeh A.Safari Technical Engineering Department University of Mohaghegh Ardabili Centre of Excellence for Power System Automation and Operation Department of Electrical EngineeringIran University of Science and Technology Centre for Engineering Innovation Department of Electrical and Computer EngineeringUniversity of Windsor Electrical Energy Laboratory Department of Electrical EnergySystems and AutomationGhent University Department of Electrical Engineering Azarbaijan Shahid Madani University

A mathematical approach was proposed to investigate the impact of high penetration of large-scale photovoltaic park(LPP) on small-signal stability of a power network and design of hybrid controller for these units.A systematic procedure was performed to obtain the complete model of a multi-machine power network including *** damping of oscillations focusing on inter-area oscillatory modes,a hybrid controller for LPP was *** performance of the suggested controller was tested using a 16-machine 5-area *** results indicate that the proposed hybrid controller for LPP provides sufficient damping to the low-frequency modes of power system for a wide range of operating *** method presented in this work effectively indentifies the impact of increased PV penetration and its controller on dynamic performance of multi-machine power network containing *** results demonstrate that the model presented can be used in designing of essential controllers for LPP.

关键词： hybrid controller multi-objective optimization large-scale photovoltaic park small-signal scrutiny

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Evaluation of integration methods for hybrid simulation of complex structural systems through collapse

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Earthquake Engineering and Engineering Vibration 2017年第4期16卷 745-759页

作者： maikol Del Carpio R. m.Javad hashemi Gilberto mosqueda KPFF Consulting Engineers Los AngelesCA 90045USA Faculty of Science Engineering and TechnologySwinburne University of TechnologyMelbourneVIC 3122Australia Department of Structural Engineering University of CaliforniaSan DiegoCA 92093USA

This study examines the performance of integration methods for hybrid simulation of large and complex structural systems in the context of structural collapse due to seismic excitations. The target application is not necessarily for real-time testing, but rather for models that involve large-scale physical sub-structures and highly nonlinear numerical models. Four case studies are presented and discussed. In the first case study, the accuracy of integration schemes including two widely used methods, namely, modified version of the implicit Newmark with fixed-number of iteration （iterative） and the operator-splitting （non-iterative） is examined through pure numerical simulations. The second case study presents the results of 10 hybrid simulations repeated with the two aforementioned integration methods considering various time steps and fixed-number of iterations for the iterative integration method. The physical sub-structure in these tests consists of a single-degree-of-freedom （SDOF） cantilever column with replaceable steel coupons that provides repeatable highly- nonlinear behavior including fracture-type strength and stiffness degradations. In case study three, the implicit Newmark with fixed-number of iterations is applied for hybrid simulations of a 1：2 scale steel moment frame that includes a relatively complex nonlinear numerical substructure. Lastly, a more complex numerical substructure is considered by constructing a nonlinear computational model of a moment frame coupled to a hybrid model ofa 1：2 scale steel gravity frame. The last two case studies are conducted on the same porotype structure and the selection of time steps and fixed number of iterations are closely examined in pre-test simulations. The generated unbalance forces is used as an index to track the equilibrium error and predict the accuracy and stability of the simulations.

关键词： Hybrid simulation collapse integration methods unbalance forces stability and accuracy numerical errors

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Invariant G^(2)V algorithm for computing SAGBI-Grobner bases

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Science China mathematics 2013年第9期56卷 1781-1794页

作者： hashemi Amir m.-ALIZADEH Benyamin RIAHI monireh Department of mathematical Sciences Isfahan University of Technology Young Researchers Club Science and Research BranchIslamic Azad University Department of mathematics Damghan University

Faugère and Rahmany have presented the invariant F5 algorithm to compute SAGBI-Grbner bases of ideals of invariant rings. This algorithm has an incremental structure, and it is based on the matrix version of F5 algorithm to use F5 criterion to remove a part of useless reductions. Although this algorithm is more efficient than the Buchberger-like algorithm, however it does not use all the existing criteria (for an incremental structure) to detect superfluous reductions. In this paper, we consider a new algorithm, namely, invariant G2V algorithm, to compute SAGBI-Grbner bases of ideals of invariant rings using more criteria. This algorithm has a new structure and it is based on the G2V algorithm; a variant of the F5 algorithm to compute Grbner bases. We have implemented our new algorithm in maple , and we give experimental comparison, via some examples, of performance of this algorithm with the invariant F5 algorithm.

关键词： G^(2)V algorithm invariant F5 algorithm invariant G^(2)V algorithm SAGBI-Grobner bases

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