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    Numerical Simulation and Investigation of Impact of Climate Change on Probability Occurrence of Tropical Cyclone in Sea of Oman and Persian Gulf

    , M.Sc. Thesis Sharif University of Technology Ilami, Dariush (Author) ; Abbaspour Tehrani Fard, Madjid (Supervisor)
    Abstract
    Super cyclone GONU formed on June 2007 has been recognized the strongest tropical cyclone in the North Indian Ocean (NIO). The aim of this study is to numerically simulate the cyclone GONU and its resulting waves in the southern seas of Iran leading to the best parametric model to simulate future occurrence of tropical cyclones (TCs) in the NIO. In this regard, the best track data of the cyclone is extracted from Indian Meteorological Department (IMD). The cyclone GONU wind field is simulated by Young and Sobey, Holland, and Rankin models in order to determine the most appropriate model which is then considered for regenerating cyclonic wind fields over the Makran coastline and the sea of... 

    Seasonal and interannual cycles of total phytoplankton phenology metrics in the Persian Gulf using ocean color remote sensing

    , Article Continental Shelf Research ; Volume 237 , 2022 ; 02784343 (ISSN) Zoljoodi, M ; Moradi, M ; Moradi, N ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    Spatial and temporal patterns of climatological seasonality, interannual variability, and phytoplankton phenology were estimated using satellite-derived ocean color chlorophyll-a data (Chl-a) 1998 to 2020 in the Persian Gulf from. Biogeography of phytoplankton seasonal and interannual climatology was determined using k-means multivariate clustering analysis applied on the Chl-a time-series data. As a result, two distinct regions were identified: one in the deep north and middle area (DZC) with a minimum value of Chl-a in April–July (0.62–0.76 mg m−3) and maximum in December–February (1.07–1.59 mg m−3), and the other in the north–west coastal areas and along the southwest-southern area (SZC)... 

    Production of drinking water from seawater using membrane distillation (MD) alternative: Direct contact MD and sweeping gas MD approaches

    , Article Desalination and Water Treatment ; Vol. 52, issue. 13-15 , Apr , 2014 , p. 2372-2381 Shirazi, M. M. A ; Kargari, A ; Bastani, D ; Fatehi, L ; Sharif University of Technology
    Abstract
    In this work, two-membrane distillation (MD) modes, direct contact MD, and sweeping gas MD were investigated for synthesized and real (Persian Gulf) seawater desalination. A commercial PTFE membrane with 0.22 μm pore size was characterized (using atomic force microscopy and scanning electron microscopy) and was used for experiments. A multipurpose plate and frame MD module was used for desalination experiments. The effects of various operating conditions and MD module design, as well as feed type on the permeation flux have been studied. The feed temperature was found to be the most effective operating parameter. The flow rate in both sides of the MD module was found to be effective;... 

    Utilization of percolation approach to evaluate reservoir connectivity and effective permeability: A case study on North Pars gas field

    , Article Scientia Iranica ; Vol. 18, issue. 6 , December , 2011 , p. 1391-1396 ; ISSN: 10263098 Sadeghnejad, S ; Masihi, M ; Pishvaie, M ; Shojaei, A ; King, P. R ; Sharif University of Technology
    Abstract
    Reservoir characterization, especially during early stages of reservoir life, is very uncertain, due to the scarcity of data. Reservoir connectivity and permeability evaluation is of great importance in reservoir characterization. The conventional approach to addressing this is computationally very expensive and time consuming. Therefore, there is a great incentive to produce much simpler alternative methods. In this paper, we use a statistical approach called the percolation theory, which considers a hypothesis wherein the reservoir can be split into either permeable (i.e. sand/fracture) or impermeable flow units (i.e. shale/matrix), and assumes that the connectivity of permeability... 

    Utilization of percolation approach to evaluate reservoir connectivity and effective permeability: A case study on North Pars gas field

    , Article Scientia Iranica ; Volume 18, Issue 6 , December , 2011 , Pages 1391-1396 ; 10263098 (ISSN) Sadeghnejad, S ; Masihi, M ; Pishvaie, M ; Shojaei, A ; King, P. R ; Sharif University of Technology
    2011
    Abstract
    Reservoir characterization, especially during early stages of reservoir life, is very uncertain, due to the scarcity of data. Reservoir connectivity and permeability evaluation is of great importance in reservoir characterization. The conventional approach to addressing this is computationally very expensive and time consuming. Therefore, there is a great incentive to produce much simpler alternative methods. In this paper, we use a statistical approach called the percolation theory, which considers a hypothesis wherein the reservoir can be split into either permeable (i.e. sand/fracture) or impermeable flow units (i.e. shale/matrix), and assumes that the connectivity of permeability... 

    An industrial application of low-grade sensible waste heat driven seawater desalination: a case study

    , Article Desalination ; Volume 470 , 2019 ; 00119164 (ISSN) Rahimi, B ; Marvi, Z ; Alamolhoda, A. A ; Abbaspour, M ; Chua, H. T ; Sharif University of Technology
    Elsevier B.V  2019
    Abstract
    This paper reports on the application of low-grade sensible waste heat (liquid phase) driven multi-effect distillation (MED) technology to exploit waste heat sources that are generally abundant in the petrochemical industries especially, those located close to the Persian Gulf's coastline. For this purpose, a techno-economic feasibility study by considering local capital and operating costs for a selected petrochemical plant has been conducted. In this study, a sensible waste heat stream (practically at 80 °C in the liquid phase), which is actively cooled by the cooling process of the plant, is considered as the heat source for the proposed desalination process. This process can recover... 

    A feasibility study of solar-powered reverse osmosis processes

    , Article Desalination ; Volume 500 , 2021 ; 00119164 (ISSN) Rahimi, B ; Shirvani, H ; Alamolhoda, A. A ; Farhadi, F ; Karimi, M ; Sharif University of Technology
    Elsevier B.V  2021
    Abstract
    The use of solar-powered reverse osmosis desalination systems is a sustainable and environmentally friendly solution in the desalination industry. However, there are some substantial technical and economic challenges due to the intermittency and fluctuation of solar energy. Recent technological improvement and feed-in tariff policies enable these systems to be competitive with conventional grid-connected reverse osmosis systems. In this paper, a feasibility study of the integration of solar panels with the grid to power small-scale reverse osmosis systems (namely up to 2000 m3/day) is conducted in Iran, as a country with a low price of electricity. For this purpose, a city located on the... 

    Integrated coastal management plan in free trade zones, a case study

    , Article Ocean and Coastal Management ; Volume 54, Issue 2 , February , 2011 , Pages 129-136 ; 09645691 (ISSN) Pak, A ; Majd, F ; Sharif University of Technology
    2011
    Abstract
    Free Trade Zones (FTZs) around the world offer special advantages to investors and facilitate import/export of goods in order to boost the regional economy. Integrated coastal management in these areas faces special challenges in addition to what ordinary ICZMs usually encounter. For a successful ICZM plan, the very strong business orientation in FTZs has to be taken into account, while other important aspects such as environmental, social, and cultural issues should not be overlooked. The problem becomes more difficult where the free zone is situated in sensitive and valuable environmental circumstances.Kish Island, a free trade zone in the Persian Gulf region, has recently been the focus... 

    Iran's integrated coastal management plan: persian gulf, oman sea, and southern caspian sea coastlines

    , Article Ocean and Coastal Management ; Volume 50, Issue 9 , 2007 , Pages 754-773 ; 09645691 (ISSN) Pak, A ; Farajzadeh, M ; Sharif University of Technology
    2007
    Abstract
    Iran, having two separate coastlines at its north and south of about 3000 km length, with very different characteristics, suffers from various coastal problems. While its northern coastal area is over-populated and its sensitive and unique habitats must be protected from destruction, most of its southern coastal areas are undeveloped and deserted. Intense oil and gas exploitation activities in the Caspian Sea region and occurrence of two wars in the Persian Gulf during the last two decades have rendered hydrocarbon pollution a major issue for this country's marine and coastal environment. Biodiversity is under threat in some areas and natural resources are deteriorating. To overcome the... 

    Correlation between concentrations of chlorophyll-a and satellite derived climatic factors in the Persian Gulf

    , Article Marine Pollution Bulletin ; Volume 161, Part A , December , 2020 Moradi, M ; Moradi, N ; Sharif University of Technology
    Elsevier Ltd  2020
    Abstract
    Monthly mean satellite derived Chl-a, aerosols, wind, SST, PAR, and turbidity datasets were used to investigate the possible factors regulating phytoplankton variability in the Persian Gulf. The spatial correlation analysis revealed two distinct regions of SST and PAR, and a relatively uniform spatial correlation pattern of the other parameters. The cross correlation between aeolian dusts and Chl-a was significantly positive with 1–3 months offset. The pattern of spatial correlation between Chl-a and SST was positive in the shallow regions without time lag, and was negative with time offset of 3–5 months in deeper regions. The cross correlation between Chl-a and north-ward winds were... 

    A new multi-sample EOS model for the gas condensate phase behavior analysis

    , Article Oil and Gas Science and Technology ; Volume 66, Issue 6 , September , 2011 , Pages 1025-1033 ; 12944475 (ISSN) Mehrabian, A ; Crespo, F ; Sharif University of Technology
    2011
    Abstract
    Equations of State EOS are vastly being used to predict the phase behavior of reservoir fluids. The accuracy of EOS modeling technique over conventional correlation models would benefit an improved property prediction of these fluids. Once the crude oil or gas condensate fluid system has been probably characterized using limited laboratory tests, its PVT behavior under a variety of conditions can be easily studied. In this paper, the PVT behavior of gas condensate from a reservoir in South Pars retrograde gas field in Iran was modeled using the three-parameter Patel and Teja Equation of State. The multi-sample characterization method is used to arrive at one consistent model for retrograde... 

    Conceptualization of a fresh groundwater lens influenced by climate change: A modeling study of an arid-region island in the Persian Gulf, Iran

    , Article Journal of Hydrology ; Vol. 519, issue. PA , 2014 , pp. 399-413 ; ISSN: 00221694 Mahmoodzadeh, D ; Ketabchi, H ; Ataie-Ashtiani, B ; Simmons, C. T ; Sharif University of Technology
    Abstract
    Understanding the fresh groundwater lens (FGL) behavior and potential threat of climatic-induced seawater intrusion (SWI) are significant for the future water resources management of many small islands. In this paper, the FGL of Kish Island, an arid-region case in the Persian Gulf, Iran, is modeled using two-dimensional (2D) and three-dimensional (3D) simulations. These simulations are based on the application of SUTRA, a density-dependent groundwater numerical model. Also, the numerical model parameters are calibrated using PEST, an automated parameter estimation code. Firstly a detailed conceptualization of the FGL model is completed to understand the sensitivity of the FGL to some... 

    Effects of salinity, ion type, and aging time on the crude oil-brine interfacial properties under gravity condition

    , Article Journal of Petroleum Science and Engineering ; Volume 195 , December , 2020 Khajepour, H ; Akhlaghi Amiri, H. A ; Ayatollahi, S ; Sharif University of Technology
    Elsevier B.V  2020
    Abstract
    In this study, the impacts of salinity, ion type, and aging process were investigated on coalescence and spreading of crude oil interfaces (including an oil droplet and an oil film) under gravity, through drop rest time measurement techniques, aided by an image analysis system. Three different salt solutions of NaCl, Na2SO4, and MgCl2 were studied at different ionic strengths, ranged from 1% to 150% of Persian Gulf seawater ionic strength. According to the results, aging the oil droplet in the brine increased the interfacial rigidity. Addition of a gas phase - by thinning the surface oil film - almost doubled both rest time and spreading time values. In the aged mode, the presence of salt in... 

    Assessment of a parallel evolutionary optimization approach for efficient management of coastal aquifers

    , Article Environmental Modelling and Software ; Volume 74 , December , 2015 , Pages 21-38 ; 13648152 (ISSN) Ketabchi, H ; Ataie Ashtiani, B ; Sharif University of Technology
    Elsevier Ltd  2015
    Abstract
    This study presents a parallel evolutionary optimization approach to determine optimal management strategies of large-scale coastal groundwater problems. The population loops of evolutionary algorithms (EA) are parallelized using shared memory parallelism to address the high computational demands of such applications. This methodology is applied to solve the management problems in an aquifer system in Kish Island, Iran using a three-dimensional density-dependent groundwater numerical model. EAs of continuous ant colony optimization (CACO), particle swarm optimization, and genetic algorithm are utilized to solve the optimization problems. By implementing the parallelization strategy, a... 

    Lithological facies identification in Iranian largest gas field: A comparative study of neural network methods

    , Article Journal of the Geological Society of India ; Vol. 84, issue. 3 , Sep , 2014 , p. 326-334 ; ISSN: 00167622 Kakouei, A ; Masihi, M ; Sola, B. S ; Biniaz, E ; Sharif University of Technology
    Abstract
    Determination of different facies in an underground reservoir with the aid of various applicable neural network methods can improve the reservoir modeling. Accordingly facies identification from well logs and cores data information is considered as the most prominent recent tasks of geological engineering. The aim of this study is to analyze and compare the five artificial neural networks (ANN) approaches with identification of various structures in a rock facies and evaluate their capability in contrast to the labor intensive conventional method. The selected networks considered are Backpropagation Neural Networks (BPNN), Radial Basis Function (RBF), Probabilistic Neural Networks (PNN),... 

    Lithological facies identification in Iranian largest gas field: A comparative study of neural network methods

    , Article Journal of the Geological Society of India ; Vol. 84, issue. 3 , September , 2014 , PP. 326-334 ; ISSN: 00167622 Kakouei, A ; Masihi, M ; Sola, B. S ; Biniaz, E ; Sharif University of Technology
    Abstract
    Determination of different facies in an underground reservoir with the aid of various applicable neural network methods can improve the reservoir modeling. Accordingly facies identification from well logs and cores data information is considered as the most prominent recent tasks of geological engineering. The aim of this study is to analyze and compare the five artificial neural networks (ANN) approaches with identification of various structures in a rock facies and evaluate their capability in contrast to the labor intensive conventional method. The selected networks considered are Backpropagation Neural Networks (BPNN), Radial Basis Function (RBF), Probabilistic Neural Networks (PNN),... 

    New hybrid multi criteria decision making method for offshore windfarm site location in Persian Gulf, Iran

    , Article Ocean Engineering ; Volume 256 , 2022 ; 00298018 (ISSN) Hosseini Dehshiri, S. S ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    Choosing the right location for the sustainable development of offshore wind energy plays an important role in the success of renewable projects. In this regard, in the present study, a new application of the hybrid Fuzzy-SWARA & Fuzzy-WASPAS method was presented to prioritize the suitable area for developing offshore wind projects. For a case study, five regions with high potential for offshore wind energy in the Persian-Gulf have been investigated. Economic assessment was evaluated using the Levelized Cost of energy method. Evaluation of offshore wind farms has been analyzed from various aspects including technical, economic, social, environmental and risk. The SWARA was used for weighting... 

    Inverse vibration technique for structural health monitoring of offshore jacket platforms

    , Article Applied Ocean Research ; Volume 62 , 2017 , Pages 181-198 ; 01411187 (ISSN) Haeri, M. H ; Lotfi, A ; Dolatshahi, K. M ; Golafshani, A. A ; Sharif University of Technology
    Elsevier Ltd  2017
    Abstract
    In this paper a new approach is introduced for structural health monitoring of offshore jacket platforms. The procedure uses the measured ambient vibration responses and the corresponding readable natural frequencies and mode shapes of the structural system. Since offshore platforms are composed of heavy topsides supported by jacket structures, participation of the first mode is dominant in each direction in the response of the structure under field excitations. Moreover, ambient vibrations such as wave loads and boat impacts only excite the first modes of the structure. Therefore, it is difficult to find higher modes and the pertinent frequencies by use of accelerometers data. The... 

    Magnetic, thermally stable, and superhydrophobic polyurethane sponge: A high efficient adsorbent for separation of the marine oil spill pollution

    , Article Chemosphere ; Volume 287 , 2022 ; 00456535 (ISSN) Habibi, N ; Pourjavadi, A ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    Herein, we demonstrated a facile method for the fabrication of magnetic and superhydrophobic polyurethane sponge with water contact angle of 159° as an adsorbent for cleanup the marine oil spill pollution. For this aim, a polyurethane sponge was coated with carbon black (CB), hexagonal boron nitride (h-BN)@Fe3O4, and acrylic resin and then characterized by different techniques. Owing to the chemical and thermal stability of h-BN and CB, the modified sponge was stable under corrosive conditions (pH = 1–14 and salt solutions) and at different temperatures (−12 °C–105 °C). In addition to common oils and organic solvents, we also used the real spilled oils containing monoaromatics and... 

    The exact and approximate conditional spectra in the multi-seismic-sources regions

    , Article Soil Dynamics and Earthquake Engineering ; Volume 39 , August , 2012 , Pages 61-77 ; 02677261 (ISSN) Ebrahimian, H ; Azarbakht, A ; Tabandeh, A ; Akbar Golafshani, A ; Sharif University of Technology
    Elsevier  2012
    Abstract
    The exact and two approximate conditional spectra are compared in this manuscript as a target spectrum for the purpose of ground motion selection. The considered site is a real offshore site located at South Pars Gas Field in the Persian Gulf region. This case study site is influenced by four major seismic area sources in which the deaggregation results confirm that many comparable seismic scenarios can be taken into account. Therefore, an alternative to the conventional approximate conditional spectrum is proposed that has a small deviation from the exact solution. In addition, the use of different conditioning status of the probabilistic seismic hazard deaggregation (i.e., occurrence...