scholarly journals Analyzing the Performance of Wave-Energy Generator Systems (SSG) for the Southern Coasts of Iran, in the Persian Gulf and Oman Sea

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3209 ◽  
Author(s):  
Kamran Khalifehei ◽  
Gholamreza Azizyan ◽  
Carlo Gualtieri
Keyword(s):  
Wave Energy ◽  
Persian Gulf ◽  
Numerical Study ◽  
Fluid Dynamic ◽  
Sea Waves ◽  
The Real ◽  
Oman Sea ◽  
Wave Heights ◽  
Wave Conditions ◽  
The Persian Gulf

The Sea-wave Slot-cone Generator (SSG) wave-energy device is a type of electric energy converting structure that converts energy from sea waves, and which is designed and installed based on wave-overtopping in areas. Most of the previous studies have evaluated SSG systems based on hypothetical waves, considering the system geometry variations. However, it is important to consider the real wave conditions. This paper presents the results of a numerical study to investigate the performances of an SSG system in the context of the Persian Gulf and Oman Sea, where there is a strong need for renewable energies. The computational fluid dynamic (CFD) code Flow-3D was applied. First of all, available experimental data were applied to calibrate and evaluate the accuracy of the numerical model. Then, the real wave conditions on the coasts of the Persian Gulf and Oman Sea were imposed on the JONSWAP spectrum for the numerical modeling. Results of the study demonstrated that the hydraulic efficiency of the SSG system in the Persian Gulf and Oman Sea was low for wave heights lower than 0.5 m. The nominal efficiency of the system was relatively more than 60% for wave heights higher than 1 m; thus, the performance of the SSG system was suitably evaluated. Finally, the numerical results demonstrated that the most optimal conditions, with a nominal efficiency of 97%, were obtained for incident waves that had a height of 2 m and a period of 5.6 s. In this case, the hydraulic performance of the system was maximum.

scholarly journals The circulation of the Persian Gulf: a numerical study

2005 ◽  
Vol 2 (3) ◽  
pp. 129-164 ◽  
Author(s):  
J. Kämpf ◽  
M. Sadrinasab
Keyword(s):  
United Arab Emirates ◽  
Persian Gulf ◽  
Thermal Stratification ◽  
Numerical Study ◽  
Three Dimensional ◽  
Detailed Comparison ◽  
Mass Properties ◽  
Inverse Estuary ◽  
The Persian Gulf ◽  
Autumn And Winter

Abstract. We employ a three-dimensional hydrodynamic model (COHERENS) to study the circulation and water mass properties of the Persian Gulf, which is a large inverse estuary. Our findings suggest that the Persian Gulf experiences a distinct seasonal cycle in which a Gulf-wide cyclonic overturning circulation establishes in spring and summer, but this disintegrates into mesoscale eddies in autumn and winter. Establishment of the Gulf-wide circulation coincides with establishment of thermal stratification and strengthening of the baroclinic exchange circulation through the Strait of Hormuz. The latter is associated with winter cooling of extreme saline (>45 psu) water in shallow regions along the coast of United Arab Emirates. To validate the model results, we present a detailed comparison with observational evidence.

scholarly journals The structure of the Persian Gulf outflow subjected to density variations

2008 ◽  
Vol 5 (2) ◽  
pp. 135-161 ◽  
Author(s):  
A. A. Bidokhti ◽  
M. Ezam
Keyword(s):  
Mass Transport ◽  
Persian Gulf ◽  
Anthropogenic Factors ◽  
Oman Sea ◽  
The Earth ◽  
Salinity Increase ◽  
Persian Gulf Water ◽  
Oceanographic Data ◽  
The Persian Gulf ◽  
Simple Dynamical Model

Abstract. Oceanographic data and a dynamic model are used to consider the structure of Persian Gulf outflow. This outflow influences the physical properties of Oman seawater which appear in the CTD profiles of the Oman Sea. The observations show that thickness of the outflow, which is banked against the Oman coasts due to the earth rotation, is about 200 m with tongues extending east and north that may be due to the internal waves. A simple dynamical model of the outflow based on potential vorticity conservation is used to find the horizontal extension of the outflow from the coast. Typical mass transport estimate by the outflow is about 0.4 Sv, which is larger than those reported by others. This may be due to the fact the model is inviscid but the outflow is influenced by the bottom friction. Variability of the outflow structure may reflect the changing ecosystem of the Persian Gulf. Any change of the outflow source, the Persian Gulf Water (PGW), say salinity increase due to excessive evaporation (climate factor) or desalination (anthropogenic factors) of the PGW may change the outflow structure and the product waters in the Oman Sea. Hence, one can test different scenarios of changing the outflow source, the Persian Gulf Water (PGW), say by salinity increase due to excessive evaporation or desalination (ecosystem factors) of the PGW to estimate changes in the outflow structure and the product waters in the Oman Sea. The results of the model show that these can increase the outflow width and mass transport substantially.

Morphometric and genetic characterizations of blue swimming crab Portunus segnis, (Forskal, 1775) along the Iranian coasts of the Persian Gulf and Oman Sea

2020 ◽  
Vol 34 ◽  
pp. 101091
Author(s):  
Dara Bagheri ◽  
Ahmad Farhadi ◽  
Afshar Bargahi ◽  
Iraj Nabipour ◽  
Seyyedeh Roya Alavi Sharif ◽  
...  
Keyword(s):  
Persian Gulf ◽  
Swimming Crab ◽  
Oman Sea ◽  
The Persian Gulf ◽  
Portunus Segnis

Morphological identification and molecular validation of anchovies (Engraulidae) in the Persian Gulf and Oman Sea

Zootaxa ◽  
2020 ◽  
Vol 4742 (2) ◽  
pp. 375-391
Author(s):  
MAHBOOBEH AFRAND ◽  
IMAN SOURINEJAD ◽  
SEYED ABOLHASSAN SHAHZADEH FAZELI ◽  
ARASH AKBARZADEH ◽  
LALEH PARSA YEGANEH ◽  
...  
Keyword(s):  
Persian Gulf ◽  
Morphological Characteristics ◽  
Morphological Differentiation ◽  
Genetic Distances ◽  
Morphological Identification ◽  
Mitochondrial Cytochrome Oxidase Subunit ◽  
Closely Related Species ◽  
Oman Sea ◽  
The Persian Gulf ◽  
Mitochondrial Cytochrome Oxidase

Validation of species using independent lines of evidence is sometimes desirable when their identification using only one approach is difficult or questionable. The identification of anchovies (Engraulidae) are often challenging based on morphology because closely related species exhibit only slight morphological differentiation. This study utilized morphological characteristics and DNA barcodes for identification and validation of anchovies in the Persian Gulf and Oman Sea. Based on morphology, we identified eight species: Thryssa hamiltonii, T. setirostris, T. vitrirostris, T. whiteheadi, T. dussumieri, Encrasicholina punctifer, E. pseudoheteroloba and Stolephorus indicus. A 658 bp region of mitochondrial cytochrome oxidase subunit I (COI) was generated for 53 specimens from these eight species. From these sequences, we built a Maximum Likelihood phylogenetic tree. In this tree, each species forms a monophyletic group confirming our initial morphological identification. In addition, we provided (and registered in GenBank) the first barcode sequences for T. whiteheadi, an endemic species of this region. Interspecies genetic distances were comprised between 0.168 to 0.275. The largest genetic distance was found between T. vitrirostris and S. indicus and the smallest between T. dussumieri and T. whiteheadi. This study successfully identified eight species of anchovies in the Persian Gulf and Oman Sea based on both morphological and molecular characters. 

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