Performance Assessment of Shirin Earth Dam in Iraq Under Various Operational Conditions

Zedan, Adnan Jayed; Faris, Marewan Ridha; Bdaiwi, Ali Kareem

doi:10.25130/tjes.29.2.8

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…Standing water releases oxygen. It reacts with the iron wall of the pipe and leads to deterioration, (Figure 3) [53,54].…”

Section: Mechanism Of Deterioration Inhibitionmentioning

confidence: 99%

A Study of the Thermal Behavior of Some Materials Used to Prevent Corrosion in Mechanical Parts

Muhsin

2023

ARFMTS

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Thermal deterioration of Machines is the change in the properties of the basic material as a result of thermal reaction with its environment as a result of the presence of moisture in the bodies of machines such as the bodies of aircraft, cars, engineering equipment and related to the mechanics of the machines in the field of mechanical engineering, which is called the medium of deterioration and not as a result of a mechanical process such as friction in the machines as a result of work Continuous in these machines, according to this definition there is a possibility of corrosion not only in metals, but other materials such as concrete and containers that are in direct contact with moisture, air and environmental factors that are a catalyst for mechanical deterioration. Many researchers in mechanical engineering were interested in the thermal processes of machines, so the problem of corrosion and friction of machines and other important problems that have been studied extensively by finding engineering solutions to reduce or eliminate them. Corrosion of Machines be a limiting factor for various materials in many applications. Thus, it is necessary to have a better understanding of the deterioration processes, their prevention and reduction of the associated damage. In this research the preparation of some reagents and their use as deterioration inhibitors to reduce the deterioration process in engineering machinery by measuring the loss in weights resulting from the phenomenon of deterioration in engineering machinery. These thermal reagents were prepared as a thermal inhibitor painting, diagnosed in spectroscopic techniques, and then some thermal measurements were made to studying them as inhibitors of engineering corrosion in machines. The results appeared that the prepared reagents are good deterioration’s inhibitors due to the inhibition efficiency of the selected thermal reagents increased with increasing of concentration, and decreased with increasing of temperature.

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“…Standing water releases oxygen. It reacts with the iron wall of the pipe and leads to deterioration, (Figure 3) [53,54].…”

Section: Mechanism Of Deterioration Inhibitionmentioning

confidence: 99%

A Study of the Thermal Behavior of Some Materials Used to Prevent Corrosion in Mechanical Parts

Muhsin

2023

ARFMTS

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“…In Figure 7, the line represents the distribution of temperature along the fin, and the fin is at the base of domain red colour represent higher temperature and its equal 300C 0 . Along the fins, there are some dark colours represent the temperature variation on the fin [30][31][32][33][34]. There is a variation of the temperature due to heat dispersion along the fin, and the blue colour in the line represents the lowest temperature, equal to 287.581C 0 in this case.…”

Section: Temperature Distribution 311 Case 1: Cylindrical Finmentioning

confidence: 99%

“…The indication of the results that the pin fins heat sink with multiple circular stenosis have lesser pressure drop and high heat transition, difference to regular pin heat sink. This study aims to show the fin shape effect on behavior of heat transfer, the fins are used in a variety of engineering applications such as mechanical and electronic devices [29][30][31][32]. Two shapes of straight aluminum fins have been used, cylindrical and star shape, and maintains the base temperature at 300C.…”

Section: Introductionmentioning

confidence: 99%

One Dimensional Steady-State Heat Transfer on a Star Fin Shape

Dhaher

Khashan

Muhsin

2022

CFDL

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The convection heat transfers on a surface exposed to the fluid may be enhanced by attaching to the surface, known as the fins. To keep the system stable, heat transmission via solids, boundaries, or walls must be continuously dissipated to the environment or surroundings. A large quantity of heat must be dissipated from a small space in many engineering applications. A fin can boost the surface area’s effectiveness; hence, maximize convectional heat. Two shapes of straight aluminum fins have been used, cylindrical and star shape. The result shows that the star fins are appealing due to the same diameter and length; it has a lot more heat transfer than a cylindrical fin. In electronic devices, cylindrical and star fins are provided on the surface of the processor device. The result is done by SolidWorks simulation with 300 ºC on the surface as well as cylindrical and star fin. Input parameters like thermal conductivity, heat transfer coefficient, as well as fin’s density and dimensions are measured. The temperature distribution, heat flow, as well as heat flux all resembles output parameters.

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Numerical investigation of the effects of the bronchial stenosis on airflow in human respiratory tract

DEMİR,

SATICI,

KOŞAR

et al. 2024

Journal of Thermal Engineering

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Obstructive lung diseases are slowly progressing diseases that are characterized by a narrowing of airway diameter and make it harder to breathe. Although obstructive lung diseases have a high mortality rate, there are many clinical methods for early diagnosis such as impulse oscil-lometry, thorax computed tomography scans, and pulmonary function tests. The objective of this study is to investigate the effects of obstructions in main bronchitis on the airflow pattern and provide a better understanding to flow characteristics in healthy and obstructed (bronchi-al obstructions) human airways throughout a tidal breathing pattern. Seven-generation lung airway model of a healthy person was reconstructed from computed tomography (CT) images and additional models were created artificially for investigation of how obstructed airways affect flow characteristics, flow rate, tidal volumes, and air distributions. A person-specific non-uniform pressure inlet boundary condition for 12 breaths per minute was created as a time-dependent pressure profile and implemented in FLUENT software as a macro for dis-tal airways and atmospheric pressure outlet boundary condition defined at the trachea exit. Numerical simulations were carried out in SST k-w turbulence model and validated with an experimental study. Various flow properties such as lobar distribution rates, maximum flow rate changes, and airflow characteristics at different flow rates (quiet breathing-15 L/min and intense activity level-60 L/min) in the carina region, mid-trachea and sagittal section of the trachea were obtained in the human respiratory tract by computationally. The results show that regardless of flow rate, the airflow characteristics are similar for healthy models and mod-els with various stenosis grades during inhalation. In terms of maximum flow rate drop, for both inspiration and expiration phases 16%, 45%, and %80 decreases were observed in OM-I, OM-II, and OM-III, respectively. In line with the decrease in maximum flow rate similar drop, percentages were obtained for tidal volumes. Besides, with the increase of stenosis grade, the inhaled air volume distribution to the right and left upper lobes decreased between 15%-95%.

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Performance Assessment of Shirin Earth Dam in Iraq Under Various Operational Conditions

Cited by 6 publications

References 7 publications

A Study of the Thermal Behavior of Some Materials Used to Prevent Corrosion in Mechanical Parts

A Study of the Thermal Behavior of Some Materials Used to Prevent Corrosion in Mechanical Parts

One Dimensional Steady-State Heat Transfer on a Star Fin Shape

Numerical investigation of the effects of the bronchial stenosis on airflow in human respiratory tract

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