Experimental study of partially metal foam wrapped tube bundles

Alvandifar, Negar; Saffar‐Avval, Majid; Amani, E.; Mehdizadeh, Amirhassan; Ebrahimipour, M.R.; Entezari, Sajad; Namazi, Hamidreza; Esfandiari-Mehni, M.; Ahmadibeni, Gholamhossein

doi:10.1016/j.ijthermalsci.2020.106798

Cited by 11 publications

(9 citation statements)

References 29 publications

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“…Total mass flow of the fuel is shown in the following equation. 𝑚̇𝑓 = (𝑚̇𝜓 − 𝑚̇𝐸 𝑉𝐷 ) − 𝑚̇𝐸 𝑉𝐹 …………….. (7) In which 𝑚̇𝜓 is mass flow of the injected fuel, 𝑚̇𝐸 𝑉𝐷 is mass flow rate of evaporated fuel to the air from the jet and 𝑚̇𝐸 𝑉𝐹 is mass flow rate of evaporated fuel from the wall. An important point to note is that it is possible to assume fuel injection as a continuous action and independent of the time of injection.…”

Section: Wall Wetting Dynamicsmentioning

confidence: 99%

“…This has led to efforts to achieve cleaner and more intrusive internal combustion engines. Before the oil crisis of the 1970s, significant people were only mindful of the easy use of cars and convenience, and no one thought about pollution and fuel consumption [2,3,[6][7][8][9]. In recent years, air pollution has become one of the significant problems in the world, causing the pollution of cars to be limited and making its control a significant issue in the policy of car manufacturers [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Estimation of the mean effective pressure of a spark ignition internal combustion engine using a neural network, considering the wall-wetting dynamics

Mahnaz Zameni,

Mahdi Ahmadi,

Arash Talebi

2024

Global J. Eng. Technol. Adv.

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The management and development of internal combustion engines stand as critical pursuits within the automotive and related industries. Utilizing cylinder pressure as feedback, engine controllers rely on intricate systems to regulate performance. However, due to the inherent complexity and nonlinearity of engines, direct measurement of cylinder pressure through pressure sensors is costly and computationally demanding. Consequently, the need for accurate and detailed engine models becomes paramount. Neural networks offer a promising avenue for simulating internal combustion engines, combining speed and precision. By treating the engine as an enigmatic entity, neural networks can construct detailed models. This study aims to employ two types of neural networks—multilayer perceptron and radial basis functions—to train and build a model of an internal combustion engine. These networks will simulate and estimate the engine's mean suitable pressure, allowing for a comparison of their effectiveness. Prior to implementing the neural network architecture, an engine model was constructed in MATLAB to gather necessary training data. This preliminary step ensured a robust foundation for subsequent network design and implementation. In summary, this research focuses on leveraging neural networks to model internal combustion engines, utilizing both multilayer perceptron and radial basis functions to simulate engine behavior and estimate mean suitable pressure.

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Section: Wall Wetting Dynamicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimation of the mean effective pressure of a spark ignition internal combustion engine using a neural network, considering the wall-wetting dynamics

Mahnaz Zameni,

Mahdi Ahmadi,

Arash Talebi

2024

Global J. Eng. Technol. Adv.

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“…According to the quasi-static pressure experimental test done by Hian Lee et al [1], this part examines the simulation of a three-dimensional artificial plastic tooth sample. This simulation investigates the crack propagation process in a tooth with a significant vertical fracture [2][3][4][5]. Additionally, it explores the application of cohesive components to determine the maximum force needed to commence damage and eliminate these cohesive elements [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the mechanical properties and propagation of cracks in prosthetic teeth composed of porcelain and dental ceramics using cohesive meshing under quasi-static loading conditions

Mahdi Ahmadi,

Alireza Maghroor Porkar Abatari

2024

World J. Adv. Res. Rev.

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With the significant progress in dental science and the reliance of dental researchers on understanding the mechanical properties and behaviors of teeth and materials used for tooth replacement, there is an increasing demand for study and research in this sector. Composite samples, dental porcelains, and materials used in 3D printers have gained significance as substitutes for human teeth. Therefore, it is crucial to conduct research and analyze these materials' physical and mechanical characteristics compared to human teeth. Tooth damage and fracture may arise from various causes, such as falls, sports-related incidents, or traffic accidents. Tooth fractures may vary in severity, ranging from mild fractures that include chipping of the tooth's surface layers, known as enamel and dentin, to more serious ones, such as diagonal, vertical, or horizontal fractures extending into the root of the tooth.

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“…It is a commonly recognized truth that the sustainability of an ecosystem hinges on the incorporation of clean energy [1][2][3][4][5][6][7]. An influential strategy in the realm of clean energy involves the application of electrochemical conversion devices [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Laboratory preparation of LSM and LSF sputtering targets using PTFE rings for deposition of SOFC thin film electrodes

Ramin Babazadeh Dizaj,

Nastaran Sabahi

2023

World J. Adv. Eng. Technol. Sci.

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The manufacturing of sputtering targets diverges from the conventional methods in ceramic processing, primarily because the quantities produced are frequently limited. The application of hot-press in this scenario significantly simplifies the sputter target fabrication process, allowing precise control over both target density and dimensions during pressing. However, without a hot press, the fabrication necessitates substantial preliminary efforts, which may be challenging to justify due to the restricted production volume. This study utilizes polytetrafluoroethylene (PTFE) rings as compaction dies filled with powders. Subsequently, the die is deformed between parallel platens, effectively compacting the powders. The method relies on the characteristic that the pressing results in minimal change in the internal diameter of the ring. This approach was exemplified through the creation of 2-inch (La0.5Sr0.5) MnO3-δ (LSM) and (La0.8Sr0.2) FeO3-δ (LSF) targets, where the deformable die was sized based on preliminary experiments involving smaller-diameter PTFE rings. The outcome of this fabrication process successfully produced sputter targets with high density, well within the tolerances of the sputter gun. Further tests involved using the prepared targets for the successful deposition of thin film LSM-LSF composite cathodes for SOFC applications.

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Experimental study of partially metal foam wrapped tube bundles

Cited by 11 publications

References 29 publications

Estimation of the mean effective pressure of a spark ignition internal combustion engine using a neural network, considering the wall-wetting dynamics

Estimation of the mean effective pressure of a spark ignition internal combustion engine using a neural network, considering the wall-wetting dynamics

Investigation of the mechanical properties and propagation of cracks in prosthetic teeth composed of porcelain and dental ceramics using cohesive meshing under quasi-static loading conditions

Laboratory preparation of LSM and LSF sputtering targets using PTFE rings for deposition of SOFC thin film electrodes

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