Numerical Analysis and Circuit Model of Tunable Dual-Band Terahertz Absorbers Composed of Concentric Graphene Disks and Rings

Arabmohammadi, Mona; Kashani, Zahra Ghattan; Sheikhan, Ramezan Ali Sadeghzadeh

doi:10.1007/s11664-020-08336-y

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…It is found that the boundary element method can better solve the end face deformation. Literature [17] put forward a TEHD numerical analysis model of mechanical seal considering the influence factors such as heat, inertia effect, and turbulence and analyzed the thermal deformation of the seal ring by calculating the heat conduction between the fluid film and the seal end face. The results show that the deformation of the end face has an important influence on the thickness of the lubricant film on the seal end face.…”

Section: Related Workmentioning

confidence: 99%

Friction Performance Analysis of Reactor Coolant Pump Shaft Seal Based on Sensor and Computer Simulation

2022

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In recent years, the state has put forward a grand plan to develop nuclear power in order to control environmental pollution and carbon emissions. In nuclear power plants, mechanical seals for reactor coolant pump play an important role in nuclear power safety production. However, China cannot independently produce such mechanical seals, and they are blocked by foreign related technologies, which has seriously affected China’s nuclear power development plan and the overall safety of China’s nuclear power operation. Under this background, this paper studies the friction performance of the shaft seal of the reactor coolant pump, uses the sensor to obtain the data of friction factors such as low-pressure leakage, effectively monitors the low-pressure leakage through calculation and simulation modeling, truly reflects the operating state of the reactor coolant pump, and provides a new research direction and experimental basis for further analysis of the friction performance of the shaft seal of the reactor coolant pump. The results show that under the joint action of the pressure difference and the force generated by the deformation of the moving ring plate, the cone angle formed on the seal end face is 1300.9 μ convergence gap of rad. When the inlet water temperature is 65°C, the leakage rate is 1867.8 L/h. The deformation of the moving ring deformation ring plate can hinder the increase of the deformation cone angle of the moving ring. The greater the thickness of the moving ring deformation ring plate, the greater the seal leakage rate. The inlet temperature of the sealing medium and the friction performance of the material also have an impact on the sealing performance.

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Section: Related Workmentioning

confidence: 99%

Friction Performance Analysis of Reactor Coolant Pump Shaft Seal Based on Sensor and Computer Simulation

2022

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“…For most of the practical applications, tunable absorption is preferred. In the THz frequency range, the following active materials, such as graphene [21][22][23], thermal [24][25][26][27], phase change materials [28][29][30], and intensity tunable materials [31,32], are used for the controllable absorption.…”

Section: Introductionmentioning

confidence: 99%

Ultra-thin polarization independent broadband terahertz metamaterial absorber

Gandhi

Babu

Senthilnathan

2021

Front. Optoelectron.

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In this work, we present the design of a polarization independent broadband absorber in the terahertz (THz) frequency range using a metasurface resonator. The absorber comprises of three layers, of which, the top layer is made of a vanadium dioxide (VO 2 ) resonator with an electrical conductivity of σ = 200000 S/m; the bottom layer consists of a planar layer made of gold metal, and a dielectric layer is sandwiched between these two layers. The optimized absorber exhibits absorption greater than 90% from 2.54 -5.54 THz. Thus, the corresponding bandwidth of the designed absorber is 3 THz. Further, the thermal tunable absorption and reflection spectra have been analyzed by varying the electrical conductivity of VO 2 . The impact of the various geometrical parameters on the absorption characteristics has also been assessed. The physics of generation of broadband absorption of the proposed device has been explored using field analysis. Finally, the absorption characteristics of the unit cell has been studied for various incident and polarization angles.

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Sensitivity Increment of Metamaterial-based Refractive Index Sensor with Silicon Layers

Khodadadi,

Babaeinik,

Ghods

et al. 2023

Silicon

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Numerical Analysis and Circuit Model of Tunable Dual-Band Terahertz Absorbers Composed of Concentric Graphene Disks and Rings

Cited by 6 publications

References 35 publications

Friction Performance Analysis of Reactor Coolant Pump Shaft Seal Based on Sensor and Computer Simulation

Friction Performance Analysis of Reactor Coolant Pump Shaft Seal Based on Sensor and Computer Simulation

Ultra-thin polarization independent broadband terahertz metamaterial absorber

Sensitivity Increment of Metamaterial-based Refractive Index Sensor with Silicon Layers

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