Experimental and computational analysis of polymeric lattice structure for efficient building materials

Alqahtani, Saad; Ali, Hafız Muhammad; Farukh, Farukh; Kandasamy, Karthikeyan

doi:10.1016/j.applthermaleng.2022.119366

Cited by 13 publications

(7 citation statements)

References 46 publications

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“…In ANSYS, the lattice faces should be meshed using the appropriate elements. In addition, the mesh quality should be thoroughly verified to avoid unrealistic meshes with excess distortion and size changes (Alqahtani et al 2023). To determine the appropriate number of mesh cells, test meshes of 1.47 million, 2.02 million, 2.85 million, 3.44 million, and 4.17 million grids were selected for mesh independence verification.…”

Section: Mesh and Geometry Modelmentioning

confidence: 99%

Numerical Simulation and Experimental Study on Internal Depressurization Flow Characteristics of a Multi-layer Sleeve Regulating Valve

2023

JAFM

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The sleeve regulating valve is an important part of a pipeline system and is widely used in the fields of nuclear power and thermal power. In this study, a series of numerical and experimental studies are performed to understand the depressurized flow characteristics inside a new type of multi-layer sleeve regulating valve. In the calculations, the standard k-ԑ turbulence model and the mixture model combined with the Zwart–Gerber–Belamri cavitation model are used to clarify the internal flow and cavitation characteristics in the regulating valve. With the new valve, the results show that when the valve is fully opened, the pressure drop at all levels of the valve is comparatively average (approximately 2–3 MPa for each level) and the fluid velocity in the sleeves at all levels is comparatively uniform at 90 m/s—which can prevent the valve from being eroded by highly changing fluid flow rates, and also offers ideal pressure reduction performance. To reduce the degree of cavitation, it is recommended to adjust the outlet pressure of the valve to 0.7 MPa.

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Section: Mesh and Geometry Modelmentioning

confidence: 99%

Numerical Simulation and Experimental Study on Internal Depressurization Flow Characteristics of a Multi-layer Sleeve Regulating Valve

2023

JAFM

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“…The tuebulence model k-ε is adopted to simulate the hydrodynamic characteristics of the undulatory fin, and its transport equation is as follows (Hussain et al 2022;Alqahtani et al 2023):…”

Section: Turbulence Modelmentioning

confidence: 99%

Hydrodynamic Characteristics of an Electric Eel-Like Undulating Fin

2023

JAFM

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Taking the electric eel as a bionic object, a long undulatory fin is designed. The turbulent model standard k-ε is used to solve the N‒S equation of a three-dimensional unsteady incompressible fluid. The hydrodynamic characteristics of the undulatory fin are studied, and the influence of the swing angle, wave frequency and ground effects on the propulsion performance of the undulatory fin are discussed. The mathematical models of the average thrust and average lateral force of the undulatory fin are established by using multiple linear regression. The results show that the thrust and lateral force of the undulatory fin increase with increasing swing angle and swing frequency, but in a motion period, the number of fluctuations of the thrust is approximately twice that of the lateral force. The relationship between the average thrust force and the average lateral force of the undulatory fin and the wave frequency and the maximum swing angle satisfies a specific exponential law. When the undulating fin moves near the wall (d ≤0.2 W), due to the coupling between the vortex at the lower edge and the tail vortex where part of the vortex is transferred to the two sides, the total thrust decreases, and the lateral force increases.

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“…In addition, high temperatures and heating rates can be obtained through microwave heating (Ludlow‐Palafox & Chase, 2001) demonstrating remarkably high conversion efficiency of electrical energy into heat (80%– 85%) (Green et al., 2019; Osepchuk, 2002). Besides, there are numerous works in this regard related to the cooling and air conditioning systems (Alqahtani et al., 2023; Hussain et al., 2022; Zawawi et al., 2022).…”

Section: Introductionmentioning

confidence: 99%

CFD simulation of a shell and multiple tubes condensing heat exchanger in a modified microwave plant applied for reprocessing End of Life Tires (ELTs)

Babaei‐Mahani

Sardari

Soltani

et al. 2023

Environmental Quality Mgmt

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The condensation heat exchanger has a critical role in the microwave reduction process to separate and capture valuable by‐products after the microwave reactor. This study aims to perform a computational fluid dynamics (CFD) simulation of a condenser to assess the heat transfer performance of the heat exchanger comprehensively. The type of heat exchanger used for this study is based upon an existing industrial‐scale condenser taken from a conventional thermal pyrolysis end of tires (ELT) reprocessing plant and repurposed for integration into a 1500 kg/h ELT microwave reduction process. The condenser is a shell‐and‐multiple‐tube heat exchanger in which the syngas passes through the tubes while cold water from a cooling tower is placed inside the shell. After the simulation, the effects of inlet temperatures and mass flow rates of the gas and water are investigated. The results show that the heat transfer rate is 58 kW for the inlet air velocity of 0.25 m/s and increases due to the convective heat transfer by 32% and 55% when the air velocity rises to 0.5 and 1 m/s, respectively, for the inlet gas and water temperatures of 80 and 15°C, respectively. Additionally, because the outlet air temperature and the inlet water temperature are strongly correlated with convective heat transfer, the outlet air temperature is equivalent to 17.2, 22.3, and 29.5°C when the inlet water temperature is 15, 20, and 25°C, respectively.

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Experimental and computational analysis of polymeric lattice structure for efficient building materials

Cited by 13 publications

References 46 publications

Numerical Simulation and Experimental Study on Internal Depressurization Flow Characteristics of a Multi-layer Sleeve Regulating Valve

Numerical Simulation and Experimental Study on Internal Depressurization Flow Characteristics of a Multi-layer Sleeve Regulating Valve

Hydrodynamic Characteristics of an Electric Eel-Like Undulating Fin

CFD simulation of a shell and multiple tubes condensing heat exchanger in a modified microwave plant applied for reprocessing End of Life Tires (ELTs)

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