Influence of model selection on the temperature field and turbulent energy dissipation rate in a hydraulic system with a complex geometry

Khanfouf, Omar; Fourar, Fatima Zohra; Fourar, Ali; Massouh, Fawaz; Chiremsel, Rachid; Zeroual, Abdellatif; Khelladi, Sofiane

doi:10.1007/s40808-022-01591-4

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…This improvement improves the performance of the model for strong inverse pressure gradients and separated flows. Additionally, the full formulation of the mathematical model for thermal mass transport is provided, where the turbulent kinetic energy k and turbulent frequency can be obtained from the following thermal mass transport equations 16 , 17 : where where y is the distance closest to the wall; S is the strain rate; is the density of air; is the pressure. This study focuses on incompressible gases, so .…”

Section: Methodsmentioning

confidence: 99%

Comparative study on numerical simulation of temperature field of farm house with different roof forms

Pan,

Zhao,

Wang

2024

Sci Rep

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In recent years, the issue of energy consumption in farm buildings has received much attention. The roofs of farm buildings in Northwest China have a variety of roof forms. This paper presents the implementation of first fully confirmed the indoor thermal environment of different roof construction was significantly effected by periodic thermogenesis. In order to determine the indoor temperature distribution of the farmhouse in summer in Ningxia Hui Autonomous Region, we provided the heat transfer coefficient data of the farmhouse envelope, also detailed in the manuscript. Model of Thermal Mass Transport enables fast and accurately simulates the indoor temperature distribution of farmhouses with different roof forms on the same day, taking into account the climate zone of the region. This is despite the phase delay time of indoor temperatures for different roof forms caused by periodic initial temperature boundaries ranged from 1.55 to 2.78$$\text{h}$$ h , and the phase delay angle ranged from 23.25$$^{\circ }$$ ∘ to 41.7$$^{\circ }$$ ∘ . Extensive simulated results revealed individual variability in the role of roof form, demonstrating indoor temperatures in farmhouses corresponding to different climatic zones. In addition, by analyzing and discussing the indoor temperature phase delay angle and delay time for each type of roof forms, statistical results identified the advantages of Non-equal-sloped roof as a local farmhouse roof.

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Section: Methodsmentioning

confidence: 99%

Comparative study on numerical simulation of temperature field of farm house with different roof forms

Pan,

Zhao,

Wang

2024

Sci Rep

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Experimental study and numerical simulation of fluvial dynamics and sediment transport in instationary flow conditions

Fourar

Fourar²,

Khanfouf³

et al. 2023

Model. Earth Syst. Environ.

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Experimental Study on Structure Optimization and Dynamic Characteristics of Articulated Steering for Hydrogen Fuel Cell Engineering Vehicles

Zhang,

Wang,

Tong

et al. 2024

WEVJ

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The prominent problem of articulated steering structure of engineering vehicle is that there is pressure oscillation in the hydraulic system during steering, which seriously affects the performance of steering system. To solve this problem, the maximum stroke difference of left and right cylinders and the minimum maximum cylinder pressure are the optimization objectives, and the position of cylinder hinge point is the design variable. The multi-objective optimization design of articulated steering system is carried out by using the particle swarm optimization algorithm. After optimization, the maximum pressure of the steering system is reduced by 13.5%, and the oscillation amplitude is reduced by 16%, so the optimization effect is obvious. The dynamic characteristics of the hydraulic steering system under different loads, such as pressure and flow rate, are obtained through field steering tests of wheel loaders. The results show that the load has an important effect on the pressure response of the system, and the causes and influencing factors of pressure and flow fluctuation are determined. The relationship between mileage and hydrogen consumption is obtained, which provides data support for vehicle control strategy. The high-pressure overflow power consumption accounts for 60% of the total work, and the work lost on the steering gear reaches 36 kJ. The test results verify the rationality and correctness of the optimization method of steering mechanism and provide data support for the improvement in steering hydraulic system.

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Influence of model selection on the temperature field and turbulent energy dissipation rate in a hydraulic system with a complex geometry

Cited by 3 publications

References 8 publications

Comparative study on numerical simulation of temperature field of farm house with different roof forms

Comparative study on numerical simulation of temperature field of farm house with different roof forms

Experimental study and numerical simulation of fluvial dynamics and sediment transport in instationary flow conditions

Experimental Study on Structure Optimization and Dynamic Characteristics of Articulated Steering for Hydrogen Fuel Cell Engineering Vehicles

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