Experimentally-Benchmarked kinetic simulations of heat transfer through rarefied gas with constant heat flux at the boundary

Khan, Majad; Jobic, Yann; Graur, Irina; Hadj-Nacer, Mustafa; Zampella, Cody; Greiner, Miles

doi:10.1016/j.ijheatmasstransfer.2021.121378

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…The flow characteristics are analyzed on the basis of the Shakhov kinetic model [29]. The Shakhov kinetic model is considered one of the most widely used kinetic models in the study of isothermal (e.g., [8,23,24,[30][31][32][33]) and non-isothermal (e.g., [34][35][36][37][38][39][40][41]) gas flows in the whole range of the gas rarefaction, and its reliability has been demonstrated by performing comparisons with available experimental measurements [42][43][44][45] and DSMC data [46][47][48][49]. The Shakhov model, in its applied form, recovers both shear viscosity and thermal conductivity simultaneously and it fulfills all the collision invariants.…”

Section: Complete 4d Kinetic Solutionmentioning

confidence: 99%

Numerical Study of Rarefied Gas Flow in Diverging Channels of Finite Length at Various Pressure Ratios

Tantos,

Litovoli,

Teichmann

et al. 2024

Fluids

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In the present work, the gas flows through diverging channels driven by small, moderate, and large pressure drops are studied, considering a wide range of the gas rarefaction from free molecular limit through transition flow regime up to early slip regime. The analysis is performed using the Shakhov kinetic model, and applying the deterministic DVM method. The complete 4D flow problem is considered by including the upstream and downstream reservoirs. A strong effect of the channel geometry on the flow pattern is shown, with the distributions of the macroscopic quantities differing qualitatively and quantitatively from the straight channel flows. The mass flow rate data set from the complete solution is compared with the corresponding set obtained from the approximate kinetic methodology, which is based on the fully developed mass flow rate data available in the literature. In addition, the use of the end-effect approach significantly improves the applicability range of the approximate kinetic methodology. The influence of the wall temperature on the flow characteristics is also studied and is found to be strong in less-rarefied cases, with the mass flow rate in these cases being a decreasing function of the temperature wall. Overall, the present analysis is expected to be useful in the development and optimization of technological devices in vacuum and aerospace technologies.

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Section: Complete 4d Kinetic Solutionmentioning

confidence: 99%

Numerical Study of Rarefied Gas Flow in Diverging Channels of Finite Length at Various Pressure Ratios

Tantos,

Litovoli,

Teichmann

et al. 2024

Fluids

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show abstract

“…The theoretical research on the radiation of the cold box is mainly regarded as the blackbody radiation inside the cold box [16]. However, radiation heat transfer is greatly related to the distance between the planes [17,18]. The approximate blackbody radiation calculation equation has certain limitations.…”

Section: Introductionmentioning

confidence: 99%

Theoretical modeling and verification of storage time of cold box based on network method of radiation heat transfer

Liu

Duan

et al. 2023

Numerical Heat Transfer, Part A: Applications

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The storage time of cold box is an important subject. At present, the research method of the storage time is mainly experiment, and the theoretical research is incomplete. Therefore, in this work, a theoretical modeling combined with a network method of radiation heat transfer, shape factor of heat conduction, and sensible heat of refrigerant was proposed to calculate the storage time of a cold box at various ambient temperatures and amounts of refrigerant. The experimental and simulation results were used to verify the theoretical modeling of the storage time.

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Experimental investigation on the discharge and suction gas performance in the multilayer insulation microchannels

Yu,

Xie,

Guo

et al. 2024

International Communications in Heat and Mass Transfer

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Experimentally-Benchmarked kinetic simulations of heat transfer through rarefied gas with constant heat flux at the boundary

Cited by 5 publications

References 13 publications

Numerical Study of Rarefied Gas Flow in Diverging Channels of Finite Length at Various Pressure Ratios

Numerical Study of Rarefied Gas Flow in Diverging Channels of Finite Length at Various Pressure Ratios

Theoretical modeling and verification of storage time of cold box based on network method of radiation heat transfer

Experimental investigation on the discharge and suction gas performance in the multilayer insulation microchannels

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