DNS of turbulent low Mach channel flow under asymmetric high temperature gradient: Effect of thermal boundary condition on turbulence statistics

Avellaneda, J.M.; Bataille, Françoise; Toutant, Adrien

doi:10.1016/j.ijheatfluidflow.2019.03.002

Cited by 17 publications

(9 citation statements)

References 47 publications

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“…However, neither the temperature nor the heat flux are spatially constant over the walls of the solar receiver. Avellaneda et al 47 show that there are not significant differences between the two types of thermal boundaries conditions for turbulent low Mach channel flow under asymmetric high temperature gradient. The thermodynamical pressure, P 0 , is 10 bars.…”

Section: Study Configuration a Channel Flow Configurationmentioning

confidence: 99%

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Investigation of thermal large-eddy simulation approaches in a highly turbulent channel flow submitted to strong asymmetric heating

2021

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Section: Study Configuration a Channel Flow Configurationmentioning

confidence: 99%

“…TrioCFD software 50 is used to perform the simulations. This code has been developed by the French Alternative Energies and Atomic Energy Commission and has been used in many simulations of fluid flows 4,5,47,[51][52][53] .…”

Section: B Numerical Settingsmentioning

confidence: 99%

Investigation of thermal large-eddy simulation approaches in a highly turbulent channel flow submitted to strong asymmetric heating

2021

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“…One is the case of a temperature difference between two isothermal walls, and the other is the case of an isothermal wall and an adiabatic wall, or the case of isothermal-adiabatic (I-A) walls. The first case has been studied by several groups using DNS or large-eddy simulations, and most of them have focused on the nearly incompressible situations (Wang & Pletcher 1996;Lessani & Papalexandris 2008;Nagata & Nagaoka 2017;Ma, Yang & Ihme 2018;Avellaneda et al 2021), which are believed to be closely related to the flow characteristics in solar receivers (Serra et al 2012;Avellaneda, Bataille & Toutant 2019;Toki, Teramoto & Okamoto 2020). For the fully compressible situations with Ma > 0.3, studies are rather scarce, and they were carried out mainly to serve as a comparison object for the latter I-A cases (Tamano & Morinishi 2006;Baranwal, Donzis & Bowersox 2023).…”

Section: Introductionmentioning

confidence: 99%

Direct numerical simulations of compressible turbulent channel flows with asymmetric thermal walls

Zhang,

Song,

Xia

2024

J. Fluid Mech.

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This paper extends the work of Tamano & Morinishi (J. Fluid Mech., vol. 548, 2006, pp. 361–373) by simulating supersonic turbulent channel flow with asymmetric thermal walls using a larger computational domain and a finer mesh. Direct numerical simulation is carried out for four cases with different thermal wall boundaries at the top wall at fixed $Ma=1.5$ , $Re=6000$ and $Pr=0.72$ , while the bottom wall is maintained at a constant temperature of $T_L$ equal to the reference temperature. These cases are referred to as the adiabatic case TAd, where the top wall is adiabatic; the pseudo-adiabatic case T32, where the top wall is isothermal with temperature $T_{w,t}=T_A$ ; the sub-adiabatic case T25, with $T_{w,t}=0.77T_A$ ; and the super-adiabatic case T40, with $T_{w,t}=1.24T_A$ . Here, $T_A=3.234$ is the mean temperature at the adiabatic wall in the TAd case. The objective of this study is to compare and contrast the TAd case with its corresponding T32 case, and to investigate the effect of the wall temperature difference between the two isothermal walls. Comparisons of the basic turbulent statistics, the heat transfer between the Favre-averaged mean-flow kinetic energy, the Favre-averaged turbulent kinetic energy and the Favre-averaged mean internal energy, as well as the wall heat transfer properties, indicate that the TAd case and its corresponding T32 case are generally equivalent. The only discernible difference is in the region very close to the top wall for the temperature-fluctuation-related quantities. The analysis reveals that the asymmetry of the thermal walls causes asymmetry in the flow and thermal fields. In addition, the transfer of the heat generated by the pressure dilatation and the viscous stress is facilitated by the turbulent heat flux term and the mean molecular heat flux term.

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“…Aulery et al (Aulery et al, 2017) This contribution is responsible for around 10% of the total process. Avellaneda et al (Avellaneda et al, 2019) discussed the local entropy generation rate thanks to DNS performed at mean friction Reynolds from 150 to 210, with wall temperature of 293 K and 879 K. The results suggest that an increase in the wall temperature ratio leads to larger entropy generation rates, and to accentuate the asymmetry between the cold wall and the hot wall. The authors notice that the entropy generation rates is always bigger at the cold wall than at the hot wall.…”

Section: Introductionmentioning

confidence: 99%

Study of asymmetrically heated flows passing through gas-pressurized solar receivers using Direct Numerical Simulations

David

Toutant

Bataille

2023

International Journal of Heat and Mass Transfer

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DNS of turbulent low Mach channel flow under asymmetric high temperature gradient: Effect of thermal boundary condition on turbulence statistics

Cited by 17 publications

References 47 publications

Investigation of thermal large-eddy simulation approaches in a highly turbulent channel flow submitted to strong asymmetric heating

Investigation of thermal large-eddy simulation approaches in a highly turbulent channel flow submitted to strong asymmetric heating

Direct numerical simulations of compressible turbulent channel flows with asymmetric thermal walls

Study of asymmetrically heated flows passing through gas-pressurized solar receivers using Direct Numerical Simulations

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