Accurate discretization of diffusion in the LS-STAG cut-cell method using diamond cell techniques

Portelenelle, Brice; Botella, Olivier; Cheny, Yoann

doi:10.1016/j.compfluid.2019.05.005

Cited by 2 publications

(2 citation statements)

References 18 publications

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“…Radiative heat transfer appears then as a source term in the overall energy conservation equation and is only one of the many complex phenomena that must be modeled in TRI. The present numerical method and the so called "LS-STAG code" [38,39] will be used as radiative and…”

Section: Discussionmentioning

confidence: 99%

Numerical solutions of radiative heat transfer in combustion systems using a parallel modified discrete ordinates method and several recent formulations of WSGG model

Asllanaj

Contassot-Vivier

Botella

et al. 2021

Journal of Quantitative Spectroscopy and Radiative Transfer

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Section: Discussionmentioning

confidence: 99%

Numerical solutions of radiative heat transfer in combustion systems using a parallel modified discrete ordinates method and several recent formulations of WSGG model

Asllanaj

Contassot-Vivier

Botella

et al. 2021

Journal of Quantitative Spectroscopy and Radiative Transfer

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“…For the simulations presented here, we developed and implemented a variant of the cut cell method originally proposed by Dröge and Verstappen (2005), Dröge (2006) and extended upon by Cheny and Botella (2010), Nikfarjam et al (2018), Portelenelle et al (2019). The advantage of the cut cell method compared to the ghost cell method (Peller et al 2006;Peller 2010) that we have used for previous simulations (Schanderl and Manhart 2016;) is that the whole fluid volume is covered by control volumes.…”

Section: The Cut Cell Methodsmentioning

confidence: 99%

Large–Eddy Simulation of the Flow Inside a Scour Hole Around a Circular Cylinder Using a Cut Cell Immersed Boundary Method

Unglehrt

Jenssen

Kurz³

et al. 2022

Flow Turbulence Combust

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We present a novel symmetry-preserving cut cell finite volume method which is a three-dimensional generalisation of the method by Dröge and Verstappen (Int J Numer Method Fluids 47:979–985, 2005). A colour-coding scheme for the three-dimensional cut momentum cell faces reduces the number of possible cut cell configurations. A cell merging strategy is employed to alleviate time step constraints. We demonstrate the energy conservation property of the convective and pressure gradient terms, and the second-order spatial convergence with suitable benchmark cases. We used the scheme to perform highly resolved large–eddy simulations of the flow inside a scour hole around a circular cylinder mounted vertically in a flume. The simulation results are extensively compared to a stereoscopic particle image velocimetry experiment of the same configuration performed by Jenssen and Manhart (Exp Fluids 61:217, 2020). We demonstrate that for the investigated Reynolds numbers (20,000 and 40,000) nearly converged solutions are obtained; however at large computational efforts (up to 2.35 billion cells for the higher Reynolds number). It turns out that the flow topology of the horseshoe vortex system is strongly dependent on the grid resolution. For simulation results obtained on the finest grid, the mean flow and turbulence quantities agree well with the experiment. We investigate the shape and turbulence structure of the horseshoe vortex based on three-dimensional fields, and discuss the distribution of the mean and standard deviation of the wall shear stress in the scour hole and the implications for the physics of the scouring process over a sand bed.

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Accurate discretization of diffusion in the LS-STAG cut-cell method using diamond cell techniques

Cited by 2 publications

References 18 publications

Numerical solutions of radiative heat transfer in combustion systems using a parallel modified discrete ordinates method and several recent formulations of WSGG model

Numerical solutions of radiative heat transfer in combustion systems using a parallel modified discrete ordinates method and several recent formulations of WSGG model

Large–Eddy Simulation of the Flow Inside a Scour Hole Around a Circular Cylinder Using a Cut Cell Immersed Boundary Method

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