Development of an alternative delayed detached-eddy simulation formulation based on elliptic relaxation

Neil Ashton; Alistair Revell; Robert Prosser; Juan Uribe

doi:10.2514/1.J051808

Development of an alternative delayed detached-eddy simulation formulation based on elliptic relaxation

Neil Ashton, Alistair Revell, Robert Prosser, Juan Uribe

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Abstract

A new delayed detached-eddy simulation (DDES) model is formulated that demonstrate both improved modeling of the near-wall physics and numerical robustnesss for industrial applications. For the majority of the flow, DDES formulations predict the correct level of turbulent shear stress and, therefore, a similar velocity profile to that of the reference large eddy simulation (LES) and experimental data. The higher level of resolved turbulence for the shear-stress transport SST?DDES model means there will be greater fluid mixing in the recirculation zone. The oncoming flow is characterized by a zero-pressure-gradient turbulent boundary layer, whose thickness is approximately 57% of the hump height measured at the upstream extent of the domain. The DDES model predicts the correct recirculation strength and matches the experimental reattachment point more closely than the SST?DDES model.

Original language	English
Pages (from-to)	513-518
Number of pages	5
Journal	AIAA Journal
Volume	51
Issue number	2
DOIs	https://doi.org/10.2514/1.J051808
Publication status	Published - Feb 2013

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title = "Development of an alternative delayed detached-eddy simulation formulation based on elliptic relaxation",

abstract = "A new delayed detached-eddy simulation (DDES) model is formulated that demonstrate both improved modeling of the near-wall physics and numerical robustnesss for industrial applications. For the majority of the flow, DDES formulations predict the correct level of turbulent shear stress and, therefore, a similar velocity profile to that of the reference large eddy simulation (LES) and experimental data. The higher level of resolved turbulence for the shear-stress transport SST?DDES model means there will be greater fluid mixing in the recirculation zone. The oncoming flow is characterized by a zero-pressure-gradient turbulent boundary layer, whose thickness is approximately 57\% of the hump height measured at the upstream extent of the domain. The DDES model predicts the correct recirculation strength and matches the experimental reattachment point more closely than the SST?DDES model.",

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T1 - Development of an alternative delayed detached-eddy simulation formulation based on elliptic relaxation

AU - Ashton, Neil

AU - Revell, Alistair

AU - Prosser, Robert

AU - Uribe, Juan

PY - 2013/2

Y1 - 2013/2

N2 - A new delayed detached-eddy simulation (DDES) model is formulated that demonstrate both improved modeling of the near-wall physics and numerical robustnesss for industrial applications. For the majority of the flow, DDES formulations predict the correct level of turbulent shear stress and, therefore, a similar velocity profile to that of the reference large eddy simulation (LES) and experimental data. The higher level of resolved turbulence for the shear-stress transport SST?DDES model means there will be greater fluid mixing in the recirculation zone. The oncoming flow is characterized by a zero-pressure-gradient turbulent boundary layer, whose thickness is approximately 57% of the hump height measured at the upstream extent of the domain. The DDES model predicts the correct recirculation strength and matches the experimental reattachment point more closely than the SST?DDES model.

AB - A new delayed detached-eddy simulation (DDES) model is formulated that demonstrate both improved modeling of the near-wall physics and numerical robustnesss for industrial applications. For the majority of the flow, DDES formulations predict the correct level of turbulent shear stress and, therefore, a similar velocity profile to that of the reference large eddy simulation (LES) and experimental data. The higher level of resolved turbulence for the shear-stress transport SST?DDES model means there will be greater fluid mixing in the recirculation zone. The oncoming flow is characterized by a zero-pressure-gradient turbulent boundary layer, whose thickness is approximately 57% of the hump height measured at the upstream extent of the domain. The DDES model predicts the correct recirculation strength and matches the experimental reattachment point more closely than the SST?DDES model.

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DO - 10.2514/1.J051808

M3 - Article

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VL - 51

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EP - 518

JO - AIAA Journal

JF - AIAA Journal

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Development of an alternative delayed detached-eddy simulation formulation based on elliptic relaxation

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