2022
DOI: 10.1063/5.0103253
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Calibration of RANS model constant based on data assimilation and accurate simulation of separated flow

Abstract: To improve the prediction accuracy of separated flow based on the Reynolds Averaged Navier–Stokes model, the model constants of the baseline Reynolds stress model are calibrated by the ensemble Kalman filter data assimilation method. The separated flow in a diffuser is taken as the object, and the wall pressure coefficients of the diffuser are used as the driving data. The results show that the method that recalibrates the model constants based on data assimilation is easy to implement and is an effective meth… Show more

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Cited by 5 publications
(2 citation statements)
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“…In the present section, a numerical study of the flow in plane diffusers having no splitter vanes is performed for three different wide-angle flat diffusers. Analyzing the reviewed literature sources makes it clear that different approaches are used to model turbulent separating internal flows: Direct Numerical Simulation (DNS) in [15], Large-Eddy Simulation in [14] и [16], Shear Stress Transport (SST) model in [19], Baseline Reynolds Stress Model (BSL RSM) in [11]. It is known that DNS and LES are modeling methods that require significant time and computational resources, and for thios reason twoequation models based on turbulent viscosity are most often applied to solve engineering problems -…”
Section: Selection Of Numerical Modeling Methods and Turbulence Modelmentioning
confidence: 99%
See 1 more Smart Citation
“…In the present section, a numerical study of the flow in plane diffusers having no splitter vanes is performed for three different wide-angle flat diffusers. Analyzing the reviewed literature sources makes it clear that different approaches are used to model turbulent separating internal flows: Direct Numerical Simulation (DNS) in [15], Large-Eddy Simulation in [14] и [16], Shear Stress Transport (SST) model in [19], Baseline Reynolds Stress Model (BSL RSM) in [11]. It is known that DNS and LES are modeling methods that require significant time and computational resources, and for thios reason twoequation models based on turbulent viscosity are most often applied to solve engineering problems -…”
Section: Selection Of Numerical Modeling Methods and Turbulence Modelmentioning
confidence: 99%
“…In [10], [11], [12] and [13] numerical studies of vaneless diffusers are presented, and the results are compared with experimental ones. Results obtained by performing numerical studies in the field of plane diffusers are presented in [14], [15], [16] and [17].…”
Section: Introductionmentioning
confidence: 99%