Numerical Investigations of Massively Separated Flows past Rudimentary Landing Gear using SST-DDES

2012 ◽  
Author(s):  
Zhixiang Xiao ◽  
Jian Liu ◽  
Kunyu Zuo ◽  
Jingbo Huang ◽  
Song Fu
Keyword(s):  
Landing Gear ◽  
Separated Flows ◽  
Numerical Investigations ◽  
Massively Separated Flows

Assessment of Large-Eddy Simulation of Internal Separated Flow

2009 ◽  
Vol 131 (7) ◽  
Author(s):  
Marco Hahn ◽  
Dimitris Drikakis
Keyword(s):  
Separated Flow ◽  
Separated Flows ◽  
Scalar Conservation Laws ◽  
Third Order ◽  
Eddy Simulation ◽  
Massively Separated Flows ◽  
Large Eddy ◽  
Stress Profiles ◽  
Scalar Conservation ◽  
Fifth Order

This paper presents a systematic numerical investigation of different implicit large-eddy simulations (LESs) for massively separated flows. Three numerical schemes, a third-order accurate monotonic upwind scheme for scalar conservation laws (MUSCL) scheme, a fifth-order accurate MUSCL scheme, and a ninth-order accurate weighted essentially non-oscillatory (WENO) method, are tested in the context of separation from a gently curved surface. The case considered here is a simple wall-bounded flow that consists of a channel with a hill-type curvature on the lower wall. The separation and reattachment locations, velocity, and Reynolds stress profiles are presented and compared against solutions from classical LES simulations.

Comparative assessment of SAS and DES turbulence modeling for massively separated flows

2015 ◽  
Vol 32 (1) ◽  
pp. 12-21 ◽  
Author(s):  
Weilin Zheng ◽  
Chao Yan ◽  
Hongkang Liu ◽  
Dahai Luo
Keyword(s):  
Turbulence Modeling ◽  
Comparative Assessment ◽  
Separated Flows ◽  
Massively Separated Flows

Progress on detached-eddy simulation of massively separated flows

2002 ◽  
Author(s):  
K. Squires ◽  
J. Forsythe ◽  
S. Morton ◽  
W. Strang ◽  
K. Wurtzler ◽  
...  
Keyword(s):  
Separated Flows ◽  
Detached Eddy Simulation ◽  
Eddy Simulation ◽  
Massively Separated Flows

scholarly journals Machine learning-augmented turbulence modeling for RANS simulations of massively separated flows

2021 ◽  
Vol 6 (6) ◽  
Author(s):  
Pedro Stefanin Volpiani ◽  
Morten Meyer ◽  
Lucas Franceschini ◽  
Julien Dandois ◽  
Florent Renac ◽  
...  
Keyword(s):  
Machine Learning ◽  
Turbulence Modeling ◽  
Separated Flows ◽  
Massively Separated Flows ◽  
Rans Simulations

Progress in the Computation of Turbulent Heat Transfer in Massively Separated Flows

2013 ◽  
Author(s):  
B. A. Younis ◽  
B. Arnold ◽  
P. Weihing ◽  
B. Weigand
Keyword(s):  
Heat Transfer ◽  
Heat Fluxes ◽  
Separated Flows ◽  
Turbulent Heat Transfer ◽  
Periodic Flow ◽  
Turbulent Heat ◽  
Fluctuating Pressure ◽  
Massively Separated Flows ◽  
Turbulent Heat Fluxes ◽  
Heated Channel

The paper reports on work in progress aimed at improving the prediction of heat transfer in turbulent separated flows. The cases considered here are the flow over a heated backward-facing step, and the periodic flow in a heated channel with square ribs. The predictions were obtained using two models not hitherto employed in these flows: a Reynolds-stress transport closure in which the model for the fluctuating pressure-strain correlations that satisfies the requirement of model objectivity while not requiring wall-damping functions, and a model for the turbulent heat fluxes that is explicit, algebraic and correctly allows for these fluxes to depend on the gradients of mean temperature and velocity. Both models have previously given good predictions in attached shear flows and the objective of this work was to determine whether this improvement carries over to separated flows. It was found that distinct improvements in the prediction of skin friction and Nusselt number can only be obtained by extending the models so as to allow the computations to extend through the viscous sub-layer directly to the wall.

Sign in / Sign up

Export Citation Format

Share Document