Influence of the numerical schemes on the flow states of a simplified heavy vehicle
Paper in proceedings, 2018

Recent experiments [1, 2] in the wake of a simplified heavy vehicle (also know as a ground transportation system (GTS)) have shown that the flow topology remains invariant over a large range of Reynolds numbers [3.8 × 10 4 − 2.8 × 10 6 ]. This allows numerical techniques such as large eddy simulations (LES) to accurately predict the flow topology at low Reynolds numbers. While LES requires grids of higher spatial resolution; hybrid RANS/LES turbulence models are an alternate choice, where, accurate prediction of the flow is possible on coarser grids ([3, 4]). Numerical simulations are performed using LES and a hybrid turbulence model - partially-averaged Navier–Stokes (PANS) equations at Re H = 3.8 × 10 4 for a unified tractor-trailer geometry to compare the flow topologies in the near wake. The influence of the numerical schemes on the flow topology in the symmetry plane which is susceptible to bi-stable flow is investigated using PANS, and compared with the results from LES.

Author

Anirudh Narayan Rao

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

Jie Zhang

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

Guglielmo Minelli

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

Branislav Basara

AVL

Sinisa Krajnovic

Chalmers, Mechanics and Maritime Sciences, Fluid Dynamics

Turbulence, Heat and Mass Transfer 9
Rio de Janerio, Brazil,

Subject Categories

Mechanical Engineering

Aerospace Engineering

Applied Mechanics

Fluid Mechanics and Acoustics

Areas of Advance

Energy

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Latest update

5/25/2018