Open Access
Direct numerical simulation of turbulent flow over a backward-facing step
Hung Le,Parviz Moin +1 more
- pp 161-173
TLDR
In this article, the authors conduct a direct numerical simulation of turbulent backward facing step flow using inflow and outflow conditions and provide data in the form of Reynolds stress budgets for Reynolds averaged modeling.Abstract:
The objectives of this study are as follows: (1) to conduct a direct numerical simulation of turbulent backward facing step flow using inflow and outflow conditions; and (2) to provide data in the form of Reynolds stress budgets for Reynolds averaged modeling. The report presents the basic statistical data and comparisons with the concurrent experiments of Jovic and Driver and budgets of turbulent kinetic energy.read more
Citations
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Journal ArticleDOI
Generation of Turbulent Inflow Data for Spatially-Developing Boundary Layer Simulations
TL;DR: In this article, a method for generating three-dimensional, time-dependent turbulent inflow data for simulations of complex spatially developing boundary layers is described, which is essentially a variant of the Spalart method, optimized so that an existing inflow?outflow code can be converted to an inflow-generation device through the addition of one simple subroutine.
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A digital filter based generation of inflow data for spatially developing direct numerical or large eddy simulations
TL;DR: In this article, the authors present a new approach for generating artificial velocity data which reproduces first and second order one point statistics as well as a locally given autocorrelation function.
Journal ArticleDOI
A new turbulence model for predicting fluid flow and heat transfer in separating and reattaching flows—I. Flow field calculations
TL;DR: In this paper, the Kolmogorov velocity scale was introduced to account for the near-wall and low-Reynolds-number effects in both attached and detached flows.
Journal ArticleDOI
Separated flow computations with the k-e-v2 model
TL;DR: In this article, the k-e-v2 model is used to predict the time-averaged properties of bluff body flow, which is necessary to resolve the coherent vortex shedding.
Book ChapterDOI
Physical and Numerical Upgrades in the Detached-Eddy Simulation of Complex Turbulent Flows
TL;DR: In this paper, a new formulation of Detached-Eddy Simulation (DES) based on the k-ω RANS model of Menter (M-SST model) is presented, the goal being an improvement in separation prediction over the S-A model.
References
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Journal ArticleDOI
Simulation of spatially evolving turbulence and the applicability of Taylor's hypothesis in compressible flow
TL;DR: In this article, a method for generating stochastic inflow boundary conditions with a prescribed power spectrum was developed for numerical simulation of inhomogeneous turbulent flows, and the statistics of dilatation showed a significant departure from those obtained in the temporal simulation.
Journal ArticleDOI
Turbulence structure of a reattaching mixing layer
C. Chandrsuda,Peter Bradshaw +1 more
TL;DR: In this article, hot-wire measurements of second-and third-order mean products of velocity fluctuations have been made in the flow behind a backward-facing step with a thin, laminar boundary layer at the top of the step.
Book ChapterDOI
Effects of Adverse Pressure Gradients on Mean Flows and Turbulence Statistics in a Boundary Layer
TL;DR: In this article, the velocity profile in boundary layers with moderate to strong adverse pressure gradients is analyzed and compared with zero-pressure-gradient flows over most of the boundary layer.
Book
Experimental study of flow reattachment in a single-sided sudden expansion
TL;DR: The importance of changing the structure of the separated shear layer on the reattachment process itself was examined in this article, where the authors developed a pulsed wall probe for measurement of skin friction in the re-attachment region, thus providing an unambiguous definition of the Reattachment length.