Journal Article10.1007/S11630-012-0529-2
Numerical Simulation of Separated Flows in Channels
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TL;DR: In this paper, the performance of several eddy viscosity models and an explicit algebraic Reynolds stress model (EARSM) is studied for turbulent flows in channels with an expansion of the cross-section where flow separation and reattachment occur.
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Abstract: The work deals with numerical modelling of turbulent flows in channels with an expansion of the cross-section where flow separation and reattachment occur. The performance of several eddy viscosity models and an explicit algebraic Reynolds stress model (EARSM) is studied. The used test cases are flows in channels with various backward facing steps where the step is perpendicular or inclined and the top wall is parallel or deflected. Furthermore, a channel with the circular ramp is considered. The numerical solution is achieved by the finite volume method or by the finite element method. The results of both numerical approaches are compared.
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Citations
Numerical simulation of flows over 2D and 3D backward-facing inclined steps
TL;DR: In this article, the numerical solution of incompressible turbulent flow in a channel with a backward-facing step having various inclination angles is considered, where the numerical model is based on the Reynolds averaged Navier-Stokes equations.
References
Two-equation eddy-viscosity turbulence models for engineering applications
TL;DR: In this paper, two new two-equation eddy-viscosity turbulence models are presented, which combine different elements of existing models that are considered superior to their alternatives.
A Numerical Method for Solving Incompressible Viscous Flow Problems
TL;DR: In this article, a numerical method for solving incompressible viscous flow problems is introduced, which uses the velocities and the pressure as variables and is equally applicable to problems in two and three space dimensions.
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Experimental and Theoretical Investigation of Backward-Facing Step Flow
TL;DR: In this paper, the velocity distribution and reattachment length of a single backward-facing step mounted in a two-dimensional channel were measured using laser-Doppler measurements.
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An explicit algebraic Reynolds stress model for incompressible and compressible turbulent flows
Stefan Wallin,Arne V. Johansson +1 more
TL;DR: In this article, an explicit algebraic Reynolds stress turbulence model (EARSM) is presented for both incompressible and compressible three-dimensional wall-bounded turbulent flows, which represents a solution of implicit ARSM equations, where the production to dissipation ratio is obtained as a solution to a nonlinear algebraic relation.
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Features of a reattaching turbulent shear layer in divergent channel flow
David M. Driver,H. L. Seegmiller +1 more
TL;DR: In this article, experimental data have been obtained in an incompressible turbulent flow over a rearward-facing step in a diverging channel flow and mean velocities, Reynolds stresses, and triple products that were measured by a laser Doppler velocimeter are presented for two cases of tunnel wall divergence.
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