An Immersogeometric Method for the Simulation of Turbulent Flow Around Complex Geometries

2016 ◽  
pp. 111-125
Author(s):  
Fei Xu ◽  
David Kamensky ◽  
Vasco Varduhn ◽  
Chenglong Wang ◽  
Sean A. Wasion ◽  
...  
Keyword(s):  
Turbulent Flow ◽  
Complex Geometries

scholarly journals Finite Element Analysis of Turbulent Flows Using LES and Dynamic Subgrid-Scale Models in Complex Geometries

2011 ◽  
Vol 2011 ◽  
pp. 1-20 ◽  
Author(s):  
Wang Wenquan ◽  
Zhang Lixiang ◽  
Yan Yan ◽  
Guo Yakun
Keyword(s):  
Finite Element ◽  
Turbulent Flow ◽  
Turbulent Flows ◽  
Stokes Equations ◽  
Three Dimensional ◽  
Turbulent Channel Flow ◽  
Francis Turbine ◽  
Complex Geometries ◽  
Subgrid Scale ◽  
Element Analysis

An innovative computational model is presented for the large eddy simulation (LES) of multidimensional unsteady turbulent flow problems in complex geometries. The main objectives of this research are to know more about the structure of turbulent flows, to identify their three-dimensional characteristic, and to study physical effects due to complex fluid flow. The filtered Navier-Stokes equations are used to simulate large scales; however, they are supplemented by dynamic subgrid-scale (DSGS) models to simulate the energy transfer from large scales toward subgrid-scales, where this energy will be dissipated by molecular viscosity. Based on the Taylor-Galerkin schemes for the convection-diffusion problems, this model is implemented in a three-dimensional finite element code using a three-step finite element method (FEM). Turbulent channel flow and flow over a backward-facing step are considered as a benchmark for validating the methodology by comparing with the direct numerical simulation (DNS) results or experimental data. Also, qualitative and quantitative aspects of three-dimensional complex turbulent flow in a strong 3D blade passage of a Francis turbine are analyzed.

Dynamic Global Model for Large Eddy Simulation in Complex Geometries

2011 ◽  
Vol 261-263 ◽  
pp. 837-841
Author(s):  
Wen Quan Wang ◽  
Yan Yan
Keyword(s):  
Large Eddy Simulation ◽  
Turbulent Flow ◽  
Viscous Dissipation ◽  
Global Model ◽  
Complex Geometries ◽  
Subgrid Scale ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Model Coefficient ◽  
Global Equilibrium

In the present study, the dynamic Vreman model based on the global equilibrium between the subgrid-scale dissipation and the viscous dissipation with a global model coefficient are applied to large eddy simulation of turbulent flow in complex geometries. Distributions of pressure, velocity and vorticity as well as some flow structure are gained, which is helpful to examine the performance of SGS model and understand the flow characters in complex geometries.

scholarly journals The tetrahedral finite cell method for fluids: Immersogeometric analysis of turbulent flow around complex geometries

2016 ◽  
Vol 141 ◽  
pp. 135-154 ◽  
Author(s):  
Fei Xu ◽  
Dominik Schillinger ◽  
David Kamensky ◽  
Vasco Varduhn ◽  
Chenglong Wang ◽  
...  
Keyword(s):  
Turbulent Flow ◽  
Complex Geometries ◽  
Finite Cell Method ◽  
Cell Method ◽  
Finite Cell

A calculation procedure for turbulent flow in complex geometries

1987 ◽  
Vol 15 (3) ◽  
pp. 251-273 ◽  
Author(s):  
I. Demirdzic ◽  
A.D. Gosman ◽  
R.I. Issa ◽  
M. Peric
Keyword(s):  
Turbulent Flow ◽  
Calculation Procedure ◽  
Complex Geometries
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