Turbulence and CFD Models.

https://unige.it/en/off.f/2019/ins/36793

Guided tutorials and hands-on sessions

In this page you will find the instructions, supporting material, recorded hands-on sessions, and video instructions of the guided tutorials.

Tutorial 1

2D pipe. Ansys Workbench Workflow.

Hands-on session - Live session

Recorded live session - You need UNIGE credentials

Video tutorials

Complete case setup using Ansys Workbench Workflow

Opening the mesh and setting the case directly in Fluent

Download supporting material

Ansys Workbench Project Fluent case file Geometry image

Tutorial 2

3D pipe. Ansys Workbench Workflow.

Hands-on session - Live session

Recorded live session - You need UNIGE credentials

Video tutorials

Ansys Workbench Workflow - Geometry generation

Ansys Workbench Workflow - Mesh generation

Ansys Workbench Workflow - Case setup in Fluent

Ansys Workbench Workflow - Postprocessing using CFD-post

Case setup in Fluent standalone mode.

Python notebooks

Notebook 1 - Plot of non-dimensional velocity profile - y+ vs u+

Download supporting material

Ansys Workbench Project Fluent case file Geometry image

Tutorial 3

Flow around a circular cylinder - 2D LES simulation.

Hands-on session - Live session

Recorded live session - You need UNIGE credentials

Video tutorials

Geometry generation, mesh generation, case setup, quantitative and qualitative post-processing.

Additional comments on post-processing.

Download supporting material

Ansys Workbench Project Fluent case file

Tutorial 4

Under-relaxation factors, steady simulations, source terms and additional scalar transport equations.

Hands-on session - Live session

Recorded live session - You need UNIGE credentials

Video tutorials

Some theoretical background on under-relaxation factors and how to control steady simulations.Under-relaxation factors. How to add additional scalar equations and source terms in Fluent.

Download supporting material

Fluent case file Problem formulation Supporting theory

Tutorial 5

Fluid flow in a 2D elbow.

Hands-on session - Live session

Recorded live session - You need UNIGE credentials

Video tutorials

Geometry generation. Mesh generation. Case setup in Fluent. Quantitative and qualitative post-processing. Under-relaxation factors. Adaptive mesh refinement.

Download supporting material

Ansys Workbench Project Fluent case file Geometry drawing

Tutorial 6

Fluid flow in a 3D elbow.

Hands-on session - Live session

Recorded live session - You need UNIGE credentials

Video tutorials

Geometry generation. Mesh generation. Case setup in Fluent. Quantitative and qualitative post-processing.

Download supporting material

Ansys Workbench Project Fluent case file
Geometry drawing Geometry in iges format Fluent instructions

Tutorial 7

Turbulent flow past a backward facing step.

Hands-on session - Live session

Recorded live session - You need UNIGE credentials

Video tutorials

Case setup. Quantitative and qualitative post-processing.

Download supporting material

Fluent mesh Additional data

References

Driver, D. M. and Seegmiller, H. L., "Features of Reattaching Turbulent Shear Layer in Divergent Channel Flow," AIAA Journal, Vol. 23, No. 2, Feb 1985, pp. 163-171.

NASA Turbulence Modeling Resource

Tutorial 8

Playground for different RANS models - Incompressible flow over a NACA 0012 airfoil.

Hands-on session - Live session

Recorded live session - You need UNIGE credentials

Video tutorials

Case setup. Quantitative and qualitative post-processing.

Download supporting material

Fluent case Additional data

References

McCroskey, W. J., "A Critical Assessment of Wind Tunnel Results for the NACA 0012 Airfoil," NASA TM 100019, October 1987

Ladson, C. L., "Effects of Independent Variation of Mach and Reynolds Numbers on the Low-Speed Aerodynamic Characteristics of the NACA 0012 Airfoil Section," NASA TM 4074, October 1988

NASA Turbulence Modeling Resource

Tutorial 9

Study of the influence of production limiters.

Hands-on session - Live session

Recorded live session - You need UNIGE credentials

Video tutorials

Case setup. Quantitative and qualitative post-processing.

Download supporting material

Incompressible flow over the airfoil of a wind turbine blade
Fluent mesh

Tutorial 10

Study of the influence of curvature correction.

Hands-on session - Live session

Recorded live session - Curved channel - You need UNIGE credentials

Recorded live session - Static mixer - You need UNIGE credentials

Video tutorials

Curved channel. Case setup. Quantitative and qualitative post-processing.

Static mixer. Case setup. Quantitative and qualitative post-processing.

Download supporting material

Curved channel - 2D case
Fluent mesh Additional data

Static mixer - 3D case
Fluent mesh Drawing CAD Instructions

References

Wattendorf, F.L., "A Study of the Effect of Curvature on Fully Developed Turbulent Flows", PhD Thesis, California Institure of Technology, 1934

Tutorial 11

Transition to turbulence.

Hands-on session - Live session

Recorded live session - You need UNIGE credentials

Video tutorials

Laminar to turbulent transition of boundary layer over a flat plate. Case setup. Quantitative and qualitative post-processing.

Transitional flow over a three-element airfoil. Case setup. Quantitative and qualitative post-processing.

Download supporting material

Laminar to turbulent transition of boundary layer over a flat plate
Fluent case Additional data

Transitional flow over a three-element airfoil
Fluent case Additional data

Tutorial 12

Fully turbulent 2D flat plate.

Hands-on session - Live session

Recorded live session - You need UNIGE credentials

Video tutorials

Case setup. Quantitative and qualitative post-processing.

Download supporting material

Laminar to turbulent transition of boundary layer over a flat plate
Fluent meshes Instructions

References

NASA Turbulence Modeling Resource

Tutorial 13

Data analysis and statistical tools used in turbulence modeling.

Hands-on session - Live session

Recorded live session 1 - You need UNIGE credentials

Recorded live session 2 - You need UNIGE credentials

Video tutorials

Quantitative and qualitative post-processing using Paraview.

Download supporting material

Transitional boundary layer dataset of Lee-Zaki
Dataset

Python notebooks
Basic data analysis Square cylinder data Smoothing data

References

Johns Hopkins Turbulence Databases

Tutorial 14

Post-processing and analysis of turbulent simulations.

Hands-on session - Live session

Recorded live session 1 - You need UNIGE credentials

Recorded live session 2 - You need UNIGE credentials

Video tutorials

Ahmed body case setup. Quantitative and qualitative post-processing.

Download supporting material

Ahmed body
Fluent meshes Instructions CAD files

Turbulent flow past a backward facing step - 3D case
Fluent meshes CAD files

Tutorial 15

SRS simulations of the flow past a square cylinder - LES and DES.

Hands-on session - Live session

Recorded live session 1 - You need UNIGE credentials

Recorded live session 2 - You need UNIGE credentials

Recorded live session 3 - You need UNIGE credentials

Video tutorials

Introduction.

Steady case setup. Interpolation files. Quantitative and qualitative post-processing.

Unsteady case setup. Starting the solution from a steady one. Interpolating fields. Choosing the time-step. Automatic output of the solution. Quantitative and qualitative post-processing.

Post-processing unsteady data with Paraview.

Mesh adaptation within Fluent. More on post-processing with Paraview.

Revisiting post-processing in Fluent. Revisiting interpolation files.

Renaming boundary surfaces in the original mesh. Setting periodic boundary conditions. Reading automatic setting files.

Starting your first LES simulation from scratch.

Download supporting material

Flow past a square cylinder
Fluent meshes Fluent cases Interpolation files Ensight files
Fluent settings Time series Instructions

References

D. A. Lyn and W. Rodi. "The flapping shear layer formed by flow separation from the forward corner of a square cylinder". J. Fluid Mech., 267, pp. 353-376, 1994. Click here to download

D. A. Lyn, S. Einav, W. Rodi, J. H. Park. "A laser-Doppler velocimetry study of ensemble-averaged characteristics of the turbulent near wake of a square cylinder". J. Fluid Mech., 304, pp. 285-319, 1995. Click here to download

D. Durao, M. Heitor, J. Pereira. "Measurements of turbulent and periodic flows around a square cross-section cylinder". Experiments in Fluids, 6, pp. 298-304, 1988. Click here to download

J. Ochoa, N. Fueyo. "Large Eddy Simulation of the flow past a square cylinder". 2004. Click here to download

X. Han, T. Ye, Y. Chen. "Calibration of a new very large eddy simulation (VLES) methodology for turbulent flow simulation." Sci. China Phys. Mech. Astron. 55, pp. 1905–1914. 2012. Click here to download

A. Anton. "Numerical Investigation of Unsteady Flows Using OpenFOAM". Magazine of Hydraulics, Pneumatics, Tribology, Ecology, Sensorics, Mechatronics. No.1, 2016. Click here to download

A. Sohankar, L. Davidson, C. Norberg. "Large Eddy Simulation of Flow Past a Square Cylinder: Comparison of Different Subgrid Scale Models", ASME J. Fluids Engng., Vol. 122, No. 1, pp. 39-47, 2000. Click here to download

email: joel.guerrero@unige.it