1. Combining the strengths of UMIST and The Victoria University of Manchester Laminar Kinetic Energy Models in Code_Saturne Presented by Clare Turner

2. Combining the strengths of UMIST and The Victoria University of Manchester Presentation Outline Progress of the 2 nd model Progress of the 1 st model The first test case Models for implementation Introduction to the problem Summary of actions

3. Combining the strengths of UMIST and The Victoria University of Manchester Industrial Application  Pressure drop in fuel assemblies  Efficiency of combustion process  Turbomachinery  Wind turbine blades Examples: Can be applied to any transition case Original application: rear wing of a Formula 1 car

4. Combining the strengths of UMIST and The Victoria University of Manchester Model Equations – 2005 model Walters-Leylek 2005

5. Combining the strengths of UMIST and The Victoria University of Manchester Model Equations – 2008 model Walters-Cokljat 2008

6. Combining the strengths of UMIST and The Victoria University of Manchester T3 Flat Plate Tests

7. Combining the strengths of UMIST and The Victoria University of Manchester Boundary conditions Inlet conditions: k = 0.0536 m 2 /s 2 ; ε = 1.35 m 2 /s 3 ; U = 5.08 m/s Inlet conditions determined by FSTI curve in STAR-CD

8. Combining the strengths of UMIST and The Victoria University of Manchester The 2005 Model: Initial Results Turbulent profile too low

9. Combining the strengths of UMIST and The Victoria University of Manchester Corrections in the Code (1) Incorrect wall boundary conditions

10. Combining the strengths of UMIST and The Victoria University of Manchester Corrections in the Code (2) Error in the paper for the laminar kinetic energy transport equation The lack of diffusion caused convergence problems

11. Combining the strengths of UMIST and The Victoria University of Manchester Correction of the 2005 Model (1)

12. Combining the strengths of UMIST and The Victoria University of Manchester Corrected Version of the 2005 Model

13. Combining the strengths of UMIST and The Victoria University of Manchester Further Work Required This test case has zero pressure gradient so f ΔP term has been ignored

14. Combining the strengths of UMIST and The Victoria University of Manchester Further Work Required The next test case has a pressure gradient, therefore the change in Ω must be calculated Currently have Ω stored as a common – similar to how S2KW is stored from visklw.F routine Is there a simple way of determining whether the gradient is positive at each cell? Also concerns about adapting to parallel computations

15. Combining the strengths of UMIST and The Victoria University of Manchester Differences Between Models 2005 Model2008 Model

16. Combining the strengths of UMIST and The Victoria University of Manchester The 2008 model: Test

17. Combining the strengths of UMIST and The Victoria University of Manchester Areas For Error From experience, the low profile reflects incorrect ω at the wall Looking at routines which affect this Intending to look at budgets, ω values are smaller than 2005 model

18. Combining the strengths of UMIST and The Victoria University of Manchester Summary Including two k L -k T -ω models (ITURB=61) For the 2004 version require inclusion of f ΔP term – require help! Errors in 2008 model, need to contact authors but also may be problems in routines – have a list of edited routines

19. Combining the strengths of UMIST and The Victoria University of Manchester Any Questions?