UFR 4-18 Best Practice Advice: Difference between revisions
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== Key Physics == | == Key Physics == | ||
{{Demo_UFR_BPA1}} | <!-- {{Demo_UFR_BPA1}} --> | ||
The two key physical phenomena which have to be captured here are: | Our aim in the present test-case is to predict the following physical parameters: | ||
* The vortex shedding around the pins | * The pressure drop across the matrix, | ||
* The average and local Nusselt numbers on the bottom wall. | |||
The temperature transport is reduced to the forced convection regime, thus predicting the dynamics of the flow is the critical issue. | |||
The two key physical phenomena which have then to be captured here are: | |||
* The vortex shedding around the pins, | |||
* The horseshoe vortices due to the interaction between the pins and the endwall. | * The horseshoe vortices due to the interaction between the pins and the endwall. | ||
Revision as of 05:56, 19 May 2015
Flow and heat transfer in a pin-fin array
Confined Flows
Underlying Flow Regime 4-18
Best Practice Advice
Key Physics
Our aim in the present test-case is to predict the following physical parameters:
- The pressure drop across the matrix,
- The average and local Nusselt numbers on the bottom wall.
The temperature transport is reduced to the forced convection regime, thus predicting the dynamics of the flow is the critical issue. The two key physical phenomena which have then to be captured here are:
- The vortex shedding around the pins,
- The horseshoe vortices due to the interaction between the pins and the endwall.
Numerical Modelling
- Discretisation method
- Grids and grid resolution
Physical Modelling
- Turbulence modelling
- Transition modelling
- Near-wall modelling
- Other modelling
Application Uncertainties
Summarise any aspects of the UFR model set-up which are subject to uncertainty and to which the assessment parameters are particularly sensitive (e.g location and nature of transition to turbulence; specification of turbulence quantities at inlet; flow leakage through gaps etc.)
Recommendations for Future Work
Propose further studies which will improve the
quality or scope of the BPA and perhaps bring it up to date. For example,
perhaps further calculations of the test-case should be performed
employing more recent, highly promising models of turbulence (e.g Spalart
and Allmaras, Durbin's v2f, etc.). Or perhaps new experiments should be
undertaken for which the values of key parameters (e.g. pressure gradient
or streamline curvature) are much closer to those encountered in real
application challenges.
Contributed by: Sofiane Benhamadouche — EDF
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