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Flow and heat transfer in a pin-fin array

Front Page

Description

Test Case Studies

Evaluation

Best Practice Advice

References

Confined Flows

Underlying Flow Regime 4-18

Abstract

The present configuration has been studied in the framework of the 15th ERCOFTAC-SIG15/IAHR Workshop on Refined Turbulence Modelling which took place in october 2011 at EDF Chatou, France. It deals with the flow through a wall bounded pin matrix in a staggered arrangement with a heated bottom wall. Objectives

The incompressible flow a staggered pin fin array with a pitch to diameter ration of 2.5 and a heated bottom wall in the forced convection regime has been investigated experimentally (Ames et al. 2004, 2006, 2007 and 2008) and computationally by means of LES (Large Eddy Simulation) and URANS (Unsteady Reynolds Averaged Navier Stokes). The results of the computational studies were analysed along with the experimental reference database in the framework of a workshop on “Refined Turbulence Modelling” organized by the ERCOFTAC Special Interest Group on Turbulence Modelling (SIG15). The challenging objective is to predic the right Nusselt number distribution on the the bottom wall.

The primary objectives of the present contribution is twofold:

  • to compare two kind of turbulence approaches (wall resolved LES and wall resolved URANS using two Linear Eddy Viscosity Models and one Reynolds Stress Model)
  • give Best Practice Guidelines to compute the present test-case with a maximum confidence.

Instantaneous Pressure.jpg
Figure 1: Intantaneous view of the pressure field on the pins and the bottom wall (LES, M76, Re=10000)

Streamwise velocity.jpg
Figure 2: Intantaneous view of the stream-wise velocity field (LES, M76, Re=10000)

Instantaneous Temperature Imposed HeatFlux.jpg
Figure 3: Intantaneous view of the temperature field (LES, M76, Re=10000, imposed heat flux)




Contributed by: Sofiane Benhamadouche — EDF

Front Page

Description

Test Case Studies

Evaluation

Best Practice Advice

References


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