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Applications of FLUENT - Two Flow Modeling Examples

Applications of FLUENT - Two Flow Modeling Examples. By Jean Wang, Ph. D. May 13, 2005 Northern HPC Spring Conference. FLUENT?. Fluent is a commercial computational fluid dynamics (CFD) software.

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Applications of FLUENT - Two Flow Modeling Examples

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  1. Applications of FLUENT - Two Flow Modeling Examples By Jean Wang, Ph. D. May 13, 2005 Northern HPC Spring Conference

  2. FLUENT? • Fluent is a commercial computational fluid dynamics (CFD) software. • It could be used for simulation, visualization, and analysis of fluid flow, heat and mass transfer, and chemical reactions. • Industries that use Fluent CFD includes aerospace, automotive, electronics cooling, healthcare, chemical process etc.

  3. Numerical Approach • Grids was generated by GAMBIT, a preprocessor of Fluent. Both Quadrilateral cells and triangular cells were used. • Variety of turbulence models have been used in the simulations including Spalart-Allmaras turbulence model, five equation Reynolds Stress Model and LES. • Fluent, Tecplot, and FIELDVIEW have been used for data visualization.

  4. Problem Description (case 1): Laminar Flow Through a Staggered Tube Bank • Solution Domain: Lus=4.875 (m), Ltb=11.691 (m), Lds=23 (m)

  5. Problem Description (case 1): Continue • Staggered Tube Bank Nomenclature: SL=1.2990 (m), ST=1.50 (m), D=1 (m)

  6. Grid for Case 1 • Grid details in part of solution domain: the quadrrilateral cells were used around the tube wall and triangle cells were used in all other region.

  7. Results for Case 1: Isotherms

  8. Results for Case 1 (Continued): Streamlines near the Inlet Region

  9. Results for Case 1 (Continued): Streamlines after the Last Tube

  10. Results for Case 1 (Continued): Streamlines for Re=300

  11. Results for Case 1 (Continued): Wall Shear Distributions on the first four Tubes

  12. Results for Case 1 (Continued): Average Heat Transfer

  13. Results for Case 1 (Continued): Dimensionless Pressure Profiles

  14. Results for Case 1 (Continued): Average Friction Factor

  15. Problem Description (case 2): Flow Through a Smooth Rectangular Open-Channel • The channel is 0.192 m in width, and 0.6 m in length, and the water depth is 0.1 m. • The slope of the channel is 0.001.

  16. Problem Description (case 2, Continued): Flow Through a Smooth Rectangular Open-Channel • D=0.05 m

  17. Results for Case 2: X-Vorticity

  18. Results for Case 2 (Continued): Z-Vorticity

  19. Results for Case 2 (Continued): Streamlines • Flow around spheres (plotted by FIELDVIEW)

  20. Results for Case 2 (Continued): Water Depth • Exp. data: • H1=0.0945 m • V1=0.6 m/s • H2=0.0593 m • V1=1.07 m/s

  21. Results for Case 2 (Continued): Contours of Volume Fraction of Water

  22. Conclusions • Case 1  FLUENT is a state-of-the-art CFD Software. • Case 2  The capability of FLUENT was tested in a multiphase flow. • Reference: Y.Q. Wang, L.A. Penner, and S.J. Ormiston, "Analysis of Laminar Forced Convection of Air for Crossflow in Banks of staggered Tubes", 2000, Numerical Heat Transfer, Part A, Vol. 38, pp. 819-845. Y.Q. Wang, “Laminar Flow Through a Staggered Tube Bank", 2004, Journal of Thermophysics and Heat Transfer, Vol. 18, pp. 557-559.

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