Visualisasi Aliran Turbulen yang Melintasi Vertical Forward Facing Step Melalui Pendekatan CFD

Luthfi Hakim(1*)

(1) Program Studi Teknik Mesin
(*) Corresponding Author

Sari


Pada penelitian ini, visualisasi aliran yang melintasi vertical forward facing step akan diteliti melalui pendekatan secara simulasi. Simulasi dilakukan untuk melihat pengaruh bilangan Reynolds terhadap karakterik aliran yang melintasi Vertical Forward Facing Step secara 2D. Kecepatan udara yang masuk melalui upstream ditentukan sebesar 1 ms-1 dan 10 ms-1 dengan tiga model viscous yaitu: (1) Spalart-allmaras (2) k-epsilon standard (3) k-omega standard. Hasil simulasi menunjukan berbedaan bentuk profil kecepatan antara 3 model turbulensi yang digunakan, terutama terlihat pada posisi x/H=3 dan x/H=3 dan melalui profil kecepatan. Hasil yang mendekati antara model turbulensi k-epsilon standard dengan k-omega standard namun berbeda dengan model turbulensi Spalart-allmaras.

Teks Lengkap:

PDF

Referensi


J. Y. Kim, A. J. Ghajar, C. Tang, and G. L. Foutch, “Comparison of near-wall treatment methods for high Reynolds number backward-facing step flow,” Int. J. Comut. Fluid Dyn., vol. 19, no. 7, pp. 493–500, 2005, doi: 10.1080/10618560500502519.

D. M. Driver and H. L. Seegmiller, “Features of a reattaching turbulent shear layer in divergent channel flow,” AIAA J., vol. 23, no. 2, pp. 163–171, 1985, doi: 10.2514/3.8890.

H. Ronellenfitsch and E. Katifori, “Phenotypes of Fluctuating Flow: Development of Distribution Networks in Biology and Trade-offs between Efficiency, Cost, and Resilience,” vol. 1707, 2017, doi: 10.13140/RG.2.2.28668.64646.

M. Skovgaard and P. V Nielsen, “Numerical Investigation of Transitional Flow Over a Backward Facing Step Using a Low Reynolds Number,” 12th AIVC-Conference Air Mov. Control within Build., 1991.

P. Araujo, A. L. Tenório Rezende, and F. Alcântara Soares, “Numerical Simulation of Turbulent Flow Over a Forward-Facing Step,” no. May, 2018, doi: 10.26678/abcm.cobem2017.cob17-0385.

E. E. Essel, A. Nematollahi, E. W. Thacher, and M. F. Tachie, “Effects of upstream roughness and Reynolds number on separated and reattached turbulent flow,” J. Turbul., vol. 16, no. 9, pp. 872–899, 2015, doi: 10.1080/14685248.2015.1033060.

C. X. Zhang, “Numerical predictions of turbulent recirculating flows with a κ-ϵ model,” J. Wind Eng. Ind. Aerodyn., vol. 51, no. 2, pp. 177–201, 1994, doi: 10.1016/0167-6105(94)90003-5.

N. Gasset, G. J. Poitras, Y. Gagnon, and C. Brothers, “Study of atmospheric boundary layer flows over a coastal cliff,” Wind Eng., vol. 29, no. 1, pp. 3–24, 2005, doi: 10.1260/0309524054353719.

Y. Addad, D. Laurence, C. Talotte, and M. C. Jacob, “Large eddy simulation of a forward-backward facing step for acoustic source identification,” Int. J. Heat Fluid Flow, vol. 24, no. 4, pp. 562–571, 2003, doi: 10.1016/S0142-727X(03)00050-X.

H. Hattori and Y. Nagano, “Investigation of turbulent boundary layer over forward-facing step via direct numerical simulation,” Int. J. Heat Fluid Flow, vol. 31, no. 3, pp. 284–294, 2010, doi: 10.1016/j.ijheatfluidflow.2010.02.027.




DOI: http://dx.doi.org/10.31602/al-jazari.v5i2.10312

Refbacks

  • Saat ini tidak ada refbacks.


This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.