• Vol 7, No 8 (2016)
  • Mechanical Engineering

Turbulence Model and Validation of Air Flow in Wind Tunnel

Gun Gun Ramdlan G., Ahmad Indra Siswantara, Budiarso , Asyari Daryus, Hariyotejo Pujowidodo


Publish at : 30 Dec 2016 - 00:00
IJtech : IJtech Vol 7, No 8 (2016)
DOI : https://doi.org/10.14716/ijtech.v7i8.6891

Cite this article as:
G., G.G.R.., & Siswantara, A.I..Budiarso., & Daryus, A..Pujowidodo, H.., 2016. Turbulence Model and Validation of Air Flow in Wind Tunnel. International Journal of Technology. Volume 7(8), pp.1362-1372
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Gun Gun Ramdlan G. Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia. Department of Mechanical Engineering, Politeknik Negeri Jakarta, Depok 16
Ahmad Indra Siswantara Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
Budiarso Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
Asyari Daryus Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia. Department of Mechanical Engineering, Universitas Darma Persada, Jl. Radi
Hariyotejo Pujowidodo Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
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Abstract

As an initial analysis, numerical simulation has more advantages in saving time and costs regarding experiments. For example, variations in flow conditions and geometry can be adjusted easily to obtain results. Computational fluid dynamics (CFD) methods, such as the k-? model, renormalization group (RNG) k-? model and reynolds stress model (RSM), are widely used to conduct research on different objects and conditions. Choosing the appropriate model helps produce and develop constant values. Modeling studies as appropriate, i.e., in the turbulent flow simulation in the wind tunnel, is done to get a more accurate result. This study was conducted by comparing the results of the simulation k-? model, RNG k-? model and RSM, which is validated by the test results. The air had a density of 1,205 kg/m3, a viscosity of 4×10-5 m2/s and a normal speed of 6 m/s. By comparing the simulation results of the k-? model, RNG k-? model and RSM, which is validated by the test results, the third turbulence model provided good results to predict the distribution of speed and pressure of the fluid flow in the wind tunnel. As for predicting the turbulent kinetic energy, turbulent dissipation rate and turbulent effective viscosity, the k-? model was effectively used with comparable results to the RSM models.

k-? model; Reynolds Stress Model (RSM); RNG k-? model; Turbulent flow; Turbulence Model