Computational fluid dynamics simulation of the turbulence models in the tested section on wind tunnel

Ismail, Ismail; John, Johanis; Pane, Erlanda Augupta; Suyitno, Budhi M.; Rahayu, Gama H.N.N.; Rhakasywi, Damora; Suwandi, Agri

doi:10.1016/j.asej.2020.02.012

Cited by 27 publications

(21 citation statements)

References 20 publications

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“…It simulates closer to real conditions flows, as well as curtails the errors via tolerances. Variety of parameters such as velocity, turbulence intensity, distribution of fluid flow, pressure distribution could be obtained via CFD [3].…”

Section: Cfd Involved and Turbulence Modelsmentioning

confidence: 99%

“…It is proposed and is robust enough to predict airflow away from wall/surface and calculates factor turbulence kinetic energy 'k' (energy transport) and dissipation energy (rate) 'ε' using Boussinesq hypothesis. [2,3] k-ω (K-omega)…”

Section: K-ε (K-epsilon)mentioning

confidence: 99%

“…Another common two-equation turbulence model used to solve closure issue. It tries to predict turbulence using 2 partial differentials for 2 variables: k (turbulence kinetic energy) and ω (specific rate of dissipation of k into internal thermal energy and ω≈ε/k) [3,124]. It possess the ability for predicting airflow nearer to wall or surface, and calculating freestream value, moreover, offers accuracy in predicting free shear flows.…”

Section: K-ε (K-epsilon)mentioning

confidence: 99%

“…It possess the ability for predicting airflow nearer to wall or surface, and calculating freestream value, moreover, offers accuracy in predicting free shear flows. [3]…”

Section: K-ε (K-epsilon)mentioning

confidence: 99%

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Modeling and Wind Flow Analysis of an Eiffel (Open) Type Sub-Sonic Wind Tunnel

Namirian¹,

Mathure²,

Thorat³

et al. 2021

GJRE

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Wind tunnel (WT) is a device that artificially produces airflow relative to a stationary body and measures aerodynamic force and pressure distribution, simulating the actual conditions with an important aspect of accurately feigning¬ the full complexity of fluid flow. The aim of the present study is to design the three dimensional geometry of a small, open-circuit (also known as Eiffel Type), and subsonic (low speed) wind tunnel (WT) capable of demonstrating or acting as a vital tool in aero-mechanics research. The project and fabrication itself, poses as an onerous task with the cynosure/central theme being the delineation/depiction of wind tunnel components such as Test Section, contraction cone, diffuser, drive system and settling chamber.

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Section: Cfd Involved and Turbulence Modelsmentioning

confidence: 99%

Section: K-ε (K-epsilon)mentioning

confidence: 99%

Section: K-ε (K-epsilon)mentioning

confidence: 99%

“…It possess the ability for predicting airflow nearer to wall or surface, and calculating freestream value, moreover, offers accuracy in predicting free shear flows. [3]…”

Section: K-ε (K-epsilon)mentioning

confidence: 99%

See 2 more Smart Citations

Modeling and Wind Flow Analysis of an Eiffel (Open) Type Sub-Sonic Wind Tunnel

Namirian¹,

Mathure²,

Thorat³

et al. 2021

GJRE

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“…Firstly, the theory of fluid mechanics is used to establish a mathematical model of turbulence and explain the operation mechanism of the wind field. Ismail et al [ 11 ] established a calculation model for the turbulent flow stage with wind tunnel experiments. Similarly, Letchford et al [ 12 ] conducted theoretical analysis and mathematical modelling of wind loads on the sign boards to simulate the wind load in the natural environment.…”

Section: Introductionmentioning

confidence: 99%

CFD simulation study on wind load of perforated traffic sign board

Zeng

et al. 2020

PLoS ONE

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Traffic sign boards are often blown away by strong winds, seriously endangering the safety of vehicles and pedestrians. To increase their resistance to strong winds, sign boards are perforated. Using computational fluid dynamics simulations, the wind load resistance of traffic signs with holes was optimised. By comparing the solutions to different turbulence models with empirical results, it was found that the simulation results of the re-normalisation group (RNG) model have the smallest error. Therefore, the RNG model is used to simulate the wind load of traffic sign boards with different perforation diameters and different hole spacings under different wind speeds. By analysing the wind pressure distribution on the surface of the perforated traffic sign board, the perforation scheme for different regions of the sign board under different wind loads was obtained. The results show that reasonable perforation diameters and hole spacings can reduce the wind load and improve the wind load resistance of sign boards. This study provides decision-makers with useful information for installing traffic signs in areas affected with strong winds, thereby improving the wind resistance of traffic signs and ensuring traffic safety.

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