&lt;b&gt;Evaluation of CFD simulations with wind tunnel experiments: pressure coefficients at openings in sawtooth building

Lukiantchuki, Marieli Azoia; Shimomura, Alessandra Rodrigues Prata; Silva, Fernando Marques da; Caram, Rosana

doi:10.4025/actascitechnol.v40i1.37537

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…The accuracy of simulation results may vary depending on the phenomenon being observed. For instance when comparing fluid dynamics (CFD) simulations, with data from an inductively coupled plasma generator at atmospheric pressure a deviation of approximately 7 -8% was observed [13]. Similarly when comparing CFD simulations with wind tunnel experiments for openings in a sawtooth building a deviation of around 10% was found [14].…”

Section: Validationmentioning

confidence: 99%

Effect of Variation of Angle of Attack on Lift and Drag Coefficient of Flat Plate Wing on Flying Inflatable Boat

Nafroni,

Riyandwita,

Adripta

2023

Proceedings of the International Conference on Sustainable Engineering, Infrastructure and Development, ICO-SEID 2022, 23-24 No

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The use of Flying Inflatable Boat (FIB) vehicles has caught the attention in applications like search and rescue operations, military surveillance, and recreational activities. The aerodynamics of flat wings of FIB needs to investigate so that the performance, safety and efficiency vehicles can be improved. Changes in angle of attack, velocity, and air density affect lift and drag coefficients are evaluated using Computational Fluid Dynamics (CFD) analysis. Results show that the lift coefficient increases until an angle of attack of 34° meanwhile the ratio of 𝐶 𝐿 /𝐶 𝐷 is increased up to angle of 5°. However, as the angle of attack (AOA) continues to increase the drag coefficient also rises. It is also found that both the lift coefficient and 𝐶 𝐿 /𝐶 𝐷 ratio increase as the velocity goes up. Additionally, decrease of lift coefficient and 𝐶 𝐿 /𝐶 𝐷 ratio accompanied by an increase in drag coefficient is observed as air density decreases.

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Section: Validationmentioning

confidence: 99%

Effect of Variation of Angle of Attack on Lift and Drag Coefficient of Flat Plate Wing on Flying Inflatable Boat

Nafroni,

Riyandwita,

Adripta

2023

Proceedings of the International Conference on Sustainable Engineering, Infrastructure and Development, ICO-SEID 2022, 23-24 No

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“…Furthermore, standard wall functions were assigned for the ground and building surfaces, and the near-wall velocity profiles were modeled so that a transition between the fully turbulent area and the region near the wall is considered due to the turbulence models requiring complementary information in the near-wall region [101]. The non-dimensional parameter y+ that describes the treatment near the walls was measured in 58, which is within the best practice interval from 30 to 300 for k-ε turbulence model [102,103]. A zero-static pressure (fixedValue) was applied at the outlet plane, also assigned with a velocity inlet/outlet type.…”

Section: Mesh Processing and Boundary Conditionsmentioning

confidence: 99%

Using CFD to Evaluate Natural Ventilation through a 3D Parametric Modeling Approach

et al. 2021

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Predicting building air change rates is a challenge for designers seeking to deal with natural ventilation, a more and more popular passive strategy. Among the methods available for this task, computational fluid dynamics (CFD) appears the most compelling, in ascending use. However, CFD simulations require a range of settings and skills that inhibit its wide application. With the primary goal of providing a pragmatic CFD application to promote wind-driven ventilation assessments at the design phase, this paper presents a study that investigates natural ventilation integrating 3D parametric modeling and CFD. From pre- to post-processing, the workflow addresses all simulation steps: geometry and weather definition, including incident wind directions, a model set up, control, results’ edition, and visualization. Both indoor air velocities and air change rates (ACH) were calculated within the procedure, which used a test house and air measurements as a reference. The study explores alternatives in the 3D design platform’s frame to display and compute ACH and parametrically generate surfaces where air velocities are computed. The paper also discusses the effectiveness of the reference building’s natural ventilation by analyzing the CFD outputs. The proposed approach assists the practical use of CFD by designers, providing detailed information about the numerical model, as well as enabling the means to generate the cases, visualize, and post-process the results.

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Development of operable modular louvers Sited in a single-sided ventilated room through 3D parametric optimization

Aalami,

Maqsood,

Bhuiyan

et al. 2024

Building and Environment

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<b>Evaluation of CFD simulations with wind tunnel experiments: pressure coefficients at openings in sawtooth building

Cited by 6 publications

References 19 publications

Effect of Variation of Angle of Attack on Lift and Drag Coefficient of Flat Plate Wing on Flying Inflatable Boat

Effect of Variation of Angle of Attack on Lift and Drag Coefficient of Flat Plate Wing on Flying Inflatable Boat

Using CFD to Evaluate Natural Ventilation through a 3D Parametric Modeling Approach

Development of operable modular louvers Sited in a single-sided ventilated room through 3D parametric optimization

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