Wall Y+ approach for dealing with turbulent flow through a constant area duct

Shukla, Isha; Tupkari, Swapnil S.; Raman, A.; Mullick, A. N.

doi:10.1063/1.4704213

Cited by 13 publications

(2 citation statements)

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“…There, the model presents an acceptable range between 30 and 300 for the turbulent processes simulation, which is an adequate range for evaluation of the non-dimensional distance [26]. As proposed in [27], the cell size was determined based on the desired values of y + . Unlike the conclusions reached in [27], the wall functions adequately modeled the phenomenon.…”

Section: Near-wall Flow Representationmentioning

confidence: 99%

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2D CFD Modeling of Rapid Water Filling with Air Valves Using OpenFOAM

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Espinoza

et al. 2021

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The rapid filling process in pressurized pipelines has been extensively studied using mathematical models. On the other hand, the application of computational fluid dynamics models has emerged during the last decade, which considers the development of CFD models that simulate the filling of pipes with entrapped air, and without air expulsion. Currently, studies of CFD models representing rapid filling in pipes with entrapped air and with air expulsion are scarce in the literature. In this paper, a two-dimensional model is developed using OpenFOAM software to evaluate the hydraulic performance of the rapid filling process in a hydraulic installation with an air valve, considering different air pocket sizes and pressure impulsion by means of a hydro-pneumatic tank. The two-dimensional CFD model captures the pressure evolution in the air pocket very well with respect to experimental and mathematical model results, and produces improved results with respect to existing mathematical models.

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Section: Near-wall Flow Representationmentioning

confidence: 99%

“…As proposed in [27], the cell size was determined based on the desired values of y + . Unlike the conclusions reached in [27], the wall functions adequately modeled the phenomenon.…”

Section: Near-wall Flow Representationmentioning

confidence: 99%

2D CFD Modeling of Rapid Water Filling with Air Valves Using OpenFOAM

Aguirre-Mendoza

Oyuela

Espinoza

et al. 2021

Water

View full text Add to dashboard Cite

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Urban heat island mitigation via geometric configuration

Aly

Goodlow

Conerly

2022

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Effects of Synthetic Jets on Swirl Inflow in a Variable-Geometry Twin Air-Intake

Yadav,

Paul,

Jain

et al. 2023

Flow Turbulence Combust

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Air intakes are an integral part of contemporary passenger and military aircraft engines. Their impact on aerodynamic performance across the entire flight envelope is critical to aircraft flight safety, efficiency, and manoeuvrability, especially at high Mach numbers due to shock waves. The high demand for reductions in aircraft weight and size and enhancements in durability, comfort, and thermal and radar signatures compel researchers and engineers to explore new designs and develop efficient air intakes for high-performance aircraft engines. Although a number of studies on air intake have been conducted and reported in the open literature, there is little information available in the public domain on bifurcated twin air intakes using synthetic jet. As a result, the primary goal of this research is to use computational fluid dynamics modelling to investigate the effects of synthetic jets on swirl inflow variable geometry twin air intake aerodynamic performance over a range of Reynolds numbers. Some important parameters (distortion coefficient, non-uniformity index, swirl coefficient, and static and total pressure coefficients) were investigated. Both static and total pressure recovery have been increased at all swirl numbers. A significant decrease in distortion coefficient and swirl coefficient has also been achieved, reaching a 53% reduction in the distortion coefficient and a 62% reduction in the swirl coefficient. The reduction in the non-uniformity index is achieved by 62% for the controlled flow case. The findings show that synthetic jets are effective in controlling the flow separation in the twin air intakes and enhancing aerodynamic performance.

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Wall Y+ approach for dealing with turbulent flow through a constant area duct

Cited by 13 publications

References 0 publications

2D CFD Modeling of Rapid Water Filling with Air Valves Using OpenFOAM

2D CFD Modeling of Rapid Water Filling with Air Valves Using OpenFOAM

Urban heat island mitigation via geometric configuration

Effects of Synthetic Jets on Swirl Inflow in a Variable-Geometry Twin Air-Intake

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