Mean flow characteristics of a turbulent dual jet consisting of a plane wall jet and a parallel offset jet

Kumar, Amitesh

doi:10.1016/j.compfluid.2015.02.017

Cited by 36 publications

(28 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The standard − model was considered to be useful when applied to offset jet flow, Mondal et al [20], Kumar [21], and Mondal et al [22]. In addition, Assoudi (2015) believed that the standard − model is more appropriate for the prediction of the turbulent offset jet with small offset ratio (the offset ratio is 0.8 in this paper).…”

Section: Governing Equationsmentioning

confidence: 98%

Numerical Simulation of an Offset Jet in Bounded Pool with Deflection Wall

Wang

Zhang

2017

Mathematical Problems in Engineering

View full text Add to dashboard Cite

The k-ε turbulent model and VOF methods were used to simulate the three-dimensional turbulence jet. Numerical simulations were carried out for three different kinds of jets in a bounded pool with the deflection wall with angles of 0°, 3°, 6°, and 9°. The numerical simulation agrees well with the experimental data. The studies show that the length of the potential core zone increases with the increase of the deflection angle. The velocity distribution is consistent with the Gaussian distribution and almost not affected by the deflection angle in potential core zone. The decay rates of flow velocity in the transition zone are 1.195, 1.281, 1.439, and 1.532 corresponding to the unilateral deflection angles, 0°, 3°, 6°, and 9°, respectively. The decay rates of velocity in the transition zone are 1.928 and 2.835 corresponding to the bilateral deflection angles 3° and 6°. It is also found that the spread of velocity is stronger in the vertical direction as the deflection angles become smaller. The spread rates of velocity with unilateral deflection wall are higher than those with bilateral deflection walls in the horizontal plane in the pool.

show abstract

Section: Governing Equationsmentioning

confidence: 98%

Numerical Simulation of an Offset Jet in Bounded Pool with Deflection Wall

Wang

Zhang

2017

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…The geometric configuration ( Fig. 1) of combined wall and offset jet flow (WOJ) realized by Kumar (2015) is used to numerically study the influence of the wall inclination β on the dynamic characteristics of the WOJ flow. The wall jet (denoted LWJ: Lower Wall Jet) and the offset jet (denoted UOJ: Upper Offset Jet) are ejected from twin identical and rectangular nozzles (Fig.…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…However, for nozzles spacing outside this range, twin steady counter rotating vortices are formed along this flow zone. Kumar (2015) was numerically simulated combined wall and offset jets flow for a Reynolds number Re=15000, an offset ratio H=7, a nozzle width d=12.5 mm and a nozzle exit velocity u0 = 17.4m/s. The numerical model validation was performed on the experimental data of Pelfrey and Liburdy (1986) for a single offset jet (SOJ).…”

Section: Introductionmentioning

confidence: 99%

CFD Investigation on the Steady Interaction between an Offset Jet and an Oblique Wall Jet

Hnaien

Marzouk

Kolsi

et al. 2018

JAFM

View full text Add to dashboard Cite

In this paper a CFD investigation on the interaction between an offset jet and an oblique wall jet using twodimensional steady RANS equations is performed. This combination is denoted WOJ (Wall Offset jets). Several turbulence models such as the standard k-ω, SST k-ω, standard k-ε, RNG k-ε and realizable k-ε models are tested in the present study. A parametric study is performed to highlight the wall inclination effect on the WOJ flow maximum velocity decay as well as the shear layers spreading. Comparison between combined wall and offset jet (WOJ) and single offset jet (SOJ) flows is also established. Results show that increasing the wall inclination improves the combined wall and offset jets flow spreading. Furthermore, the outer shear layers spreading, is better than the inner shear layers one. Comparing to the combined wall and offset jet flow (WOJ), a better spreading is found in the case of single offset jet flow (SOJ).

show abstract

“…It has various applications in industries as well as the devices which contains flow deflection, cooling of gas turbines, combustion chamber, an automobile demister, mixing process in boiler combustion chambers, heat exchangers, engine carburetor systems, aircrafts ventilation, air-conditioning systems, etc. [1][2][3]. The turbulent jet is mainly classified into a free jet, wall jet, offset jet, dual jet which depends on the placement of jet.…”

Section: Introductionmentioning

confidence: 99%

Effect of Wall Heat Flux on Fluid Flow and Thermal Characteristics of a Turbulent Dual Jet

Kumar¹,

Biswal²,

Gupta³

et al. 2020

MMEP

View full text Add to dashboard Cite

In this study, the two-dimensional, incompressible numerical analysis is carried out to understand the turbulent fluid flow physics and thermal characteristics of a dual jet consisting of a wall jet and a parallel offset jet using standard k-RNG turbulence model. The study is carried out to compare the flow and thermal features of the dual jet for an offset ratio of 3, 7 and 9 at different Reynolds numbers in the range of 5,000 to 20,000. The results of the flow field and turbulent behavior of a dual jet are illustrated in the form of temperature contours, velocity vectors, streamlines, and turbulent kinetic energy at different Reynolds number and offset ratio. The effect of offset ratio and Reynolds number on recirculation region and intensity of upper and lower vortices are discussed in detail. The velocity variation along the axial and vertical direction are also discussed.

show abstract

Mean flow characteristics of a turbulent dual jet consisting of a plane wall jet and a parallel offset jet

Cited by 36 publications

References 36 publications

Numerical Simulation of an Offset Jet in Bounded Pool with Deflection Wall

Numerical Simulation of an Offset Jet in Bounded Pool with Deflection Wall

CFD Investigation on the Steady Interaction between an Offset Jet and an Oblique Wall Jet

Effect of Wall Heat Flux on Fluid Flow and Thermal Characteristics of a Turbulent Dual Jet

Contact Info

Product

Resources

About