Computation of Mean Flow and Thermal Characteristics of Incompressible Turbulent Offset Jet Flows

Vishnuvardhanarao, E.; Das, Manab Kumar

doi:10.1080/10407780701715760

Cited by 37 publications

(27 citation statements)

References 19 publications

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“…KUMAR and impingement regions (results are not shown here). Similar observations have also been noted by Vishnuvardhanrao and Das [24] for an offset jet. However, turbulent kinetic energy is maximal near the merge point in the case of a dual jet.…”

supporting

confidence: 80%

“…This offset jet was heated, and it impinged onto an adiabatic wall. Thereafter, the thermal characteristics of an offset jet were extensively studied numerically by Vishunuvardhanrao and Das [24,37,38]. They also studied the effect of the thickness of the impinging wall on heat transfer characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…The jet, after impinging on the wall, changes direction and further downstream behaves like a wall jet. There is a dearth of literature on the planar offset jet [3,[16][17][18][19][20][21][22][23][24][25]. The experimental studies on this topic were carried out using pressure tap [16,19], single hot wire [19], Prandtl-type pitot static tube [26], the one-component Laser Doppler Anemometer (LDA) system [22,21], and the two-component LDA system [3].…”

Section: Introductionmentioning

confidence: 99%

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Mean Flow and Thermal Characteristics of a Turbulent Dual Jet Consisting of a Plane Wall Jet and a Parallel Offset Jet

Kumar

2015

Numerical Heat Transfer, Part A: Applications

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The standard high-Reynolds number two-equation k À e model is used to study the flow and thermal characteristics of a dual jet consisting of a plain wall turbulent jet and a parallel turbulent offset jet (hereafter, dual jet). The flow and thermal characteristics are presented in the form of streamlines, mean velocity vector, turbulent kinetic energy, dissipation of turbulent energy, Reynolds stresses, and isothermal contour plots. The variation in local heat flux and local Nusselt number on the bottom wall is also presented. The finite-volumemethod-based SIMPLE algorithm is utilized for understanding the complex nature of flow arising due to a dual jet. The convective flux is discretized using the power-law upwind scheme, while the diffusive term is discretized using the central difference scheme. To study the effect of offset ratio, which is defined as the ratio of height of the jet from the horizontal wall to the width of the jet (nozzle), it is varied between 3 and 15 at an interval of 2. It is noted that the presence of a wall jet in addition to the parallel offset jet has a significant effect on flow and thermal characteristics.

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supporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mean Flow and Thermal Characteristics of a Turbulent Dual Jet Consisting of a Plane Wall Jet and a Parallel Offset Jet

Kumar

2015

Numerical Heat Transfer, Part A: Applications

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“…The assumption of a two-dimensional flow in turbulent conditions has been theoretically justified for some decades with applications to: heat transfer [31], pulsed jet [32], offset jet flow [33], jet flow of a nanofluid in a converging duct [34], meteorology and magneto-hydrodynamics [35]. Some two-dimensional Direct Numerical Simulations (DNS) [36][37] and Large Eddy Simulations (LES) [38][39][40][41][42][43] have been conducted to study the fluid dynamics of submerged jets, but in none of them the URF has been observed.…”

Section: Introductionmentioning

confidence: 99%

Numerical evidence of an undisturbed region of flow in a turbulent rectangular submerged free jet

Boghi

Angelino

Gori

2016

Numerical Heat Transfer, Part A: Applications

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“…The work of Vishnuvardhanarao and Das (2008a, 2008b) and Song et al (2000) examined the characteristics of conjugate heat transfer of a two-dimensional, steady and incompressible offset jet flow. They show that the local Nusselt number is maximum at the reattachment point and reduces with the offset ratio.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of an offset jet with different velocity and offset ratios

Assoudi

Habli

Saïd

et al. 2015

Engineering Applications of Computational Fluid Mechanics

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The present study examines the configuration of an offset jet issuing into either a quiescent medium or a moving stream (co-flowing). The mean velocity and turbulence characteristics of the turbulent offset jet have been investigated using a particle image velocimetry technique at three velocity ratios and for two offset ratios. A numerical simulation of a threedimensional offset jet has also been carried out by comparing the corresponding results with previous experimental data and our measurements. The numerical investigation was performed by means of the finite volume method together with a second-order turbulent closure model -the Reynolds stress model (RSM) -to examine the behavior of the flow for different velocity ratio and offset ratios. Results give a satisfactory agreement between the experimental data and the calculations. Data from the early flow region clearly show a significant influence of the velocity ratio and the offset ratio on the mean flow and turbulence characteristics.

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Computation of Mean Flow and Thermal Characteristics of Incompressible Turbulent Offset Jet Flows

Cited by 37 publications

References 19 publications

Mean Flow and Thermal Characteristics of a Turbulent Dual Jet Consisting of a Plane Wall Jet and a Parallel Offset Jet

Mean Flow and Thermal Characteristics of a Turbulent Dual Jet Consisting of a Plane Wall Jet and a Parallel Offset Jet

Numerical evidence of an undisturbed region of flow in a turbulent rectangular submerged free jet

Experimental and numerical study of an offset jet with different velocity and offset ratios

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