Behavior of a Jet Issuing Diagonally Upward into Two-Layer Density-Stratified Fluid in a Cylindrical Tank

Degawa, Tomohiro; Fukue, Shota; Uchiyama, Tomomi; Ishikawa, Akira; Motoyama, Koji

doi:10.4236/jfcmv.2017.53004

Cited by 6 publications

(12 citation statements)

References 7 publications

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“…The simulated concentration distributions in the central vertical cross-section shown in Figures 9-11 agree with the experimentally visualized distributions [7] shown in Figure 3, which demonstrate the validity of the simulation method. …”

Section: Concentration Distribution and Comparison With Experimental supporting

confidence: 73%

“…The authors [7] conducted an experimental study of the behavior of the jet and the resulting mixing phenomena under the same conditions as those in the present simulation. They revealed that the jet behavior relative to the density interface can be classified into three patterns (Pattern A, Pattern B, and Pattern C) according to the value of Re.…”

Section: Computational Conditionmentioning

confidence: 99%

“…This study aims to complement the authors' experimental investigation [7]. It simulates a jet issuing diagonally upward from a nozzle into a two-layer density stratified fluid in a cylindrical tank and the resulting mixing phenomena.…”

Section: Introductionmentioning

confidence: 99%

“…The authors' experimental study [7] captured images of the flow in the central vertical cross-section (y = 0) passing through the jet centerline. Figure 3 shows images for Re = 475, 1426, and 2614, which represent Pattern A, Pattern …”

Section: Computational Conditionmentioning

confidence: 99%

“…To investigate such secondary flow and the resulting mixing phenomena via a laboratory-based experiment, the authors [7] studied the behavior of a jet issuing diagonally upward from a nozzle mounted on the bottom of a cylindrical tank. The upper and lower fluids were water and an aqueous solution of NaCl, respectively, and the lower fluid issued from the nozzle.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Numerical Simulation of Jet Issuing Diagonally Upward into Density-Stratified Fluid in Cylindrical Tank

Degawa¹,

Uchiyama²,

Aozasa³

et al. 2018

JPEE

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This study simulates the behavior of a jet issuing into a two-layer density-stratified fluid in a cylindrical tank and the resulting mixing phenomena. The upper and lower fluids are water and an aqueous solution of sodium chloride (NaCl), respectively, with the lower fluid issuing diagonally upward from a nozzle on the bottom of the tank. The angle between the centerline of the jet and the tank bottom is 60˚. The phenomena when the Reynolds number Re of the jet is 475, 1426, and 2614 are simulated. The mass concentration of the aqueous solution of NaCl is 0.02. The simulation successfully grasps the jet behavior and the resulting mixing, which agree with the authors' experimental results at the corresponding Re value. The secondary flows that appear in the horizontal cross-sections consist of a pair of vortices and flows along the tank wall. The secondary flow at the density interface represents the intrusion of an internal density current, which gives rise to mixing along the interface.

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Section: Concentration Distribution and Comparison With Experimental supporting

confidence: 73%

Section: Computational Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Computational Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical Simulation of Jet Issuing Diagonally Upward into Density-Stratified Fluid in Cylindrical Tank

Degawa¹,

Uchiyama²,

Aozasa³

et al. 2018

JPEE

Self Cite

View full text Add to dashboard Cite

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Mixing of a two-layer density-stratified fluid by two vortex rings successively launched toward the density interface

Cao

Takamure

Degawa

et al. 2021

J Vis

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Mixing of Density-Stratified Fluid in a Cylindrical Tank by a Diagonal Jet

Degawa¹,

Uno²,

Uchiyama³

2018

JEPE

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This study experimentally investigates the mixing of two-layer density-stratified fluid in a cylindrical tank by a diagonal jet. The upper and lower fluids are water and an aqueous solution of sodium chloride (NaCl), respectively, and the lower fluid issues from a nozzle on the tank bottom. The angle between the jet centerline and the tank bottom is 60°, and the mass concentration of the NaCl solution is 0.02. The mixing in cases that the Reynolds numbers of the jets are 713, 2319, and 3565 is investigated. The velocity fields in the central vertical cross-section are measured with a PIV (particle imaging velocimetry) system by tracing nylon particles with the diameter of 80 μm. The concentration fields in the section are visualized using Rhodamine B as the fluorescent dye. They are also measured using PLIF (planer laser induced fluorescence) from visualized images and the progresses of the mixing are evaluated quantitatively. The investigation clarifies the relationship between the mixing phenomena and the Reynolds number of the jet.

show abstract

Behavior of a Jet Issuing Diagonally Upward into Two-Layer Density-Stratified Fluid in a Cylindrical Tank

Cited by 6 publications

References 7 publications

Numerical Simulation of Jet Issuing Diagonally Upward into Density-Stratified Fluid in Cylindrical Tank

Numerical Simulation of Jet Issuing Diagonally Upward into Density-Stratified Fluid in Cylindrical Tank

Mixing of a two-layer density-stratified fluid by two vortex rings successively launched toward the density interface

Mixing of Density-Stratified Fluid in a Cylindrical Tank by a Diagonal Jet

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