Classification of turbulent jets in a T-junction area with a 90-deg bend upstream

Hosseini, Seyed Mohammad; Yuki, Kazuhisa; Hashizume, Hidetoshi

doi:10.1016/j.ijheatmasstransfer.2007.08.024

Cited by 50 publications

(10 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This exemplar of thermal mixing has been and is still being extensively studied, both experimentally and numerically, as the work of Naik-Nimbalkar et al (2010) confirms with a rather wide, but not absolutely comprehensive, review of the literature about the subject. Probably the review should be completed by mentioning the experimental work of Hosseini et al(2008) about the classification of the branch jet flow and about the structure of the flow field (Hosseini et al, 2009). Also other publications not included in the aforementioned review, (Muramatsu, 2003, Ogawa et al, 2005, Westin et al, 2008, OECD/NEA, 2011), that are experimental or including an experimental part for validation of a numerical simulation, investigate the bulk flow structures of the mixing in a tee-junction.…”

Section: Thermal Mixing In a Tee-junctionmentioning

confidence: 99%

CFD as a Tool for the Analysis of the Mechanical Integrity of Light Water Nuclear Reactors

Tinoco¹

2013

Nuclear Reactor Thermal Hydraulics and Other Applications

View full text Add to dashboard Cite

Section: Thermal Mixing In a Tee-junctionmentioning

confidence: 99%

CFD as a Tool for the Analysis of the Mechanical Integrity of Light Water Nuclear Reactors

Tinoco¹

2013

Nuclear Reactor Thermal Hydraulics and Other Applications

View full text Add to dashboard Cite

“…These patterns depend on the degree of penetration of the jet into the main flow stream. Hosseini et al [10] presented an experimental model including the T-junction with a 90˚ bend. They analyzed the mixing phenomenon based on the real operating design of the Phoenix reactor.…”

Section: Introductionmentioning

confidence: 99%

“…Figures(9) and(10) show mass transfer rate and volume fraction distributions in pipe cross-sections at , , and , respectively,…”

mentioning

confidence: 99%

See 1 more Smart Citation

Numerical Study of Induced Condensation upon Mixing Flows of Water-stream Flow in a Tee-Junction Pipe

Yousef

Hegazy

Saleh

2021

ERJ. Engineering Research Journal

View full text Add to dashboard Cite

Tee-junction is a device used in pipes to transfer, mixing of two dissimilar fluids of different parameters or either same type with varying parameters. The design of the tee-pipe affects its function. The present paper introduces a numerical study of two-phase flow mixing in a T-junction pipe. Water liquid streams in the horizontal main pipe of a T-junction while saturated steam is drawn from the other pipe branch (it lies in a vertical plane). That results in water liquid and steam mixing with steam condensation, and the mixture is directed to exit from the main pipe. The computational model is validated first with the experimental data for a single-phase flow. Two junction angles 90 o and 45 o between the main pipe and branched pipes are utilized for the T-junction. Different mass ratios for water liquid and steam are examined in the main pipe and branched pipes. Also, various turbulence models are utilized to select the best suitable model for predicting such flows. The comparison ensured the superiority of the realizable k-ɛ model for the present two-phase flow mixing. The obtained results reveal that the T-junction pipe with a junction angle of 45 o achieves improved operational performance compared to the pipe with the junction angle of 90 o . This result shows that the incline of the branch pipe could induce more heat transfer on the area of the T-junction, which inevitably could condensate more steam from the branch pipe. The T-junction pipe with a 45 o angle can condense all the mixed steam in shorter pipe lengths with lower pressure loss at the same operational conditions compared to the 90 o junction angle pipe. Moreover, for constant mass flow rates in the main and branched pipes, an increase in their diameters results in a remarkable enhancement of steam condensation.

show abstract

“…These temperature fluctuations can lead to cyclical thermal stresses and consequently wall fatigue cracking [2,3]. The intensity of this lack is dependent on the thermal mixing mechanism and the temperature distribution [4]. Accordingly, it is essential to investigate the thermal-hydraulic characteristics for the analyses of piping integrity in T-junctions.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the thermal mixing enhancement in a T-junction pipe

Hekmat

Saharkhiz

Izadpanah

2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

In this paper, three-dimensional numerical simulations are conducted to study the thermal mixing of turbulent flow in a T-junction with hot fluid flowing in the main pipe and cold fluid in the branch. The main objective is to investigate the effects of the axial and cross-injection angles to the main pipe and the branch-to-main flow rate ratio on the turbulent thermal mixing. In this regard, an appropriate mixing index is proposed to evaluate the thermal mixing efficiency. The turbulence model employed in this research is the SST k-ω model that can properly capture the mixing behavior of the flow in the main pipe. The results show that the cross-injection angle can considerably affect the thermal mixing enhancement. However, the effects of injection angles on the thermal mixing at lower flow rate ratios are more significant.

show abstract

Classification of turbulent jets in a T-junction area with a 90-deg bend upstream

Cited by 50 publications

References 2 publications

CFD as a Tool for the Analysis of the Mechanical Integrity of Light Water Nuclear Reactors

CFD as a Tool for the Analysis of the Mechanical Integrity of Light Water Nuclear Reactors

Numerical Study of Induced Condensation upon Mixing Flows of Water-stream Flow in a Tee-Junction Pipe

Investigation on the thermal mixing enhancement in a T-junction pipe

Contact Info

Product

Resources

About