Simulation Analysis of Thermal Mixing Characteristics of Fluids Flowing Through a Converging T-junction

Nuruzzaman,; Pao, William; Ya, H. H.; Islam, Ragibul; Adar, Mohammad Ayub; Ejaz, Faheem

doi:10.37934/cfdl.13.9.2841

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…Numerous studies have been conducted to investigate hydrodynamics and mixing characteristics of inline mixers, especially T-type inline mixers, using experimental approaches [7][8][9][10][11]. Utilization of CFD analysis has been proven to improve the understanding of hydrodynamics and mixing phenomena happening inside inline mixers as presented by several previous studies [7,8,[12][13][14][15][16][17]. Based on those works, it can be concluded that different flow parameters influence the hydrodynamic condition in inline mixers, including the angle between the branch and main pipe, diameter ratio, velocity ratio, and mass flow rate.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Hydrodynamics in Inline Mixers

Maulana Gilar Nugraha,

Daffa Dewa Saputra,

Khairullah Ilyas

et al. 2023

CFDL

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The utilization of inline mixers for continuous fluid mixing is a common practice in chemical industries. Information related to hydrodynamics condition in inline mixers is found to be limited while it is crucial for inline mixer type selection. Evaluation of hydrodynamic characteristics in several commercial inline mixers is analyzed in this study, including Y-type, T-type, elbow type, and internal injection mixer types. The analysis is conducted using computational fluid dynamics (CFD) for various Reynolds number conditions from 5,000 to 200,000. Mesh independence tests and model validation with experimental results are performed to ensure simulation accuracy. The CFD results showed that the Y-type mixer type provides the shortest distance i.e., about 12 times diameter. The internal injection type mixer has the most extended hydrodynamic region length to reach a fully-developed region for the same Reynolds number. The highest wall stress is indicated by the injection inline mixer type that located at the outer side wall of the injection pipe. The wall stress at that region is observed to be around twice as large compared to the other mixer type. Meanwhile, the mixer joint in the T-type and Y-type mixers were found to have a wall stress hotspot. Logarithmic correlation formulas were successfully formulated to correlate hydrodynamic region length and Reynolds number for all mixer types. The study results are essential in serving as the basis for inline mixer selection in the industrial sector

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Hydrodynamics in Inline Mixers

Maulana Gilar Nugraha,

Daffa Dewa Saputra,

Khairullah Ilyas

et al. 2023

CFDL

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“…The frequency of temperature fluctuation diminishes as the distance between the mixing outlet and the mixing chamber rises, and thermal mixing increases. [13] 2 A validation study of the aerodynamic behaviour of a wind turbine: Threedimensional rotational case…”

Section: Introductionmentioning

confidence: 99%

Involving Particle Technology in Computational Fluid Dynamics Research: A Bibliometric Analysis

Asep Bayu Dani Nandiyanto,

Risti Ragadhita,

Muhammad Aziz

2023

CFDL

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This research was conducted to determine (i) the growth in the number of scientific publications in the field of particle technology in computational fluid dynamics (CFD), (ii) top citations based on the number of citations, publisher, and country, (iii) visualization of the most productive author, and (iv) publication development map based on keywords. This research method is a descriptive quantitative with bibliometric analysis using Publish or Perish software to harvest data and VOSviewer to visualize related research terms. Data was collected by searching using the Google Scholar database with the keywords “particle technology” and “Computational Fluid Dynamics” from 2019 to 2023. The results showed the growth of scientific publications in the field of particle technology in CFD. The most researched subjects in CFD are “technology,” “CFD analysis,” “fine particles,” and “experimental validation,” which are based on overlay and density visualization. The interrelationships between topics are grouped into four clusters with excellent network visualization. This research is expected to assist researchers in determining the topics to be studied and can also be a reference for further research.

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“…Many other thermal implications of multiphase flow include forced convection of flows in bifurcation channels (Selimefendigil et al , 2021, 2019). The leading research areas related to this field are the thermal mixing characteristics of fluid flow in the T-junction (Nuruzzaman et al , 2021b, 2021a), hybrid nanofluid convection in bifurcation channels and modeling by using hybrid computational fluid dynamics (CFD) (Kolsi et al , 2021; Selimefendigil and Öztop, 2021). T-junction prominently reduces excessive liquid carryovers projected on downstream equipment (Azzi et al , 2010; Liang et al , 2016; Yang et al , 2017).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation and prediction of phase separation in diverging T-junction

Ejaz

Pao

Ali

2022

HFF

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Purpose In plethora of petroleum, chemical and heat transfer applications, T-junction is often used to partially separate gas from other fluids, to reduce work burden on other separating equipment. The abundance of liquid carryovers from the T-junction side arm is the cause of production downtime in terms of frequent tripping of downstream equipment train. Literature review revealed that regular and reduced T-junctions either have high peak liquid carryovers (PLCs) or the liquid appears early in the side arm [liquid carryover threshold (LCT)]. The purpose of this study is to harvest the useful features of regular and reduced T-junction and analyze diverging T-junction having upstream and downstream pipes. Design/methodology/approach Volume of fluid as a multiphase model, available in ANSYS Fluent, was used to simulate air–water slug flow in five diverging T-junctions for eight distinct velocity ratios. PLCs and LCT were chosen as key performance indices. Findings The results indicated that T (0.5–1) and (0.8–1) performed better as low liquid carryovers and high LCT were achieved having separation efficiencies of 96% and 94.5%, respectively. These two diverging T-junctions had significantly lower PLCs and high LCT when compared to other three T-junctions. Results showed that the sudden reduction in the side arm diameter results in high liquid carryovers and lower LCT. Low water and air superficial velocities tend to have low PLC and high LCT. Research limitations/implications This study involved working fluids air and water but applies to other types of fluids as well. Practical implications The novel T-junction design introduced in this study has significantly higher LCT and lower PLC. This is an indication of higher phase separation performance as compared to other types of T-junctions. Because of lower liquid take-offs, there will be less frequent downstream equipment tripping resulting in lower maintenance costs. Empirical correlations presented in this study can predict fraction of gas and liquid in the side arm without having to repeat the experiment. Social implications Maintenance costs and production downtime can be significantly reduced with the implication of diverging T-junction design. Originality/value The presented study revealed that the diameter ratio has a significant impact on PLC and LCT. It can be concluded that novel T-junction designs, T2 and T3, achieved high phase separation; therefore, it is favorable to use in the industry. Furthermore, a few limitations in terms of diameter ratio are also discussed in detail.

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Simulation Analysis of Thermal Mixing Characteristics of Fluids Flowing Through a Converging T-junction

Cited by 6 publications

References 33 publications

Numerical Investigation of Hydrodynamics in Inline Mixers

Numerical Investigation of Hydrodynamics in Inline Mixers

Involving Particle Technology in Computational Fluid Dynamics Research: A Bibliometric Analysis

Numerical investigation and prediction of phase separation in diverging T-junction

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