Nusselt number correlation for a jacketed stirred tank using computational fluid dynamics

Daza, Silvia Araujo; Prada, Ronald Jaimes; Nunhez, José Roberto; Castilho, Guilherme José de

doi:10.1002/cjce.23385

Cited by 14 publications

(4 citation statements)

References 24 publications

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“…Daza et al generated a CFD model of a jacketed stirred tank equipped with a six-blade Rushton turbine impeller to obtain a Nusselt number correlation due to dependency of the heat transfer coefficient on the impeller and the speed of rotation. The authors stated that the results of the Nussxelt number correlation were in a good agreement with the experimental results obtained from a reliable representation of the heat transfer in the tank (Daza et al, 2019). This type of heat exchangers were also used in Organic Rankine Cycle (ORC) systems.…”

Section: Introductionsupporting

confidence: 59%

Karıştırıcılı Ceket Tip Isı Değiştiricilerin Isıl Davranışlarının Deneysel ve Sayısal Olarak İncelenmesi

BAYRAM,

SEVİLGEN,

CESUR

2023

UUJFE

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In this study, the thermal performance of a jacketed heat exchanger with a stirrer was experimentally and numerically investigated under different jacket side water inlet temperature and flow rate conditions. In the numerical study, a three-dimensional computational fluid dynamics (CFD)model of the heat exchanger was generated and the analyzes were performed with the ANSYS-Fluent software package. In addition, a stirrer was added to both the experimental and the numerical study to obtain the effects of the stirrer on the temperature and velocity values of the water in the tank. It was seen that the results of the analyzes performed under similar conditions to the experimental study were in good agreement with the experimental study. It was concluded that the effect of the flow rate decreases with increasing inlet temperature. When the stirrer was activated and the flow rate was increased from 0.5 to 2.5 l/min in 30, 40, and 50°C inlet temperature conditions, the time to reach the target temperature inside the tank decreased from approximately 1600 to 900, from 2500 to 1350, and from 4900 to 1400, respectively. In general, it was observed that the effect of the stirrer increased with increasing inlet temperature in all flow rate conditions.

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Section: Introductionsupporting

confidence: 59%

Karıştırıcılı Ceket Tip Isı Değiştiricilerin Isıl Davranışlarının Deneysel ve Sayısal Olarak İncelenmesi

BAYRAM,

SEVİLGEN,

CESUR

2023

UUJFE

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“…To account for this dependency, a literature-reported Nusselt number correlation is used (eq ). Typically reported values for the exponents a and b amount to 0.667 and 0.333, respectively, which are valid over different geometries and operating conditions . The constant C 1 needs to be estimated from the data, as the order of magnitude of the heat transfer coefficient is highly dependent on the equipment.…”

Section: Model Construction and Methodology Developmentmentioning

confidence: 99%

Advancing Nitrobenzene Hydrogenation Process Understanding: A Multiscale Modeling Approach using Industrial Pharmaceutical Production Data

Callewaert,

Pessanha,

Lauwaert

et al. 2024

Ind. Eng. Chem. Res.

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The pharmaceutical industry is under increasing pressure to reduce production costs and operate within agile supply chains by leveraging the capabilities that come with integrated data infrastructures and increasing access to various forms of modeling. In contrast to bulk chemical production, pharmaceutical productions typically operate at significantly lower volumes and allow for narrower variability in critical parameters due to tightly defined operating ranges. This makes the data acquired from the process challenging to analyze with statistical methods, but the application of engineering and scientific relations as multiscale models offers a more effective way of leveraging the historical data that are available. In this work, a multiscale reaction model is developed for an exothermic liquid phase hydrogenation of a nitrobenzene functionality in the synthesis of an active pharmaceutical ingredient (API) by using available production data. The developed model successfully described the interplay between reaction kinetics, gas−liquid mass transfer, and heat removal present in the process data, as evident from the simulated versus observed temperature evolution with batch time, which was used as an indirect measurement of the reaction conversion. Moreover, the model was also able to reproduce the temperature profiles in the case of a 30% scale-up. Simulated concentration profiles indicate that the end of the reaction occurs within a much shorter time frame than that prescribed by the process recipe, suggesting that the batch time can be reduced by more than 50%. The results demonstrate the flexibility and predictive power of this type of modeling approach because this model was developed using passive data collection of standard process parameters rather than through a dedicated Design of Experiments (DoE).

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“…They discovered that the heat transfer coefficient values simulated by a CFD program correspond to experimental data that are very congruent. Daza et al 12 numerical investigation of thermal behavior inside jacketed stirred vessel stirred. They acquire a correlation of dimensionless Nusselt number of stirred systems with an introducing six-blade turbine.…”

Section: List Of Symbolsmentioning

confidence: 99%

Investigation of mixing viscoplastic fluid with a modified anchor impeller inside a cylindrical stirred vessel using Casson–Papanastasiou model

Benhanifia

Redouane

Rahmani

et al. 2022

Sci Rep

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In process engineering as chemical and biotechnological industry, agitated vessels are commonly used for various applications; mechanical agitation and mixing are performed to enhance heat transfer and improve specific Physico-chemical characteristics inside a heated tank. The research subject of this work is a numerical investigation of the thermo-hydrodynamic behavior of viscoplastic fluid (Casson–Papanastasiou model) in a stirred tank, with introducing a new anchor impeller design by conducting some modifications to the standard anchor impeller shape. Four geometry cases have been presented for achieving the mixing process inside the stirred vessel, CAI; classical anchor impeller, AI1; anchor impeller with added horizontal arm blade, AI2 and AI3 anchor impeller with two and three added arm blades, respectively. The investigation is focused on the effect of inertia and plasticity on the thermo-hydrodynamic behavior (flow pattern, power consumption, and heat transfer) by varying the Reynolds number (Re = 1, 10, 100, 200), Bingham number (Bn = 1, 10, 50), in addition to the effect of geometry design in the overall stirred system parameters. The findings revealed an excellent enhancement of flow pattern and heat transfer in the stirred system relatively to the increase of inertia values. Also, an energy reduction has been remarked and the effect of anchor impeller shape. AI3 geometry design significantly improves the flow pattern and enhances heat transfer by an increased rate of 10.46% over the other cases.

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Nusselt number correlation for a jacketed stirred tank using computational fluid dynamics

Cited by 14 publications

References 24 publications

Karıştırıcılı Ceket Tip Isı Değiştiricilerin Isıl Davranışlarının Deneysel ve Sayısal Olarak İncelenmesi

Karıştırıcılı Ceket Tip Isı Değiştiricilerin Isıl Davranışlarının Deneysel ve Sayısal Olarak İncelenmesi

Advancing Nitrobenzene Hydrogenation Process Understanding: A Multiscale Modeling Approach using Industrial Pharmaceutical Production Data

Investigation of mixing viscoplastic fluid with a modified anchor impeller inside a cylindrical stirred vessel using Casson–Papanastasiou model

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