Gas-liquid flow in small channels: Artificial neural network classifiers for flow regime prediction

Haase, Stefan; Marschner, Steve; Ayubi, Mick Miro; Lange, Matthias

doi:10.1016/j.cep.2021.108687

Cited by 10 publications

(18 citation statements)

References 121 publications

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“…Dabei werden vor allem die großen volumenspezifischen Oberflächen sowie vorteilhaften Wärme‐ und Stoffübertragungseigenschaften von segmentierten Strömungen ausgenutzt 42, 43. Mit Grundlagenuntersuchungen zu Strömungsphänomenen sowie zum Wärme‐ und Stofftransport als auch anwendungsorientierter Forschung zum Transfer von Produktionsprozessen der Fein‐ und Spezialchemie vom Batch‐Betrieb in den kontinuierlichen Betrieb wurde die Mikroreaktionstechnik als feste Säule im Forschungsportfolio etabliert 44–46.…”

Section: Professuren Und Arbeitsgruppenunclassified

70 Jahre Verfahrenstechnik an der TU Dresden

Beckmann,

Babick,

Eckert

et al. 2023

Chemie Ingenieur Technik

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An der Technischen Hochschule Dresden, der Vorgängereinrichtung der TU Dresden, wurde 1953 mit der Besetzung der Fachprofessur für Verfahrenstechnik eine Fachrichtung „Ingenieur für Verfahrenstechnik“ eingerichtet und das heutige Institut für Verfahrenstechnik und Umwelttechnik begründet. Seitdem wurde das Profil in Ausbildung und Forschung des Instituts innerhalb der Fakultät Maschinenwesen der Technische Universität Dresden (TUD) erheblich weiterentwickelt. Ausgehend von dieser Entwicklung werden die heutigen Forschungsschwerpunkte der fünf Professuren und Arbeitsgruppen vorgestellt.

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Section: Professuren Und Arbeitsgruppenunclassified

70 Jahre Verfahrenstechnik an der TU Dresden

Beckmann,

Babick,

Eckert

et al. 2023

Chemie Ingenieur Technik

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“… [38–40] In microchannels, the bubbles need to be extremely small to be much smaller than the inner diameter of the channel, making it very unlikely that bubbly flow is observed (Figure 4A and Figure 4E). This is different from Taylor flow, in which the elongated gas bubbles are longer than the inner diameter of the channel [4,39] . Taylor–annular flow is observed when the velocity of the gas is increased compared to Taylor flow, and gas bubbles start to merge (Figure 4C).…”

Section: Continuous‐flow Setups For Handling Gas–liquid Reactionsmentioning

confidence: 99%

“…[4] Increasing the flow rate of the liquid results in bubbly flow, which is characterized by spherical or distorted gas bubbles which are smaller than or equal to the channel diameter (Figure 4A). [38][39][40] In microchannels, the bubbles need to be extremely small to be much smaller than the inner diameter of the channel, making it very unlikely that bubbly flow is observed (Figure 4A and Figure 4E). This is different from Taylor flow, in which the elongated gas bubbles are longer than the inner diameter of the channel.…”

Section: Introduction To Flow Regimesmentioning

confidence: 99%

Multiphasic Continuous‐Flow Reactors for Handling Gaseous Reagents in Organic Synthesis: Enhancing Efficiency and Safety in Chemical Processes

Laporte,

Masson,

Zondag

et al. 2023

Angewandte Chemie

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The use of reactive gaseous reagents for the production of active pharmaceutical ingredients (APIs) remains a scientific challenge due to safety and efficiency limitations. The implementation of continuous‐flow reactors has resulted in rapid development of gas‐handling technology because of several advantages such as increased interfacial area, improved mass‐ and heat transfer, and seamless scale‐up. This technology enables shorter and more atom‐economic synthesis routes for the production of pharmaceutical compounds. Herein, we provide an overview of literature from 2016 onwards in the development of gas‐handling continuous‐flow technology as well as the use of gases in functionalization of APIs.

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“…In two-phase flow experiments, the continuous phase and the dispersed phase enter the same channel from different channels, presenting different flow patterns. At present, flow patterns play an important role in the fields of biomedicine, material synthesis, and aerospace [ 1 , 2 , 3 ]. In the study of two-phase flow images, there are many types of flow pattern; for instance, slug, dripping, and jetting are the flow patterns used to generate monodispersed droplets.…”

Section: Introductionmentioning

confidence: 99%

The Recognition Algorithm of Two-Phase Flow Patterns Based on GoogLeNet+5 Coord Attention

2023

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The two-phase flow in a microchannel consists of liquid–liquid and gas–liquid material components. The automatic recognition of flow patterns using deep learning approaches has been emerging. This study aimed to improve the recognition accuracy of flow patterns in the two-phase flow images. The different convolutional kernels in the GoogLeNet algorithm extracted the image features with different scales. In order to strengthen the important channel and spatial features, this paper proposes the combined five-layer Coord attention and GoogLeNet algorithm to enhance the accuracy of the new algorithm. The optimized algorithm model was derived from image datasets with different liquid–liquid two-phase flows (NaAlg–Oil, GaInSn–Water), and its accuracy was 95.09% in training and 98.12% in testing. This new model was also applied to predict the flow patterns, with a recognition accuracy of more than 97% in both the liquid–liquid and gas–liquid two-phase flows (water–soybean oil, water–lubricating oil, and argon–water).

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Gas-liquid flow in small channels: Artificial neural network classifiers for flow regime prediction

Cited by 10 publications

References 121 publications

70 Jahre Verfahrenstechnik an der TU Dresden

70 Jahre Verfahrenstechnik an der TU Dresden

Multiphasic Continuous‐Flow Reactors for Handling Gaseous Reagents in Organic Synthesis: Enhancing Efficiency and Safety in Chemical Processes

The Recognition Algorithm of Two-Phase Flow Patterns Based on GoogLeNet+5 Coord Attention

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