Hydrodynamic characteristics of the microbubble dissolution in liquid using the swirl flow type of microbubble generator

Penelitian ini dilakukan untuk mengetahui distribusi ukuran diameter gelembung yang dihasilkan oleh alat pembangkit gelembung udara mikro (microgelembung generator/MBG). Gelembung yang dihasilkan direkam dengan menggunakan kamera berkecepatan tinggi (high speed camera). Metode yang digunakan untuk mengetahui ukuran gelembung yang dihasilkan adalah dengan menggunakan metode digital image processing (MDIP). MDIP ini memiliki keunggulan yaitu dapat mengukur dimensi distribusi gelembung pada aliran yang tidak teratur secara akurat serta pada operasinya tidak mempengaruhi aliran yang terbentuk. Hasil akhir dari ekstraksi data image processing ini adalah distribusi diameter microgelembung yang dinyatakan dalam Probability Distribution Function (PDF) dan digunakan untuk mempresentasikan perbandingan disribusi dimensi gelembung udara yang dihasilkan oleh MBG Kata Kunci: Gelembung Udara Mikro, Digital Image Processing, Highspeed Camera, Probability Distribution Function

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“…(2019) [2], Majid, dkk.. (2018) [3], Mawarni, dkk. (2020) [4], Mawarn, dkk.. (2021) [5], Mawarni dkk. (2022) [6]…”

Section: Tinjauan Pustakamentioning

confidence: 99%

Metode Digital Image Processing Untuk Menentukan Distribusi Ukuran Diameter Gelembung Udara Pada Microgelembung Generator

Mawarni¹,

Indarto

Deendarlianto

et al. 2023

JOISM

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“…In the subsequent study, tangential inlet water was employed to enter the swirling chamber, varying water and air flow rates [24]. Bubbles with a size of 150 microns were obtained by adjusting the water flow rate to 70 lpm and the air flow rate to 0.1 lpm.…”

Section: Schematic Of Mbgmentioning

confidence: 99%

“…To meet diverse application requirements, various methods for producing fine bubbles have been developed. The swirl-type microbubble generator is particularly effective in generating small-sized bubbles compared to other types [2], [13], [24]. The swirl-type Microbubble Generator (MBG) consists of three main components: tangential water inlet, swirling chamber, and mixing channel.…”

Section: Introductionmentioning

confidence: 99%

Review on swirl-type microbubble generator: Concept, technology, and applications

Mawarni,

Ristiyanto,

Deendarlianto

et al. 2023

Mech. Eng. for Soc. and Ind.

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The Microbubble Generator (MBG) is an aeration technology capable of producing micron-sized bubbles. Several researchers have conducted previous studies and developed various types related to the microbubble generator. The swirl-type microbubble generator has demonstrated advantages over other types. It has been widely explored recently due to its simple structure, efficiency in producing micron-sized bubbles, and potential applications across various fields. Therefore, this article reviews recent developments in swirl-type bubble generator research, encompassing the definition of microbubbles, methods for generating microbubbles through experimental and numerical approaches, the performance of microbubble generators, and their applications. Based on optimized geometric parameters combined with appropriate flow conditions, the swirl-type bubble generator is predicted to produce bubbles with controlled sizes and concentrations that meet specific requirements. However, further studies are needed to delineate the fluid-gas interactions comprehensively.

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“…The swirling-flow bubble generator has been widely studied. Mawarni et al 7 compared the bubble size and distribution in a swirling-flow microbubble generator and an orifice microbubble generator. The results indicated that the former generator creates smaller and more uniformly sized bubbles.…”

Section: ■ Introductionmentioning

confidence: 99%

Computer-Aided Bubble Size Control for a Swirling-Flow Bubble Generator

Chen

Song

2023

ACS Sustainable Chem. Eng.

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Flotation has garnered increasing attention as an indispensable technology for oily wastewater treatment for sustainable and green development. Bubbles are an essential element during the flotation process. Hence, it is important to examine bubble size control in a bubble generator employed in a flotation deoiling system. Herein, a swirling-flow bubble generator was studied via experiments, simulation, and machine learning methods. As the liquid Reynolds number increased from 16,047 to 32,095, the Sauter mean diameter decreased by 27.3%. Compared to the other open-hole schemes, the spiral-bottom open scheme was advantageous in reducing the bubble size, while decreasing the number of open holes reduced the bubble size further. When the surface tension changed from 0.06 to 0.03 N/m, D 32 decreased by 27.1%. Decreasing the height diameter ratio and increasing the angle between adjacent holes helped generate more smaller bubbles. However, for a given perforation velocity, the bubble size was insensitive to the size of the open holes. The relationship between D 32 and the involved variables was determined accurately by a support vector machine. Finally, a swirling-flow bubble generator with suitable specifications was installed in the flotation deoiling system to achieve an acceptable deoiling performance.

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Hydrodynamic characteristics of the microbubble dissolution in liquid using the swirl flow type of microbubble generator

Cited by 16 publications

References 32 publications

Metode Digital Image Processing Untuk Menentukan Distribusi Ukuran Diameter Gelembung Udara Pada Microgelembung Generator

Metode Digital Image Processing Untuk Menentukan Distribusi Ukuran Diameter Gelembung Udara Pada Microgelembung Generator

Review on swirl-type microbubble generator: Concept, technology, and applications

Computer-Aided Bubble Size Control for a Swirling-Flow Bubble Generator

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