Flow Characteristics in a Honeycomb Structure to Design Nanobubble Generating Apparatus
Corresponding Author
Nao-Aki Noda
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Correspondence: Nao-Aki Noda ([email protected]), Mechanical Engineering Department, Kyushu Institute of Technology, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, Fukuoka, 804-8550, Japan.Search for more papers by this authorHongfang Zhai
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorKakeru Takata
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorYoshikazu Sano
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorYasushi Takase
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorFei Ren
Qilu University of Technology, School of Mechanical and Automotive Engineering, No. 3501, Daxue Road, Changqing, Jinan, Shandong, China
Search for more papers by this authorRyo Kawano
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorToshihiko Umekaga
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorYuji Yonezawa
Marufukusuisan Corp., Ltd., Kokurakita-ku Nisimoinato-cho Kitakyushu-shi, Fukuoka, Japan
Search for more papers by this authorHiroyuki Tanaka
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorCorresponding Author
Nao-Aki Noda
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Correspondence: Nao-Aki Noda ([email protected]), Mechanical Engineering Department, Kyushu Institute of Technology, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, Fukuoka, 804-8550, Japan.Search for more papers by this authorHongfang Zhai
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorKakeru Takata
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorYoshikazu Sano
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorYasushi Takase
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorFei Ren
Qilu University of Technology, School of Mechanical and Automotive Engineering, No. 3501, Daxue Road, Changqing, Jinan, Shandong, China
Search for more papers by this authorRyo Kawano
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorToshihiko Umekaga
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorYuji Yonezawa
Marufukusuisan Corp., Ltd., Kokurakita-ku Nisimoinato-cho Kitakyushu-shi, Fukuoka, Japan
Search for more papers by this authorHiroyuki Tanaka
Kyushu Institute of Technology, Mechanical Engineering Department, Sensui-cho 1-1 Tobata-ku Kitakyushu-shi, 804-8550 Fukuoka, Japan
Search for more papers by this authorAbstract
A nanobubble generator with honeycomb structures producing a large amount of water including large nanobubble density in a short time is described. The nanobubble-generating performance is investigated for large and small apparatus having different honeycomb cell dimensions by applying computational fluid dynamics (CFD) coupled with a population balance model (PBM). The CFD simulation shows that a significant pressure drop and shear stress occur in the bubbly flow in the honeycomb cell. The numerical model is based on the Eulerian multiphase model and the PBM is used to calculate the bubble size distribution. The obtained CFD-PBM results are compared with the experimental results for large and small apparatus. Bubble size distributions in the honeycomb structure under different inlet absolute pressure can be predicted by the PBM. The maximum shear stress is determined as the main controlling factor for nanobubble generation.
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