NDLI: Investigating Behavior of Hydrogen Bubbles in Electro-Chemical Machining

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Tsuboi, Ryo Yamamoto, Makoto
Copyright Year	2008
Abstract	Electro-Chemical Machining (ECM) is an advanced machining technology and has been applied to highly specialized fields, such as aerospace, aeronautics, and medical industries. However, some problems remain to be solved. The efficient tool-design, electrolyte processing, and disposal of metal hydroxide sludge are typical problems. To solve such problems, CFD is thought to have potential as a powerful tool. However, a numerical method that can satisfactorily predict the ECM process has not been established because of the complex flow natures. In a previous study, we presented a new model to simulate the flow fields in an ECM process. This model is based on a two-way coupling method, taking the interaction between gas and liquid phases into account. In this coupling method, we assumed that electrolyte and generated hydrogen bubbles over a cathode surface have the same velocity. Therefore, we could simplify the governing equations. Since the flow field had a non-uniform density distribution due to hydrogen bubbles, a low Mach number approximation was applied to solve the pressure Poisson equation. In the present study, we calculate hydrogen bubble trajectories and investigate the distribution and a behavior of hydrogen bubbles. Since hydrogen bubbles follow fluid well, they travel along the stream line. This is because hydrogen bubbles have small density. In the results, around the low velocity region, hydrogen bubbles remain there with making the spiral structure. Hydrogen particles remain more in the suction side than that in the pressure side of the blade.
Sponsorship	Fluids Engineering Division
Starting Page	275
Ending Page	283
Page Count	9
File Format	PDF
ISBN	9780791848401
DOI	10.1115/FEDSM2008-55296
e-ISBN	0791838323
Volume Number	Volume 1: Symposia, Parts A and B
Conference Proceedings	ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
Language	English
Publisher Date	2008-08-10
Publisher Place	Jacksonville, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Suction Approximation Blades Computational fluid dynamics Hydrogen Metals Machining Aeronautics Poisson equation Flow (dynamics) Density Pressure Aerospace industry Design Bubbles Fluids Biomedicine Numerical analysis Particulate matter Electrolytes Mach number
Content Type	Text
Resource Type	Article

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