Journal
MICROGRAVITY SCIENCE AND TECHNOLOGY
Volume 30, Issue 4, Pages 435-443Publisher
SPRINGER
DOI: 10.1007/s12217-018-9605-x
Keywords
Microgravity; Two-phase flows; Bubble generation; T-junction; Computational Fluid Dynamics (CFD); Contact angle
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Funding
- Spanish Ministerio de Economia y Competitividad, Secretaria de Estado de Investigacion, Desarrollo e Innovacion [ESP2016-79196-P, MTM2013-46313-R]
- Generalitat de Catalunya [2017-SGR-1278]
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In this work, we study the influence of the contact angle boundary condition on 3D CFD simulations of the bubble generation process occurring in a capillary T-junction. Numerical simulations have been performed with the commercial Computational Fluid Dynamics solver ANSYS Fluent v15.0.7. Experimental results serve as a reference to validate numerical results for four independent parameters: the bubble generation frequency, volume, velocity and length. CFD simulations accurately reproduce experimental results both from qualitative and quantitative points of view. Numerical results are very sensitive to the gas-liquid-wall contact angle boundary conditions, confirming that this is a fundamental parameter to obtain accurate CFD results for simulations of this kind of problems.
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