Influence of Contact Angle Boundary Condition on CFD Simulation of T-Junction
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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.
KeywordsMicrogravity Two-phase flows Bubble generation T-junction Computational Fluid Dynamics (CFD) Contact angle
This work has been financially supported by the Spanish Ministerio de Economía y Competitividad, Secretaría de Estado de Investigación, Desarrollo e Innovación (Project numbers ESP2016-79196-P and MTM2013-46313-R) and the Generalitat de Catalunya (Grant number 2017-SGR-1278).
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