Experimental studies on the instabilities of viscous fingering in a Hele-Shaw cell

Baig, Chung Gi; Chun, Yang Sook; Cho, Eun Su; Choi, Chi Kyu

doi:10.1007/bf02707138

Cited by 1 publication

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One type of Hele-Shaw flow with trapped air occurs when there is an opening through which the second fluid of lower viscosity (e.g., air) is applied. This fundamental scenario has been studied by different authors (Baig et al, 2000;Fast and Shelley, 2004). Due to its similarity to this work with regard to the model structure, this flow form will be considered in more detail below.…”

Section: Hele-shaw Flowmentioning

confidence: 97%

Towards the efficient modelling of trapped air pockets during squeeze flow

Müller

Willenbrock

Stahl

et al. 2022

Exp. Comput. Multiph. Flow

View full text Add to dashboard Cite

In most bonding processes, an adhesive is applied to a substrate in a specific pattern before the second substrate is subsequently pressed against it. During this, the adhesive flows in such a way that, ideally, it completely fills the joint. In practice, however, areas with entrapped air frequently remain in the bonded adhesive layer. Within the scope of a research project, these flows are systematically analyzed in order to identify optimal initial application patterns for the adhesive and substrate geometry to minimise such risks. For this purpose, the authors use an efficient flow model, the partially filled gaps model (PFGM), extended in this study to include the functionality of trapped air pockets. Depending on the volume fractions of air and adhesive, the flow of both phases is computed. Therefore, the model is introduced and fully described, benchmarked with respect to its plausibility and functionality, and results obtained are compared with a CFD calculation. Thereafter, the functionality of openings and closings of the pockets are analyzed. Lastly, the model is then applied to a real scenario created with a Hele-Shaw cell measurement. The benchmark as well as the comparison with the measurement results show the high potential of this technique.

show abstract

Section: Hele-shaw Flowmentioning

confidence: 97%