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Modeling of fluid flow in capillary channels

Author
Zhang, Zhifeng
Published
[University Park, Pennsylvania] : Pennsylvania State University, 2018.
Physical Description
1 electronic document
Additional Creators
Drapaca, Corina Stefania
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Open Access.
Summary
Flow in capillary channels (capillary flow) occurs throughout nature, biology, and engineering. Recently, two types of capillary channels have been widely investigated: a narrow constricted capillary and a leaky capillary. Theoretical studies on these two types of capillary flow have become necessary due to their increasing significance in device miniaturization, drug delivery, microfluidics, pathology, and chemical engineering. This dissertation proposes three theoretical models in order to understand the physics of these two capillary flows and inspire future research. Part I discusses fluid mechanics in a narrow constricted capillary. This part is divided into two models. Model I proposes a new concept: minimum impulse critical velocity. This concept can be used in the optimization of a droplet transported through a narrow constricted capillary channel. Model 2 proposes an analytical model to predict the transient pressure of squeezing a viscous droplet through a narrow constricted channel. This model was developed using the combination of the Young- Laplace law and the HagenPoiseuille law. Part II discusses thermodynamics in a leaky capillary. Model 3 proposes a new evaluation parameter for a leaky capillary channel based on the virtual entropy generation (VEG) method. We believe the above theoretical studies will inspire future industry, engineering operation, and biological understandings.
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Dissertation Note
Ph.D. Pennsylvania State University 2018.
Reproduction Note
Microfilm (positive). 1 reel ; 35 mm. (University Microfilms 28281146)
Technical Details
The full text of the dissertation is available as an Adobe Acrobat .pdf file ; Adobe Acrobat Reader required to view the file.
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