Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Laplace pressure"”.
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Scalable Synthetic Trees for Transpiration-Powered Hydraulic Systems
… with wetted nanopores, mimicking the negative Laplace pressure seen in natural trees. Chapter 2 presents a detailed theoretical framework for transpiration in synthetic trees. These trees feature a vertical array of tubes connected to a nanoporous synthetic leaf. Our model considers the impact …
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Collective dynamics in lattice models far from equilibrium
… The density of the dilute phase is shifted by a Laplace pressure effect that arises from the curvature of the droplet, but the dense phase has stronger fluctuations than predicted by equilibrium-like hydrodynamic theories. We observe a strong numerical correspondence between the surface tensions …
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Capillary Force in High Aspect-Ratio Micropillar Arrays
… liquid body, rather than due to often reported Laplace pressure difference because of isolated capillary bridges. We have studied both theoretically and experimentally, the capillary force induced clustering behavior of micropillar arrays as a function of their elastic modulus. To this end, we …
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A study of static and dynamic robustness of hydro/omniphobic surfaces
… that are not flat but distorted due to pressure differences across the interfaces between the asperities. These distorted interfaces play an essential role in the transition from the composite Cassie-Baxter state to the fully-wetted Wenzel state and in the determination of the robustness …
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Fog Harvesting: Inspired by Spider Silk
… – surface tension force, hysteresis force, and Laplace pressure force. This thesis presents detailed equation derivations for each driving force in the introduction section. Spindle-knot is the pivot point to direct water, forming the spindle-knot structure is another focus of this thesis. Fluid …
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Portable Microfluidic Platform Employing Young-Laplace Pumping For Multiplexed Lab-On-A-Chip Applications
… surface tension induced pumping based on Young-Laplace pressure, which allows modifiable transport of fluids without external modules, making it an attractive approach for microfluidic applications. Using 3D-printing, a platform was developed that enables the distribution of specific liquid …
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Droplet Impact on a Solid Surface: Analytical Modeling and Experimentation for Spreading Phase
… due to capillary forces. The dynamic pressure from this motion creates a difference in curvature, and hence the dynamic pressure must be balanced by the Laplace pressure within the rim region. The rim forms when the rim region becomes thicker than the lamella. An analytical model was …
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Evaluation of Novel Fine Coal Dewatering Aids
… to be dewatered, which should help decrease the Laplace pressure of the water trapped in filter cake and, hence, increase dewatering rate. They were tested on i) the fresh coal samples from Consolidation Coal Corporation's Buchanan Preparation Plant, ii) a composite drill core sample from the …
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A Higher-Order VOF Interface Reconstruction Scheme for Non-Orthogonal Structured Grids - with Application to Surface Tension Modelling
… to fourth-order accuracy is demonstrated for the Laplace pressure jump in the simulation of a 2D stationary bubble with a high liquid-gas density ratio. A significant reduction in parasitic currents is demonstrated. Lastly, second-order accuracy is achieved when computing the frequency of a 2D …
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The Effects of Surface Topography on Droplet Evaporation and Condensation
… towards an equilibrium location le, where the Laplace pressure induced force is balanced with normal adhesion force, to minimize its Gibbs surface energy. As le decreases during the evaporation, this equilibrium location would directionally shift towards the cusp, which could be regarded as the …
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On the Physics of Ice Nucleation and Growth in Nanoscale
Fundamental understanding of ice formation on a surface, i.e. heterogeneous formation, is critical to suppress ice accretion on the surfaces. Ice formation on a surface includes two steps of ice nucleation and further ice growth. As water droplet is placed on a sub-zero surface, with a time delay, …