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dc.contributor Kumagai, Akihiko en_US
dc.contributor.advisor Kazemifar, Farzan en_US
dc.contributor.author Yan, Hongzhu
dc.date.accessioned 2019-08-30T22:10:59Z
dc.date.available 2019-08-30T22:10:59Z
dc.date.issued 2019-08-30
dc.date.submitted 2019-07-31
dc.identifier.uri http://hdl.handle.net/10211.3/213035
dc.description Thesis (M.S., Mechanical Engineering)--California State University, Sacramento, 2019. en_US
dc.description.abstract This research studies the single-phase fluid flow in a two-dimensional microfluidic cell focusing on particle trajectories to gain insight into the transport phenomenon in porous media. It evaluates the passing performance by calculating the trajectory of released particles through the cell. The study was performed on a microfluidic cell with a size of approximately 5 mm x 1.5 mm. COMSOL Multiphysics software was used to perform simulations. Fluid flow is governed by the Navier-Stokes equations, the laminar flow interface and the finite element method (FEM) were used to compute the fluid velocity and pressure fields within the cell domain. Six separate cases were considered: 1. constant injection velocity, 2. randomly varying velocity with the coefficient of variance (CV) of 1% and 0.5%, 3. Sine function with three different values of amplitude. The wall conditions were no-slip and bounce in the CFD Module and the Particle Tracing Module, respectively. Results were compared for the particle transmission probabilities, the velocity fields, pressure, longitudinal Lagrangian velocities/accelerations, and mean square displacement (MSD). The simulation with 0.5% randomly varying velocity and sine function with an amplitude of 5% had the highest value of transmission probability 0.785, and constant velocity had the lowest value of transmission probability 0.781. All six simulations had similar surface velocity field and pressure contour plots. Additionally, the MSD plots had similar trends as well, and the Fickian scaling was not reached during the simulation time. The dispersion was sub-diffusive and non-Fickian in all cases. en_US
dc.description.sponsorship Mechanical Engineering en_US
dc.language.iso en_US en_US
dc.subject Navier-Stokes equations en_US
dc.subject Laminar flow en_US
dc.subject Particle tracing module en_US
dc.title Lagrangian statistics of single-phase flow in porous media using COMSOL en_US
dc.type Thesis en_US

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