Type of Document Master's Thesis Author Fried, Jeremy Author's Email Address email@example.com URN etd-08202007-195746 Title Numerical Simulation of Viscous Flow: A Study of Molecular Dynamics and Computational Fluid Dynamics Degree Master of Science Department Electrical and Computer Engineering Advisory Committee
Advisor Name Title Kachroo, Pushkin Committee Chair Abbott, A. Lynn Committee Member Lindner, Douglas K. Committee Member Keywords
- Poiseuille flow
- molecular dynamics
- computational fluid dynamics
Date of Defense 2007-08-07 Availability unrestricted AbstractMolecular dynamics (MD) and computational fluid dynamics (CFD) allowresearchers to study fluid dynamics from two very different standpoints. From a microscopic standpoint, molecular dynamics uses Newton's second law of motion to simulate the interatomic behavior of individual atoms, using statistical mechanics as a tool for analysis. In contrast, CFD describes the motion of a fluid from a macroscopic level using the transport of mass, momentum, and energy of a system as a model.
This thesis investigates both MD and CFD as a viable means of studying viscous flow on a nanometer scale. Specifically, we investigate a pressure-driven Poiseuille flow. The results of the MD simulations are processed using software we created to measure velocity, density, and pressure. The CFD simulations are run on numerical software that implements the MacCormack method for the Navier-Stokes equations. Additionally, the CFD simulations incorporate a local definition of viscosity, which is usually uncharacteristic of this simulation method. Based on the results of the simulations, we point out similarities and differences in the obtained steady-state solutions.
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