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dc.contributor.advisor Bayazitoglu, Yildiz
dc.creatorHos, Pascal
dc.date.accessioned 2009-06-04T06:48:06Z
dc.date.available 2009-06-04T06:48:06Z
dc.date.issued 2001
dc.identifier.urihttps://hdl.handle.net/1911/17976
dc.description.abstract The behavior of a nanoscale fluid system in the subcritical region is investigated using molecular simulation. The fluid used is argon and the intermolecular forces are represented by the Lennard-Jones potential. The simulations show that the phase change in a nanoscale system becomes continuous as opposed to the constant temperature and constant pressure phase change for a macroscale system. Then nonlinear curve fitting was performed using two cubic equations to obtain a representation of the simulation data. The continuous phase change behavior predicted by the molecular simulation is verified by using an approximate analytical analysis. A cubical system is defined for five different configurations based on the minimization of the interfacial surface area. These systems are then analyzed to define their thermodynamic behavior by using a technique to minimize the Helmholtz free energy. It is also shown how this continuous phase change alters the behavior of nanoscale thermal systems in subcritical thermodynamic cycles. A nanoscale vapor heat engine shows a lower efficiency than the macroscale vapor heat engine and the coefficient of performance for a nanoscale refrigeration cycle is higher than that for a macroscale refrigeration cycle.
dc.format.extent 127 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectMechanical engineering
dc.title Nanoscale thermal systems in subcritical region
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Mechanical Engineering
thesis.degree.discipline Engineering
thesis.degree.grantor Rice University
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy
dc.identifier.citation Hos, Pascal. "Nanoscale thermal systems in subcritical region." (2001) Diss., Rice University. https://hdl.handle.net/1911/17976.


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