2026-09-19T00:45:30Zhttps://ecommons.cornell.edu/server/oai/requestoai:ecommons.cornell.edu:1813/593482026-05-15T19:44:54Zcom_1813_35col_1813_47
Palmore, John
Desjardins, Olivier
Diamessis, Peter J.
Avedisian, C. Thomas
2018-10-23T13:21:59Z
2020-06-04T06:00:30Z
2018-05-30
ProQuest Submission ID: 10863
ProQuest Publication ID: 10817416
https://hdl.handle.net/1813/59348
https://doi.org/10.7298/X4CJ8BPB
10489433
The design of next generation internal combustion engines will require a more detailed understanding of the dynamics of fuel combustion. One way of studying this combustion process is through computational simulations of fuel injection, break-up and combustion processes. However, currently no computational fluid dynamic code is capable of simulating this entire process. The key missing aspect in simulating the fuel combustion process is resolving the vaporization process. As combustion occurs in the gas phase, a liquid fuel must vaporize before combustion can occur. The current dissertation demonstrates a computational framework for simulating such a vaporizing flow. The framework is built from the ground up starting from the laws of conservation of mass, momentum, and energy combined with the relevant thermodynamic relations. The framework discussed in this work will have a few properties that make it suitable towards the goal of simulating vaporizing multiphase flows. First, the solver is verified to produce convergent solutions, regardless of the thermodynamic regime of vaporization. Second, the actual implementation of vaporization sources is unconditionally stable, making simulation practical at all mesh resolutions. Both of these properties are important for performing simulations of real combustion configurations. This dissertation also includes a study on simulating droplet-laden turbulent flows, and explores the impact of flow turbulence on vaporization.
en_US
CFD
multiphase
phase change
turbulence
Aerospace engineering
Numerical Framework for Simulating Multiphase Flows with Phase Change
dissertation or thesis
application/pdf
Aerospace Engineering
Cornell University
Doctor of Philosophy
Ph. D., Aerospace Engineering
https://hdl.handle.net/1813/59810
Publication
Cornell Theses and Dissertations
Palmore, John
5893a6ea-7af3-41d7-abc6-04bcd26ab5df
open.access
open.access
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<Abstract>The design of next generation internal combustion engines will require a more detailed understanding of the dynamics of fuel combustion. One way of studying this combustion process is through computational simulations of fuel injection, break-up and combustion processes. However, currently no computational fluid dynamic code is capable of simulating this entire process. The key missing aspect in simulating the fuel combustion process is resolving the vaporization process. As combustion occurs in the gas phase, a liquid fuel must vaporize before combustion can occur. The current dissertation demonstrates a computational framework for simulating such a vaporizing flow. The framework is built from the ground up starting from the laws of conservation of mass, momentum, and energy combined with the relevant thermodynamic relations. The framework discussed in this work will have a few properties that make it suitable towards the goal of simulating vaporizing multiphase flows. First, the solver is verified to produce convergent solutions, regardless of the thermodynamic regime of vaporization. Second, the actual implementation of vaporization sources is unconditionally stable, making simulation practical at all mesh resolutions. Both of these properties are important for performing simulations of real combustion configurations. This dissertation also includes a study on simulating droplet-laden turbulent flows, and explores the impact of flow turbulence on vaporization.</Abstract>
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