Type of Document Dissertation Author Motl, Patrick Michael Author's Email Address email@example.com URN etd-1114101-090416 Title Numerical Simulations of Dynamical Mass Transfer in Binaries Degree Doctor of Philosophy (Ph.D.) Department Physics and Astronomy Advisory Committee
Advisor Name Title Juhan Frank Committee Chair Joel Tohline Committee Member Paul Kirk Committee Member Richard Haymaker Committee Member Bob Dorroh Dean's Representative Keywords
- computational fluid dynamics
- relativistic binaries
- interacting binaries
- parallel computing
Date of Defense 2000-10-19 Availability unrestricted AbstractWe present results from investigations of mass
transfer instability in close binary star systems.
By unstable mass transfer we mean the exchange of
material where the response of the binary to the initial Roche lobe overflow causes the donor to loose even more material. Our work is guided by approximate arguments that dictate the stability
boundaries for binary star systems. To proceed further one must explicitly treat extended mass and velocity distributions that are both nitially, and through their subsequent evolution in time, self-consistent. In this dissertation, we present the first three-dimensional, fully
self-consistent treatment of mass transfer in close binary systems. To perform these calculations we have developed and tested a set of tools including a Self-Consistent Field
code for generating polytropic binaries executing synchronous rotation upon circular orbits
and a parallel, gravitational hydrodynamics code for evolving the binaries in time. We describe, in detail, these tools and their application to the evolution of binary star systems.
We present extended simulations of two detached binaries that have been used to examine the accuracy of our computational techniques in addition to the simulations of interacting binaries.
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