Title page for ETD etd-1114101-090416

Type of Document Dissertation
Author Motl, Patrick Michael
Author's Email Address motl@rouge.phys.lsu.edu
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
  • computational fluid dynamics
  • relativistic binaries
  • interacting binaries
  • parallel computing
Date of Defense 2000-10-19
Availability unrestricted
We 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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