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Full-Text Articles in Physical Sciences and Mathematics
High Order Finite Elements For Lagrangian Computational Fluid Dynamics, Truman Everett Ellis
High Order Finite Elements For Lagrangian Computational Fluid Dynamics, Truman Everett Ellis
Master's Theses
A general finite element method is presented to solve the Euler equations in a Lagrangian reference frame. This FEM framework allows for separate arbitrarily high order representation of kinematic and thermodynamic variables. An accompanying hydrodynamics code written in Matlab is presented as a test-bed to experiment with various basis function choices. A wide range of basis function pairs are postulated and a few choices are developed further, including the bi-quadratic Q2-Q1d and Q2-Q2d elements. These are compared with a corresponding pair of low order bi-linear elements, traditional Q1-Q0 and sub-zonal pressure Q1-Q1d. Several test problems are considered including static convergence …
Autonomous Satellite Operations For Cubesat Satellites, Jason Lionel Anderson
Autonomous Satellite Operations For Cubesat Satellites, Jason Lionel Anderson
Master's Theses
In the world of educational satellites, student teams manually conduct operations daily, sending commands and collecting downlinked data. Educational satellites typically travel in a Low Earth Orbit allowing line of sight communication for approximately thirty minutes each day. This is manageable for student teams as the required manpower is minimal. The international Global Educational Network for Satellite Operations (GENSO), however, promises satellite contact upwards of sixteen hours per day by connecting earth stations all over the world through the Internet. This dramatic increase in satellite communication time is unreasonable for student teams to conduct manual operations and alternatives must be …