Software Assistant

Wan-Chi Tsai

**** **** ****** [M] 530-***-****

Fremont, CA 94538 *****@*******.***

Education

• Ph.D. in Computational Science and Engineering, University of California, Davis. GPA: 3.78

• M.S. in Applied Mathematics, National Cheng Kung University, Taiwan. GPA: 4.00

• B.S. in Mathematics, National Taitung University, Taiwan. Major GPA: 3.87

Computer skills

• Object-oriented programming (OOP) and design pattern (OOD).

• Proficiency in C/C++, Parallel Programming with MPI, Fortran, Matlab, Python.

• Software skills in Valgrind, gdb, SVN, Chombo, LaTeX, VisIt, Lapack, GNU Make, and applications on Linux.

Experiences

Doctoral Researcher, 09/2008–03/2014

Department of Applied Science, University of California, Davis.

• Developed numerical software for incompressible viscoelastic fluids among large relaxation time spectrum

in complex geometries. This invented method reduces numerical noise at boundaries, resolved numerical

stability issues for high Weissenberg number problems, achieves second order convergence rates, and

demonstrates the comparability with real experimental results.

• Designed test problems for our software including CFD benchmark problems: simulations of flow passing

a sphere, flow in abrupt contraction channels, and well-rounded contraction channels. Verified stability

and numerical accuracy.

• Optimized runtime performance of our numerical software on a Linux platform including profiling of sub-

routine calls, eliminating disk I/O and reducing memory usage. Parallelized the code for high performance

computing (HPC) using MPI.

• Implemented exact and approximate second order projection methods for incompressible Navier-Stokes

equation with embedded boundary conditions based on Chombo EB AMR software framework (C++

and Fortran libraries with MPI solving partial differential equations using finite volume methods with

embedded boundary and adaptive mesh refinement methods).

• Implemented high performance iterative methods - multigrid method - for large sparse linear systems with

minimized memory usage.

• Analyzed and visualized numerical results with HDF5 scientific data format using visualization tool -

VisIt, and Python for post-processing.

• Accomplished high resolution finite volume method for Euler and Navier-Stokes equations; improved shock

capture ability in gas dynamics and hydrodynamics.

Research Assistant, 09/2005–07/2007

Department of Applied Mathematics, National Cheng Kung University, Taiwan.

• Implemented finite difference methods for steady state and time dependent partial differential equations

and analyzed their stability and accuracy.

• Developed boundary integral methods, with applications in 3D shock wave lithotripsy, for pressure inten-

sity propagation using triangle grid discretizations, and implemented in C and Matlab.

Publication

W.-C. Tsai, G. Miller, Numerical simulations of viscoelastic fluids in complex geometries using a multi-mode Giesekus

model, submitted to Journal of Non-Newtonian Fluid Mechanics.

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