Hangjie Ji bio photo

Hangjie Ji

I'm from Hangzhou, China. Currently in Los Angeles, USA. Passionate about mathematics and technology.


Me in a Nutshell

I am an Assistant Adjunct Professor for the Program in Computing at University of California, Los Angeles.

I completed my Ph.D. in Mathematics at Duke University under the guidance of Professor Thomas P. Witelski. For the past five years, I have been working on problems in the field of fluid dynamics, more specifically, the nonlinear diffusion processes in thin films.


  • Ph.D. in Mathematics , Duke University, 2012 - 2017
  • M.S. in Computer Science, Duke University, 2015 - 2016
  • B.S. in Mathematics, Zhejiang University, 2008 - 2012

Research Interests

Partial differential equations, fluid dynamics, scientific computing

Publications and preprints

  1. H. Ji, T. P. Witelski, Finite-time thin film rupture driven by modified evaporative loss, Physica D: Nonlinear Phenomena, vol 342 (2017), pp. 1-15 [Link]

  2. Y. Gao, H. Ji, J. Liu, T. P. Witelski, Global existence of solutions to a tear film model with locally elevated evaporation rates, Physica D: Nonlinear Phenomena, vol 350 (2017), pp. 13-25 [Link]

  3. Y. Gao, H. Ji, J. Liu, T. P. Witelski, A vicinal surface model for epitaxial growth with logarithmic free energy, Discrete & Continuous Dynamical Systems - B (2018): 1771-1784. [Link]

  4. H. Ji, T. P. Witelski, Instability and dynamics of volatile thin films, Physical Review Fluids 3, no. 2 (2018): 024001. [Link]

  5. X. Hu, Y. Li, H. Ji, A nodal-based finite element approximation of a phase field model for shape and topology optimization, to appear in Applied Mathematics and Computation (2018), preprints available upon request.

  6. H. Ji, L. Li, Numerical methods for nonlinear shallow shell problems, submitted [Link].

  7. H. Ji, T. P. Witelski, Steady states and stability analysis of thin films with non-conservative effects, preprints available upon request.

Curriculum Vitae

You can download my full CV here.