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, to appear in Discrete & Continuous Dynamical Systems - B. [Link]

  4. H. Ji, T. P. Witelski, Instability and dynamics of volatile thin films, to appear in Physical Review Fluids. [Link]

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

  6. X. Hu, Y. Li, H. Ji, A nodal-based finite element approximation of a phase field model for shape and topology optimization, submitted, preprints available upon request.

  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.