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, C. Falcon, A. Sadeghpour, Z. Zeng, Y. S. Ju, A. L. Bertozzi, Dynamics of thin liquid films on vertical cylindrical fibers. To appear in Journal of Fluid Mechanics (2019). [arXiv] [Video Link]

  2. H. Ji, L. Li, Numerical methods for thermally stressed shallow shell equations, to appear in Journal of Computational and Applied Mathematics (2018). [Link]

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

  4. 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]

  5. X. Hu, Y. Li, H. Ji, A nodal-based finite element approximation of a phase field model for shape and topology optimization, Applied Mathematics and Computation (2018). [Link]

  6. 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]

  7. 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]

  8. H. Ji, Thin Films with Non-conservative Effects, PhD Dissertation, Mathematics, Duke University, 2017. [Link]

  9. H. Ji, T. P. Witelski, Steady states and stability analysis of thin films with non-conservative effects. Preprint upon request, 2018.

  10. A. Sadeghpour, Z. Zeng, H. Ji, N. D. Ebrahimi, A. L. Bertozzi, Y. S. Ju, Dehumidification using an array of traveling liquid beads for desalination and water treatment. Submitted, 2018.

  11. Y. Dukler, H. Ji, A. L. Bertozzi, A. Munch, A theory for undercompressive shocks in tears of wine. In preparation, 2018.

Curriculum Vitae

You can download my full CV here.