Ruan, Y.D., Nadim, A., Duvvoori, L. and Chugunova, M. (2021) Liquid Films Falling down a Vertical Fiber: Modeling, Simulations and Experiments. Fluids, 6, Article No. 281.
https://doi.org/10.3390/fluids6080281

has been cited by the following article:

• TITLE: Parameter Identification in Traveling Wave Solutions of a Modified Fisher’s Equation

  AUTHORS: Zhixuan Jia, Ali Nadim

  KEYWORDS: PDE, Traveling Wave Solution, Stability Analysis, Machine Learning, Optimization, Embedding

  JOURNAL NAME: Applied Mathematics, Vol.14 No.5, May 29, 2023

  ABSTRACT: In this work, we focus on the inverse problem of determining the parameters in a partial differential equation from given numerical solutions. For this purpose, we consider a modified Fisher’s equation that includes a relaxation time in relating the flux to the gradient of the density and an added cubic non-linearity. We show that such equations still possess traveling wave solutions by using standard methods for nonlinear dynamical systems in which fixed points in the phase plane are found and their stability characteristics are classified. A heteroclinic orbit in the phase plane connecting a saddle point to a node represents the traveling wave solution. We then design parameter estimation/discovery algorithms for this system including a few based on machine learning methods and compare their performance.