On the 2D-1D coupling in numerical simulations of simplified air flow model in human airways

X International Conference on Computational Methods for Coupled Problems in Science and Engineering COUPLED PROBLEMS 2023, M. Papadrakakis, B. Schrefler and E. Oñate (Eds), (2023),


This paper presents selected results regarding the implementation, validation and testing of a simple 2D-1D coupled model designed to capture some essential features of the oscillatory air flow in human respiratory system. The model relies on a 2D flow model solved by a simple finite-difference scheme in the immersed boundary setting. The incompressible fluid flow from this model is coupled to a simplified 1D fluid-structure-interaction model simulating
the flow in a tube with elastic walls. Some first results obtained using the coupled 2D-1D model in an oscillating (Womersley-like) type of flow are presented and discussed in detail. The influence of model parameters is explored for a range of physically relevant settings.