Contact Finite Element with Surface Tension Adhesion

  • Rudolf A. P. Hellmuth
  • Raul G. Lima
Part of the Lecture Notes in Computational Vision and Biomechanics book series (LNCVB, volume 1)


This work is a contribution on the development of a computational model of lung parenchyma capable to simulate mechanical ventilation manoeuvres. This computational model should be able to represent adhesion caused by surface tension and be able suffer collapse and alveolar recruitment. Therefore, a contact finite element was developed and then simulated in a structure with structural properties of the same order of magnitude of a real alveolus. The simulation was performed with the non-linear finite element method. The implementation of the arc-length method was also necessary in order to prevent divergence at limit points. The numerical results of the simulation of a single alveolus, including the surface tension and adhesion, are qualitatively similar to experimental data obtained from whole excised lungs. Both present hysteresis and transmural pressures of the same order of magnitude.


Surface Tension Lung Parenchyma Transmural Pressure Adhesive Contact Contact Reaction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was supported by the National Counsel of Technological and Scientific Development (“Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico” – CNPq) 135262/2007-0.


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© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.Escola Politécnica da Universidade de São PauloSão PauloBrazil

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