Abstract
Objectives : Myringotomy with tubes is the most common otologic surgery, and most surgeons prescribe water exposure precautions after surgery. The dynamics of air and water inside the external auditory canal and the transtympanic tube during submersion is analysed and preliminary results are presented. Study Design : Multiphase Computational Fluid Dynamics Model (CFD) Material and methods : A computerized tomography was the base of the outer and middle ear geometry. The multiphase air-water model of Computational Fluid dynamics (CFD) model was then used in the study the inflow of water, and the escape of air through the auditory tube. Results : The multiphase CFD model effectively describes the progression of the fluid front in the external auditory canal, the behaviour of the retained air and the air release through the auditory tube. The model also predicts under which conditions water crosses the tube to the middle ear. Conclusions : The model confirms previously published results and can be considered adequate to study the behaviour of air and water retained in the external and middle ear.
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