Comput Math Methods Med - Hybrid mesh for nasal airflow studies.

Tópicos

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Resumo

The accuracy of the numerical result is closely related to mesh density as well as its distribution. Mesh plays a very significant role in the outcome of numerical simulation. Many nasal airflow studies have employed unstructured mesh and more recently hybrid mesh scheme has been utilized considering the complexity of anatomical architecture. The objective of this study is to compare the results of hybrid mesh with unstructured mesh and study its effect on the flow parameters inside the nasal cavity. A three-dimensional nasal cavity model is reconstructed based on computed tomographic images of a healthy Malaysian adult nose. Navier-Stokes equation for steady airflow is solved numerically to examine inspiratory nasal flow. The pressure drop obtained using the unstructured computational grid is about 22.6Pa for a flow rate of 20L/min, whereas the hybrid mesh resulted in 17.8Pa for the same flow rate. The maximum velocity obtained at the nasal valve using unstructured grid is 4.18m/s and that with hybrid mesh is around 4.76m/s. Hybrid mesh reported lower grid convergence index (GCI) than the unstructured mesh. Significant differences between unstructured mesh and hybrid mesh are determined highlighting the usefulness of hybrid mesh for nasal airflow studies.

Resumo Limpo

accuraci numer result close relat mesh densiti well distribut mesh play signific role outcom numer simul mani nasal airflow studi employ unstructur mesh recent hybrid mesh scheme util consid complex anatom architectur object studi compar result hybrid mesh unstructur mesh studi effect flow paramet insid nasal caviti threedimension nasal caviti model reconstruct base comput tomograph imag healthi malaysian adult nose navierstok equat steadi airflow solv numer examin inspiratori nasal flow pressur drop obtain use unstructur comput grid pa flow rate lmin wherea hybrid mesh result pa flow rate maximum veloc obtain nasal valv use unstructur grid ms hybrid mesh around ms hybrid mesh report lower grid converg index gci unstructur mesh signific differ unstructur mesh hybrid mesh determin highlight use hybrid mesh nasal airflow studi

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