Examining mesh independence for flow dynamics in the human nasal cavity

Computers in Biology and Medicine
Kiao InthavongJiyuan Tu

Abstract

Increased computational resources provide new opportunities to explore sophisticated respiratory modelling. A survey of recent publications showed a steady increase in the number of mesh elements used in computational models over time. Complex geometries such as the nasal cavity exhibit sharp gradients and irregular curvatures, leading to abnormal flow development across their surfaces. As such, a robust method for examining the near-wall mesh resolution is required. The non-dimensional wall unit y+ (often used in turbulent flows) was used as a parameter to evaluate the near-wall mesh in laminar flows. Mesh independence analysis from line profiles showed that the line location had a significant influence on the result. Furthermore, using a single line profile as a measure for mesh convergence was unsuitable for representing the entire flow field. To improve this, a two-dimensional (2D) cross-sectional plane subtraction method where scalar values (such as the velocity magnitude) on a cross-sectional plane were interpolated onto a regularly spaced grid was proposed. The new interpolated grid values from any two meshed models could then be compared for changes caused by the different meshed models. The application of this method t...Continue Reading

Citations

Aug 19, 2020·American Journal of Rhinology & Allergy·Giancarlo B CherobinGuilherme J M Garcia
Mar 1, 2020·Scientific Reports·Jan BrüningLeonid Goubergrits
Apr 18, 2019·American Journal of Physical Anthropology·Tarah N MarksRobert G Franciscus
May 23, 2021·Journal of Biomechanics·Kendra ShresthaKiao Inthavong
Jun 21, 2021·Respiratory Physiology & Neurobiology·Praween SenanayakeKiao Inthavong
Aug 6, 2021·Respiratory Physiology & Neurobiology·Kiao InthavongNarinder Singh
Jan 31, 2020·Computers in Biology and Medicine·Joey SiuRichard Douglas

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