I am simulating airflow through a human nose. The geometry is taken from an STL file and I want to identify and set the nostrils as the inlet plane. As the structure of the nostril opening is not a proper geometrical shape (not a circle or ellipse and both the nostrils are very closely placed), I am having difficulty in identifying the regions through an IndicatorFunction. Is there a smarter and better way to define the boundary regions? For ex, maybe a list of coordinates may be read from a file, which corresponds to the face centers of the STL triangles making up the plane? Any suggestions will be helpful!
Thanks and Regards,