ARUP; ISBN: 978-0-9562121-5-3 - CMBBE 2012 - Cardiff University

In the vestibule, the flow velocity was also high, because the cross section area of
vestibule is one of the smallest in the nasal cavity. Figure 5(b) showed the flow in the
maxillary sinus. In the maxillary sinus, the flow velocity was quite slow and circulating
flow was observed.
Fig.6 Temperature Distribution in the Nasal Cavity
Figure 6 illustrates temperature distribution of nasal cavity using counter. Figure 6(a)
shows temperature distribution calculated by latent heat model. Figure 6(b) shows
temperature distribution calculated by our previous model. Temperature distribution
calculated by latent head model was lower than previous the result of our previous
model at the nasal valve area and the kiesselbach area. It is thought that effects of
evaporation latent heat. In the both case, temperature was heated to body temperature
until the pharynx.
Fig.7 Relative Humidity Distribution in the Nasal Cavity
Figure 7 illustrates relative humidity distribution in the nasal cavity. Figure 7(a) is
relative humidity distribution calculated by latent heat model. Figure 7(b) is relative
humidity distribution calculated by our previous model. Relative humidity distribution,
calculated by latent heat model, is higher than our previous model’s result, because
temperature was decreased by latent heat and both cases have same mass water fraction
in inhaled air of nasal cavity. Therefore, relative humidity was increased.
5. Comparing Simulation Result with Measurement Results
Keck measured temperature and relative humidity at 1.6[cm], 2.5[cm] and 6.0[cm] [6].
The temperature, relative humidity and standard definition of these was plotted in