Skip to main content
. 2021 Sep 29;11(10):2567. doi: 10.3390/nano11102567

Figure 4.

Figure 4

The velocity distribution of airflow in different fiber membranes. (a) cylindrical fiber with a diameter of 2.0 µm; (b–f) spiral fibers with a diameter of 2.0 µm and the pitch was 4.0 µm, 3.5 µm, 3.0 µm, 2.5 µm and 2.1 µm, respectively.