added porosity note in nk-file

mlietzow · mlietzow · commit b2b1ba64eece · 2024-09-03T11:11:52.000+02:00
diff --git a/input/dust_nk/dsharp_b18.nk b/input/dust_nk/dsharp_b18.nk
@@ -2,7 +2,7 @@
 DSHARP composition (Birnstiel et al. 2018, ApJL, 869, L45)
 # see https://github.com/birnstiel/dsharp_opac
 
-# Bruggeman-Mix of 4 species
+# Bruggeman-Mix of 4 species (porosity = 0.0)
 # | material                             | volume fractions | mass fractions |
 # |--------------------------------------|------------------|----------------|
 # | Water Ice (Warren & Brandt 2008)     | 0.36419          | 0.20000        |
