Physical conditions in a representative model (Table 1) with δ_gas = 10^-2 and δ_dust = 10^-5 (dusty inner disk present). Only regions with a gas density larger than 10⁵ cm^-3 are shown. The contour lines on the panels match to the lines on the color bars. The panels provide a) gas density structure; b) gas/dust mass ratio; c) calculation grid; d) FUV radiation field; e) visual extinction; f) abundance of PAHs; g) dust temperature; h) gas temperature; i) ratio of gas to dust temperature; j) H₂ abundance; k) CO abundance; and l) O abundance.