Table 2.

Comparison between the previous studies about particle transport in the human lung using RANS models.

	Airway model	RANS model	Particle tracking	Ventilation B.C.	Ret	Ret,c
Ma and Lutchen23	Oral cavity -bronchioles	k-ε	MFT TFT (G)	Horsfield et al.17	1200–4800*2	< 1200
Kleinstreuer and Zhang19	Oral cavity -trachea	LRN k-ω	TFT	NA	1200–4800*2	1200–2400
Darquenne et al.7	Trachea-bronchioles	k-ε	MFT	Horsfield et al.17	500–2500*3	8000*3
Jayaraju et al.18	Oral cavity-trachea	LRN k-ω*4	MFT TFT (G)	NA	2100	NA
Sandeau et al.27	Oral cavity-trachea	LRN k-ω	TFT (G)	NA	280–3100*5	400

^*1(G) = oral deposition efficiency is compared with that by Grgic et al.¹⁴

^*2D_t = 18 mm is assumed³⁶.

^*3The values are obtained from their earlier paper³³.

^*4RANS is compared with DES and LES.

^*5The values are computed based on Re = 400 for airflow of 128 ml/s.