For　a　space　with　a　large　ratio　of　horizontal　length　to　height,　field　modeling　or　Computational　Fluid　Dynamics　(CFD)　should　be　applied　for　predicting　fire-induced　airflow　in　building.　A　terminal　hall　of　366　in　wide　with　a　curvilinear　ceiling　is　considered　in　this　paper.　The　CFD.model　based　on　Reynolds　Averaging　Navier-Stokes　(RANS)　equations　with　k-epsilon　equations　for　turbulence　is　adopted.　Fire　is　taken　as　a　volumetric　heat　source(VHS)　and　buoyancy　effects　are　included　in　equations　for　the　vertical　momentum　and　turbulent　parameters.　Body-Fitted　Co-ordinate　(BFC)　transformation　technique　is　also　employed　to　fit　the　irregular　enclosure　ceiling.　The　airflow　velocity,　pressure　and　temperature　are　predicted　under　different　fire　scenarios.　The　phenomena　of　ceiling　jet,　air　entrainment　and　temperature　distribution　in　this　large　space　are　discussed.　Results　show　that　smoke　filling　processes　can　be　described　by　using　these　numerical　results.