We　investigated　the　influence　of　crucible　rotation　on　oxygen　concentration　in　the　melt　using　numerical　analysis　in　the　unidirectional　solidification　process　for　solar　cells.　The　results　showed　that　oxygen　concentration　in　the　melt　using　crucible　rotation　is　higher　than　that　without　using　crucible　rotation.　The　reason　is　that　the　magnitude　of　decrease　in　the　flux　of　oxygen　evaporation　from　the　top　of　the　melt　is　larger　than　that　of　oxygen　dissolution　from　the　crucible　wall　to　the　melt　in　the　case　of　high　crucible　rotation　rate.　(C)　2008　Elsevier　B.V.　All　rights　reserved.