Patient-specific　models　are　widely　used　in　hemodynamic　simulations.　The　flow　in　the　boundary　layer　changes　so　strongly　that　fine　meshes　in　the　boundary　layer　are　required　in　numerical　simulations,　especially　for　the　calculation　of　wall　shear　stress　and　its　gradient.　To　precisely　analyze　hemodynamics,　it　is　necessary　to　investigate　the　approaches　to　the　reconstruction　of　a　numerical　simulation-oriented　patient-specific　model　for　aortic　arch　aneurysm　that　can　perform　particular　meshing　in　the　boundary　layer.　Based　on　a　surface　model　of　aortic　arch　aneurysm　in　STL　format,　reverse　engineering　concept　was　applied　to　reconstruct　a　solid　model　using　CAD　software　Geomagic　and　Pro/E,　and　a　simplified　model　of　stent　for　the　intervention　of　aortic　arch　aneurysm　was　also　created.　After　these　models　were　imported　to　ANSYS,　a　block　modeling　approach　was　employed　to　divide　the　whole　model　into　several　domain　blocks　to　adopt　different　meshing　strategies.　Particular　meshing　was　performed　especially　in　the　boundary　layer　and　around　the　stents.　The　finite　element　model　particularly　suitable　for　numerical　simulation　of　hemodynamics　was　obtained.　Hemodynamic　simulation　was　performed,　using　the　constructed　finite　element　model　to　verify　its　applicability.　The　results　indicate　that　reverse　engineering　concept　and　the　proposed　block　modeling　approach　can　be　used　to　divide　the　solid　model　of　aortic　arch　aneurysm　into　multiple　volumes,　which　can　be　meshed　according　to　particular　requirements　in　each　volume;　the　finite　element　model　of　stented　aortic　arch　aneurysm　can　be　employed　to　simulate　hemodynamics.　The　approaches　of　modeling　were　applicable　not　only　for　aortic　arch　aneurysm,　but　also　for　similar　model　reconstruction　as　a　reference　in　hemodynamic　simulation　investigations.　©　2010　Higher　Education　Press　and　Springer-Verlag　Berlin　Heidelberg.