Strong　secondary　flow　generated　by　ribbed　channel　and　U-shaped　bend　is　the　key　for　forced　convection　performance　and　energy　dissipation　in　U-shaped　cooling　passage.　This　investigation　studies　the　coupling　of　nine　different　rib　orientation　and　the　180-degree　bend　on　overall　friction　loss　and　forced　convection　in　the　U-shaped　passage　by　ANSYS　CFX　commercial　CFD　package　when　Re=30000.　The　comprehensive　evolution　of　secondary　flow　is　visualized　by　vortex　core　method　and　colored　by　turbulence　kinetic　energy.　The　qualitative　results　show　that　the　Nu　ratio　and　overall　pressure　loss　in　the　downstream　passage　(Passage　2)　is　highly　affected　by　the　upstream　geometry.　The　N-type　rib　orientation　in　Passage　1　delivers　more　disturbance　energy　into　Passage　2　where　P-type　rib　orientation　can　reduce　the　momentum　loss　of　the　upstream　secondary　flows　and　pressure　loss.　Based　on　the　understanding　of　interaction　of　secondary　flow　near　the　bend,　modified　bend　geometry　is　proposed　with　9%　thermal　performance　gain　over　the　existent　optimized　rib　orientation.　This　investigation　suggests　vortex　core　method　is　a　promising　visualization　tool　for　the　flow　control　and　optimization　in　U-shaped　cooling　channel　with　angled　ribs.