| Title |
Analysis of Mixed Convection Heat Transfer in Arbitrarily Shaped Flat Tubes |
| Keywords |
Radiator ; 라디에이터 ; Flat tubes ; 납작관 ; U-shaped groove ; U-형 그루부 ; Three- dimensional analysis ; 3차원 해석 ; Complex geometry ; 복잡형상 ; Mixed convection ; 혼합대류 |
| Abstract |
The flow and heat transfer characteristics for three-dimensional mixed convection flows in a radiator flat tube with U-shaped grooves are analyzed numerically. The flow and temperature fields are calculated by using the modified SIMPLE algorithm for irregular geometry. One tube specification among the various flat tube exchangers is recommended by considering the heat transfer and pressure drop. The effects of variation of coolant flow conditions and external air conditions on the flow and the thermal characteristics for the selected tube are investigated. The results show that inlet velocity of coolant flow is the very important factor in heat transfer and pressure drop, and top side is better position than the others as fin cleave to the tube. |