抄録
The characteristics of both flow and heat transfer were investigated experimentally and analytically for ice slurry flow in a return bend with rectangular cross section. The ice slurry, which is a mixture of fine ice particles and ethylene glycol aqueous binary solution, was utilized as a testing material. In this study, heat transfer coefficient at the heated wall was experimentally determined and ice packing factor distribution in the flow channel was observed in detail. Furthermore, a numerical simulation has been carried out to investigate both velocity distribution and solid fraction distribution in the flow channel. The solutions were obtained numerically by adopting the Algebraic Slip Mixture (ASM) model of a CFD code for number of flow path dimensions and flow parameters. The simulation results indicated that the flow behavior in the curved duct was strongly affected by both buoyancy and centrifugal force, therefore, secondary flow appeared within the parameter range covered in the present study.
