The influence of the shape of brash ice models on the prediction of ship resistance in the brash channel
The accuracy of ship resistance prediction in the brash ice channel is significantly influenced by the shape of brash ice models in numerical simulation.This study focuses on a polar environmentally friendly multipurpose transport ves-sel and investigates the impact of seven different shapes of brash ice models on the prediction of ship resistance in the brash ice channel.Seven different shapes of flaky brash ice models were established,including circle,oval,square,regular pentagon,regular hexagon,trapezoid,and irregular polygon.The CFD-DEM coupling numerical method was applied to pre-dict the ship resistance in the brash ice channel,and the results were compared with HSVA ice tank tests.The results show that seven different shapes of flaky brash ice models all can effectively simulate HSVA tests'phenomena.By comparison of the numerical calculation results in seven different ice shape condition with HSVA test results,it is shown that the numerical calculation results are all larger than test results and flaky circular brash ice model has the minimum error of 2.04％.There-fore,flaky circular shape is more recommended in CFD-DEM calculation from the perspective of resistance prediction.
ice vesselshape of brash ice modeldiscrete element methodship resistance
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