In order to evaluate the waterborne performance of amphi bious vehicle

the commercial computational fluid dynamics software FLUENT widel y adopted was applied to simulate the resistance of the actual size amphibious v ehicle.Based on related fluid dynamics knowledge

Navier-Stokes equations was solved with the k-ε turbulence model

and the free surface was processed b y using VOF(Volume of Fluid) method.The calculating model was a amphibious vehi cle which has been tested by a lot of detailed experiments.Through a lot of exp eriments

a appropriate turbulence model was selected and its turbulence paramet er was determined.The reliability of computing method was validated by comparin g the calculation results with the test data.