CFD RANS Simulations on a Generic Conventional Scale Model Submarine: Comparison between Fluent and OpenFOAM
DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION FISHERMANS BEND (AUSTRALIA) MARITIME DIV
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The ability to perform accurate Computational Fluid Dynamic CFD simulations of the flow around submarines is crucial for support to SEA1000. The Hydroacoustics Group in MD have been using the commercial software code Fluent for some years now to perform these simulations, but recently have been considering using the open source code OpenFOAM to replace some of the Fluent simulations. The fidelity of the Fluent code has been carefully validated, but the accuracy of parts of the OpenFOAM code have not been so extensively tested. To test the accuracy of the OpenFOAM software, CFD simulations have been performed on the DSTO generic conventional submarine model using both Fluent and OpenFOAM. A comparison of the value of the drag coefficient calculated by the two codes shows differences of up to 15. A partial resolution of these differences has been found and the discrepancy has been reduced in some cases, but unacceptable differences are still present. This report summarizes the work performed so far to highlight and resolve these differences, and suggests further work which needs to be done to provide confidence in the use of these codes.
- Submarine Engineering