Change search
ReferencesLink to record
Permanent link

Direct link
Numerical Investigation of Free Surface Flows
Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, Department of Marine Technology.
2014 (English)MasteroppgaveStudent thesis
Abstract [en]

The Star-CCM+ simulation software has been used to model a number of benchmark free surface flow cases, including the two dimensional submerged NACA 0012 foil, the surface piercing NACA 0024 foil, and the well investigated KCS vessel. The findings from the foil benchmark cases have permitted substantial improvement in the accuracy and convergence of the results for the KCS vessel when compared to preliminary studies undertaken as part of the master's project. It has been observed that a minimum set of temporal and spatial resolutions are required to yield an acceptable numerical solution, and guidelines to ensure that these requirements are met have been formulated, including modification of the default Star-CCM+ solver parameters for supposedly steady state free surface flows. Time step independent solutions for all of the cases investigated have been found, however the mesh resolution requirements to obtain this independence vary significantly, and some practical limitations regarding mesh size in the ship case precludes taking the most demanding requirements found and using them as a general recommendation. Some additional work, focusing on investigation of additional ship cases, has been proposed with the objective of clarifying guidelines for creating a time step independent mesh for ship flow problems. In general, a modelling approach has been identified using the Star-CCM+ software which yields a satisfactory result for a ship resistance prediction and a good starting point for further investigation of the nominal wake scaling problem.

Place, publisher, year, edition, pages
Institutt for marin teknikk , 2014. , 87 p.
URN: urn:nbn:no:ntnu:diva-26846Local ID: ntnudaim:11480OAI: diva2:752198
Available from: 2014-10-02 Created: 2014-10-02 Last updated: 2014-10-02Bibliographically approved

Open Access in DiVA

fulltext(2250 kB)1377 downloads
File information
File name FULLTEXT01.pdfFile size 2250 kBChecksum SHA-512
Type fulltextMimetype application/pdf
cover(184 kB)5 downloads
File information
File name COVER01.pdfFile size 184 kBChecksum SHA-512
Type coverMimetype application/pdf

By organisation
Department of Marine Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 1377 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 520 hits
ReferencesLink to record
Permanent link

Direct link