The mesh influence in fluid flow

  • Liviu Galateanu “Dunarea de Jos” University of Galati
  • Matei Cosmin Baciu “Dunarea de Jos” University of Galati
  • Alin Pohilca “Dunarea de Jos” University of Galati
  • Costel Iulian Mocanu “Dunarea de Jos” University of Galati
Keywords: mesh adapting, multihull, ship hydrodynamic resistance.

Abstract

The principal objective of this study is to adapt the mesh of the computational fluid dy-namics to obtain a good accuracy. In the past, the experimental results were a good bench-mark for predicting ship water resistance, but due to the evolution of technology, mathematical flow patterns can be solved by applying the RANS equations. The towing test results can be applied for a low Froude number, but for a high Froude number, all phenomena that appear along the simulation aren’t relevant because the scale effects cannot provide an accurate simulation of the phenomena for a real ship (scale 1:1). Hence, this study presents methods of improving the mesh quality by making comparisons with the experimental tests, and also presents the limits of the towing test results.

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References

[1]. ISIS-CFD Centrale Nantes / CNRS
[2]. ITTC, “CFD General, Uncertainty Analysis in CFD, Verification and Validation Methodology and Procedures”, ITTC, Recommended Practice and Guidelines, 7.5-03-01- 01, 2008.
[3]. Olivieri, A., Pistani, F., Avanzini A., Stern, F., “Towing Tank Experiments of Resistance and Trim, Boundary Layer, Wake, and Free-Surface Flow Around a Naval Combatant INSEAN2340 Model”, Iowa Institute of Hydraulic Research, The University of Iowa, IIHR report No.421, 2001.
[4]. Verseteeg, H.K., Malalasekera, W. “An Introduction to Computational Fluid Dynamics The Finite Method”, Second Edition, Pearson Education Limited 1995/2007 - United Kingdom, ISBN:978-0-13-127498-3
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Published
2019-10-25
How to Cite
1.
Galateanu L, Baciu MC, Pohilca A, Mocanu CI. The mesh influence in fluid flow. Annals of ”Dunarea de Jos” University of Galati. Fascicle XI Shipbuilding [Internet]. 25Oct.2019 [cited 8Aug.2020];42:13-8. Available from: http://www.gup.ugal.ro/ugaljournals/index.php/fanship/article/view/2154
Section
Articles

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