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http://dx.doi.org/10.3744/SNAK.2018.55.3.265

Direct Numerical and Large Eddy Simulations of Transitional Flows around Turbulence Stimulators at Very Low Speeds  

Lee, Sang Bong (Department of Naval Architecture and Offshore Engineering, Dong-A University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.55, no.3, 2018 , pp. 265-273 More about this Journal
Abstract
Direct numerical and large eddy simulations of transitional flows around studs installed on flat plate and bulbous bow have been performed to investigate an effectiveness of turbulence stimulators on laminar-to-turbulence transition at a very low speed. The flow velocity was determined to be 0.366m/s corresponding to 4 knots of full-scale ship speed when the objective ship was Kriso container ship. The spatial evolution of skin friction coefficient disclosed that a fully development of turbulence was observed behind the second stud installed on flat plate while a rapid transition from laminar to turbulence gave rise to the fully development of turbulence behind the first stud installed on bulbous bow. A comparison of streamwise mean velocity profiles showed that the viscous sublayer and log-layer were in good agreement with previous results although the friction velocity of Smagrosinsky sub-grid scale model was about 10% larger than that of direct numerical simulation. While the turbulence intensities of bulbous bow was similar to those of flat plate in inner region, larger intensities of turbulence were observed in outer region of bulbous bow than those of flat plate.
Keywords
Large eddy simulation; Direct numerical simulation; Turbulence stimulator; OpenFOAM; Transitional flow;
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Times Cited By KSCI : 5  (Citation Analysis)
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1 Choi, J.E., Min, K.S., Kim, J.H., Lee, S.B. & Seo, H.W., 2010. Resistance and propulsion characteristics of various commercial ships based on CFD results. Ocean Engineering, 37, pp.549-566.   DOI
2 Deardorff, J.W., 1970. A numerical study of three-dimensional turbulent channel flow at large Reynolds numbers. Journal of Fluid Mechanics, 41, pp.453-480.   DOI
3 Germano, M.U., Piomelli, P., Moin, P. & Cabot, W.H., 1991. A dynamic subgrid-scale eddy viscosity model. Physics of Fluids, 3, pp.1760-1765.   DOI
4 Lee, S.B. & Lee, Y.M., 2014. Statistical reliablity analysis of numerical simulation for prediction of model-ship resistance. Journal of the Society of Naval Architects of Korea, 51(4), pp.321-327.   DOI
5 ITTC-2002, 2002. Procedures for resistance, propulsion and propeller open water tests. 23rd International Towing Tank Conference, Venice, Italy. 8-14, September, 2002, 7.5-01-01-01.
6 Lee, S.B., 2016. Direct numerical simulations of turbulent boundary layer using OpenFOAM and adapted mesh. Journal of the Society of Naval Architects of Korea, 53(3), pp.210-216.   DOI
7 Lee, S.B., 2017. A study on temporal accuracy of OpenFOAM. International Journal of Naval Architects and Ocean Engineering, 9(4), pp.429-438.   DOI
8 Lee, S.B., Park, D.W. & Paik, K.-J., 2017. Grid tests for large eddy simulation of transitional flows around turbulence stimulators. Journal of the Korean Society of Marine Environment & Safety, 23(1), pp.112-121.   DOI
9 Lilly, D.K., 1992. A proposed modification of the Germano subgrid-scale closure method. Physics of Fluids, 4, pp.633-635.   DOI
10 Moin, P. & Kim, J., 1982. Numerical investigation of turbulent channel flow. Journal of Fluid Mechanics, 118, pp.341-377.   DOI
11 Osterlund, J.M., 1999. Experimental studies of zero pressure-gradient turbulent boundary layer flow. Ph.D. Thesis. Royal Institute of Technology.
12 Spalart, P.R., 1988, Direct Numerical Simulation of a Turbulent Boundary Layer up to $Re{\theta}$=1410. Journal of Fluid Mechanics, 187, pp.61-98.   DOI
13 Hughes, G., 1954. Frictional and form resistance in turbulent flow and a proposed formulation for use in model and ship correlation. Transaction of the Institution of Naval Architects, 96, pp.314-376.
14 Park, S., Park, S.W., Rhee, S.H., Lee, S.B., Choi, J.E. & Kang, S.H., 2013. Investigation on the wall function implementation for the prediction of ship resistance. International Journal of Naval Architects and Ocean Engineering, 5, pp.33-46.   DOI
15 Park, S.H., Lee, S.B. & Lee, Y.M., 2014. Study on the estimation of the optimum trims in container carriers by using CFD analysis of ship resistances. Journal of the Society of Naval Architects of Korea, 51(5), pp.429-434.   DOI
16 Purtell, L.P., Klebanoff, P.S. & Buckley, F.T., 1981, Turbulent boundary layers at low Reynolds numbers. Physics of Fluids, 24, pp.802-811.   DOI