Appendix 2. Batch file to generate the geometry of the Wigley hull for the Sink & Trim wizard

escape escape escape

view layers new body_wet

escape escape escape

geometry create nurbsline

escape create nurbsline

-3.0000            0.00000.2000

-2.5000            0.09170.2000

-2.0000            0.16670.2000

-1.5000            0.22500.2000

-1.0000            0.26670.2000

-0.5000            0.29170.2000

0.00000.30000.2000

0.50000.29170.2000

1.00000.26670.2000

1.50000.22500.2000

2.00000.16670.2000

2.50000.09170.2000

3.00000.00000.2000

escape create nurbsline

-3.0000            0.00000.0500

-2.5000            0.09170.0500

-2.0000            0.16670.0500

-1.5000            0.22500.0500

-1.0000            0.26670.0500

-0.5000            0.29170.0500

0.00000.30000.0500

0.50000.29170.0500

1.00000.26670.0500

1.50000.22500.0500

2.00000.16670.0500

2.50000.09170.0500

3.00000.00000.0500

escape create nurbsline

-3.0000            0.00000.0000

-2.5000            0.09170.0000

-2.0000            0.16670.0000

-1.5000            0.22500.0000

-1.0000            0.26670.0000

-0.5000            0.29170.0000

0.00000.30000.0000

0.50000.29170.0000

1.00000.26670.0000

1.50000.22500.0000

2.00000.16670.0000

2.50000.09170.0000

3.00000.00000.0000

escape create nurbsline

-3.0000            0.0000-0.0500

-2.5000            0.0900-0.0500

-2.0000            0.1637-0.0500

-1.5000            0.2210-0.0500

-1.0000            0.2619-0.0500

-0.5000            0.2865-0.0500

0.00000.2947-0.0500

0.50000.2865-0.0500

1.00000.2619-0.0500

1.50000.2210-0.0500

2.00000.1637-0.0500

2.50000.0900-0.0500

3.00000.0000-0.0500

escape create nurbsline

-3.0000            0.0000-0.1000

-2.5000            0.0851-0.1000

-2.0000            0.1548-0.1000

-1.5000            0.2090-0.1000

-1.0000            0.2477-0.1000

-0.5000            0.2709-0.1000

0.00000.2787-0.1000

0.50000.2709-0.1000

1.00000.2477-0.1000

1.50000.2090-0.1000

2.00000.1548-0.1000

2.50000.0851-0.1000

3.00000.0000-0.1000

escape create nurbsline

-3.0000            0.0000-0.1500

-2.5000            0.0770-0.1500

-2.0000            0.1400-0.1500

-1.5000            0.1890-0.1500

-1.0000            0.2240-0.1500

-0.5000            0.2450-0.1500

0.00000.2520-0.1500

0.50000.2450-0.1500

1.00000.2240-0.1500

1.50000.1890-0.1500

2.00000.1400-0.1500

2.50000.0770-0.1500

3.00000.0000-0.1500

escape create nurbsline

-3.0000            0.0000-0.2000

-2.5000            0.0656-0.2000

-2.0000            0.1193-0.2000

-1.5000            0.1610-0.2000

-1.0000            0.1908-0.2000

-0.5000            0.2087-0.2000

0.00000.2147-0.2000

0.50000.2087-0.2000

1.00000.1908-0.2000

1.50000.1610-0.2000

2.00000.1193-0.2000

2.50000.0656-0.2000

3.00000.0000-0.2000

escape create nurbsline

-3.0000            0.0000-0.2500

-2.5000            0.0509-0.2500

-2.0000            0.0926-0.2500

-1.5000            0.1250-0.2500

-1.0000            0.1481-0.2500

-0.5000            0.1620-0.2500

0.00000.1667-0.2500

0.50000.1620-0.2500

1.00000.1481-0.2500

1.50000.1250-0.2500

2.00000.0926-0.2500

2.50000.0509-0.2500

3.00000.0000-0.2500

escape create nurbsline

-3.0000            0.0000-0.3000

-2.5000            0.0330-0.3000

-2.0000            0.0600-0.3000

-1.5000            0.0810-0.3000

-1.0000            0.0960-0.3000

-0.5000            0.1050-0.3000

0.00000.1080-0.3000

0.50000.1050-0.3000

1.00000.0960-0.3000

1.50000.0810-0.3000

2.00000.0600-0.3000

2.50000.0330-0.3000

3.00000.0000-0.3000

escape create nurbsline

-3.0000            0.0000-0.3750

-2.5000            0.0000-0.3750

-2.0000            0.0000-0.3750

-1.5000            0.0000-0.3750

-1.0000            0.0000-0.3750

-0.5000            0.0000-0.3750

0.00000.0000-0.3750

0.50000.0000-0.3750

1.00000.0000-0.3750

1.50000.0000-0.3750

2.00000.0000-0.3750

2.50000.0000-0.3750

3.00000.0000-0.3750

escape escape escape

geometry create nurbssurface parallellines layer:body_wet

escape escape escape

geometry delete line layer:body_wet escape escape

geometry delete line layer:body_dry escape escape

geometry delete point layer:body_wet escape escape

geometry delete point layer:body_dry escape escape

escape escape escape


REFERENCES

[1] Armaly, B. F., Durst, F., Pereira, J. C. F., Schönung, B., 'Experimental and theoretical investigation of backward-facing step flow'. J. Fluid Mech. 127, 473-496, 1983.

[2] R. Codina, M. Vázquez and O.C. Zienkiewicz, 'A fractional step method for the solution of the compressible Navier-Stokes equations'. Publication CIMNE no. 118, Barcelona 1997.

[3] M. A. Cruchaga, 'A study of the backwards-facing step problem using a generalised streamline formulation'. Communications in Numerical Methods in Engineering, 14, 697-708, 1998.

[4] García, J., Oñate, E., Sierra, H., Sacco, C. and Idelsohn, S. 'A Stabilised Numerical Method for Analysis of Ship Hydrodynamics'. Proceedings Eccomas Conference on CFD, 7-11 September 1998, Athens, John Wiley, 1998.

[5] J. García, 'A Finite Element Method for the Hydrodynamic Analysis of Naval Structures' (in Spanish), Ph.D. Thesis, Univ. Politécnica de Cataluña, Barcelona, December 1999.

[6] GiD, A pre/postprocessing environment for generations of data and visualisation in finite element analysis. CIMNE, Barcelona, 1996.

[7] Löhner, R., Yang, E., Oñate, E. and Idelsohn, S. An Unstructured Grid-Based, Parallel Free Surface Solver. Presented in IAAA journal. CIMNE. Barcelona 1996.

[8] Oñate, E., and García, J., 'A finite element method for fluid-structure interactions with surface waves using a finite increment calculus formulation', to appear in Comp. Meth. Appl. Mech. Engng.

[9] E. Oñate, J. García and S. Idelsohn, 'A methodology for analysis of fluid structure interaction accounting for free surface waves'. European Conference in Computational Mechanics (ECCM 99), München, Germany, 1999.

[10] E. Oñate, J. García and S. Idelsohn, 'On the stabilisation of numerical solutions of advective-diffusive transport and fluid flow problems'. Comp.Meth. Appl. Mech. Engng, 5, 233-267, 1998

[11] Oñate, E., Idelsohn, S. and Sacco, C. Numerical Solutions for the ship drags problems using no-moving free surface boundary conditions. Research Report, CIMNE, Barcelona 1996.

[12] Phang, V., 'Incompressible finite element Navier Stokes solution with adaptive remeshing techniques', Final Year Project, Imperial College, London/ CIMNE, Barcelona 1998.

[13] Roshko, A., On the development of turbulent wakes from vortex streets, NACA report 1191, 1954.

[14] M. Vázquez, R. Codina and O.C. Zienkiewicz, 'A general algorithm for compressible and incompressible flow. Part I: The split characteristic based scheme'. Int. J. Num. Meth. in Fluids, 20, 869-85, 1995

[15] M. Vázquez, R. Codina and O.C. Zienkiewicz, 'A general algorithm for compressible and incompressible flow. Part II: Tests on the explicit form'. Int. J. Num. Meth. in Fluids, 20, No. 8-9, 886-913, 1995.



[1]This comparison must be considered as an approximation, since the two forces (viscous and pressure) obtained in Tdyn include some coupling effect that makes the exact comparison impossible.

[2]When doing the copy of the original box, do not forget to select the option “Duplicate entities” in the Copy window.