Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-18T18:45:50.786Z Has data issue: false hasContentIssue false

Free-surface flow over a semicircular obstruction, including the influence of gravity and surface tension

Published online by Cambridge University Press:  20 April 2006

Lawrence K. Forbes
Affiliation:
Applied Mathematics Department, University of Adelaide, South Australia 5000 Present address: Institute of Hydraulic Research, The University of Iowa, Iowa City, Iowa 52242, U.S.A.

Abstract

A previous study by Forbes & Schwartz (1982) on flow under gravity of a fluid over a submerged semicircular disturbance is generalized to include the effects of surface tension. A linearized theory is presented, in which the existence of three different branches of solution is predicted. The solution of the fully nonlinear problem by a boundary-integral technique supports this prediction. The wave resistance experienced by the obstacle is computed for the linearized and nonlinear theories.

Type
Research Article
Copyright
© 1983 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Aitchison, J. M. 1979 A variable finite element method for the calculation of flow over a weir. Rutherford Lab. Rep. RL-79069.Google Scholar
Chen, B. & Saffman, P. G. 1979 Steady gravity-capillary waves on deep water-I. Weakly nonlinear waves Stud. Appl. Math. 60, 183210.Google Scholar
Chen, B. & Saffman, P. G. 1980 Steady gravity-capillary waves on deep water - II. Numerical results for finite amplitude Stud. Appl. Math. 62, 95111.Google Scholar
Cokelet, E. D. 1977 Steep gravity waves in water of arbitrary uniform depth.Phil. Trans. R. Soc. Land A 286, 183230.
Forbes, L. K. 1981a On the wave resistance of a submerged semi-elliptical body J. Engng Maths 15, 287298.Google Scholar
Forbes, L. K. 1981b Non-linear, drag-free flow over a submerged semi-elliptical body. J. Engng Maths (to appear).
Forbes, L. K. & Schwartz, L. W. 1982 Free-surface flow over a semicircular obstruction J. Fluid Mech. 114, 299314.Google Scholar
Gazdar, A. S. 1973 Generation of waves of small amplitude by an obstacle placed on the bottom of a running stream J. Phys. Soc. Japan 34, 530538.Google Scholar
Haussling, H. J. & Coleman, R. M. 1977 Finite-difference computations using boundary-fitted coordinates for free-surface potential flows generated by submerged bodies. In Proc. 2nd. Int. Conf. on Numerical Ship Hydrodynamics, Berkeley, pp. 221233.
Hogan, S. J. 1979 Some effects of surface tension on steep water waves J. Fluid Mech. 91, 167180.Google Scholar
Hogan, S. J. 1980 Some effects of surface tension on steep water waves. Part 2 J. Fluid Mech. 96, 417445.Google Scholar
Kerczek, C. Von & Salvesen, N. 1977 Non-linear free-surface effects - the dependence on Froude number. In Proc. 2nd Int. Conf. on Numerical Ship Hydrodynamics, Berkeley, pp. 292300.
Lamb, H. 1932 Hydrodynamics, 6th edn. Cambridge University Press.
Schwartz, L. W. 1974 Computer extension and analytic continuation of Stokes’ expansion for gravity waves J. Fluid Mech. 62, 553578.Google Scholar
Schwartz, L. W. & VANDEN BROECK, J.-M. 1979 Numerical solution of the exact equations for capillary-gravity waves J. Fluid Mech. 95, 119139.Google Scholar
Shanks, S. P. & Thompson, J. F. 1977 Numerical solution of the Navier-Stokes equations for 2D hydrofoils in or below a free surface. In Proc. 2nd Int. Conf. on Numerical Ship Hydrodynamics, Berkeley, pp. 202220.
Stokes, G. G. 1880 Mathematical and Physical Papers, vol. 1. Cambridge University Press.
Wehausen, J. V. & Laitone, E. V. 1960 Surface waves. In Handbuch der Physik, vol. 9. Springer.