Linear stern waves in finite depth channels
McCue, Scott W. & Stump, David M. (2000) Linear stern waves in finite depth channels. Quarterly Journal of Mechanics and Applied Mathematics, 53(4), pp. 629-643.
This paper formulates an analytically tractable problem for the wake generated by a long flat bottom ship by considering the steady free surface flow of an inviscid, incompressible fluid emerging from beneath a semi-infinite rigid plate. The flow is considered to be irrotational and two-dimensional so that classical potential flow methods can be exploited. In addition, it is assumed that the draft of the plate is small compared to the depth of the channel. The linearised problem is solved exactly using a Fourier transform and the Wiener-Hopf technique,
and it is shown that there is a family of subcritical solutions characterised by a train of sinusoidal waves on the downstream free surface. The amplitude of these waves decreases as the Froude number increases. Supercritical solutions are also obtained, but, in general, these have infinite vertical velocities at the trailing edge of the
plate. Consideration of further terms in the expansions suggests a way of canceling the singularity for certain values of the Froude number.
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|Item Type:||Journal Article|
|Keywords:||stern waves, free surface flows, Wiener-Hopf technique, semi-infinite plate|
|Subjects:||Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > APPLIED MATHEMATICS (010200) > Approximation Theory and Asymptotic Methods (010201)|
Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > APPLIED MATHEMATICS (010200) > Theoretical and Applied Mechanics (010207)
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
Past > Schools > Mathematical Sciences
|Copyright Owner:||Copyright 2000 Oxford University Press|
|Deposited On:||15 Feb 2011 09:54|
|Last Modified:||30 Jan 2013 08:36|
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