Difference between revisions of "Integral Equation for the Finite Depth Green Function at Surface"

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{{complete pages}}
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We want to solve
 
We want to solve
 
<center><math>
 
<center><math>
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\left(
 
\left(
 
\alpha\phi(\xi) - w(\xi)
 
\alpha\phi(\xi) - w(\xi)
\right)d \xi
+
\right)\mathrm{d} \xi
 
</math></center>
 
</math></center>
 
where  
 
where  
<math>G(x,\xi)<\math> is the [[Free-Surface Green Function]] for two-dimensional waves, with singularity at
+
<math>G(x,\xi)</math> is the [[Free-Surface Green Function]] for two-dimensional waves, with singularity at
 
the water surface. We break the surface into <math>N</math> evenly spaced point
 
the water surface. We break the surface into <math>N</math> evenly spaced point
 
<math>x_n = -L = hn</math> where <math>h=2L/N</math> and <math>n=0,1,\dots,N</math>
 
<math>x_n = -L = hn</math> where <math>h=2L/N</math> and <math>n=0,1,\dots,N</math>
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A program to calculate the coefficients for the semi-infinite dock problems can be found here
 
A program to calculate the coefficients for the semi-infinite dock problems can be found here
[http://www.math.auckland.ac.nz/~meylan/code/boundary_element/matrix_G_surface.m matrix_G_surface.m]
+
{{green function surface code}}
  
 
=== Additional code ===
 
=== Additional code ===

Latest revision as of 09:06, 19 August 2010


We want to solve

[math]\displaystyle{ \phi(x) = \int_{-L}^{L}G(x,\xi) \left( \alpha\phi(\xi) - w(\xi) \right)\mathrm{d} \xi }[/math]

where [math]\displaystyle{ G(x,\xi) }[/math] is the Free-Surface Green Function for two-dimensional waves, with singularity at the water surface. We break the surface into [math]\displaystyle{ N }[/math] evenly spaced point [math]\displaystyle{ x_n = -L = hn }[/math] where [math]\displaystyle{ h=2L/N }[/math] and [math]\displaystyle{ n=0,1,\dots,N }[/math]


Matlab Code

A program to calculate the coefficients for the semi-infinite dock problems can be found here matrix_G_surface.m

Additional code

This program requires