Solving the Helmholtz equation

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manpreet Tuteehub forum best answer Best Answer 2 years ago

 

If I wanted to figure out how to do a simulation with the Helmholtz equation, how would I do it? Or, what kinds of techniques would I have to learn in order to figure it out?

Background: 1st year Aero Engineering student (this isn't on our syllabus, just general interest)

Thanks!

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manpreet 2 years ago

One way to solve the Helmholtz equation rather directly in free space (i.e. the wave speed is constant) is to use a double or single layer potential. So we have

Δu+k2u=0 in R3Δu+k2u=0 in R3

 

For example, given a smooth boundary DR3∂D⊂R3 and a function ϕL2(D)ϕ∈L2(∂D), let

Dϕ(x):=Dϕ(y)Φ(x,y)νydSyDϕ(x):=∫∂Dϕ(y)∂Φ(x,y)∂νydSy
where Φ(x,y)=eik
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