Help regarding WaveLength
Hello guys!
I am running the 08_WavesFlap example in "main", and trying to understand how this property is calculated:
I am struggling to figure out how wave length is calculated and if somebody could show me directly in the code where this calculation is done it would help me a lot. I have found this on the internet:
https://www.scubageek.com/articles/wwwceler.html
But am struggling to calculate it since, it feels like I should know both d and L at the same time, where I only know d (depth) initially..
Kind regards
Comments
Trying to understand it better, I am playing around with the values quite a bit. It is a bit hard for me though, since I get a lot of warnings where I am a bit lost
And also Madsen's criteria is a bit problematic for me;
HL^2/d^3 < 8π^2/3
Is it 8 pi^2 / 3 or 8 pi^(2/3)
I have downloaded the source code and trying to search through all files for "Waves breaking .." etc. but I simply cannot figure out where the calculations of these warnings is actually done.
Kind regards
Hi @Asalih3d ,
Not sure if you have managed to figure this one out yet, but figured I'd help anyway
When calculating the wavelength, I use a generic formula applicable to all relative depths
d/Lo = (d/L)tanh((2pi*d)/L) where Lo is the 'deepwater' wavelength, Lo = gT^2/2*pi
Solving this iteratively using any numerical method will give you the answer calculated by DSPH as the wavelength L is the only unknown
Hope this helps :)
Hello @atish_d !
No I actually never managed to figure it out - thanks for that. Could you share where you was taught this or where to find more information about how to do it? :-)
Kind regards
Hi @Asalih3d
I learnt it as a coastal engineering student, search for 'dispersion relation', this should give you the info you're looking for :)
Regards