[katakgoreng]

Hi Niels,

Thanks for your effort in developing the wave2Foam toolbox.
I'm new to OPENFOAM and wave2Foam (start using if two weeks ago). Luckily, I managed to get things up and running.
I want to assess the accuracy of wave2Foam for the stokesFirst case. Using really low wave steepness in intermediate water, I tried running the waveFlume tutorial. The phasing matches well with linear potential waves theory but the amplitude got shifted upward making it slightly larger than that of analytical solution. I tried using mesh twice denser but still got the same result.

WAVE PARAMETER USED
WaveType = stokesFirst
Depth, d = 0.4 m
Period, T = 2 s
Height, H = 0.01 m
WaveNumber, k = 1.70048
Omega, w = 3.14159

CORRESPONDING WAVE PROPERTIES
Wave amplitude, a = 0.005 m
Wave steepness, ak = 0.0085
Dispersion parameter, kd = 0.68

DOMAIN AND MESH PARAMETERS
Domain length = 18 m
Domain height = 0.6 m
Horizontal cell = 360
Vertical cell = 60
Delta x = 0.05 m
Delta y = 0.01 m

ANALYTICAL SOLUTION FOR LINEAR WATER WAVES (FREE SURFACE)
ZetaAnalytical = a * cos ( k*x - omega*t )

RESULTS
Phasing error ~ 0 %
Amplitude error ~ 4 %

Is there anything that I should tweak in order to get more accurate result?
Does viscosity and density between the water and air affect the result?



Kind regards,
katakgoreng