TY - JOUR
T1 - Internal wave generation in a non-hydrostatic wave model
AU - Vasarmidis, Panagiotis
AU - Stratigaki, Vasiliki
AU - Suzuki, Tomohiro
AU - Zijlema, Marcel
AU - Troch, Peter
PY - 2019
Y1 - 2019
N2 - In this work, internal wave generation techniques are developed in an open source non-hydrostatic wave model (SimulatingWAves till SHore, SWASH) for accurate generation of regular and irregular long-crested waves. Two different internal wave generation techniques are examined: a source term addition method where additional surface elevation is added to the calculated surface elevation in a specific location in the domain and a spatially distributed source functionwhere a spatially distributed mass is added in the continuity equation. These internal wave generation techniques in combination with numerical wave absorbing sponge layers are proposed as an alternative to the weakly reflective wave generation boundary to avoid re-reflections in case of dispersive and directional waves. The implemented techniques are validated against analytical solutions and experimental data including water surface elevations, orbital velocities, frequency spectra and wave heights. The numerical results show a very good agreement with the analytical solution and the experimental data indicating that SWASH with the addition of the proposed internal wave generation technique can be used to study coastal areas and wave energy converter (WEC) farms even under highly dispersive and directional waves without any spurious reflection from the wave generator.
AB - In this work, internal wave generation techniques are developed in an open source non-hydrostatic wave model (SimulatingWAves till SHore, SWASH) for accurate generation of regular and irregular long-crested waves. Two different internal wave generation techniques are examined: a source term addition method where additional surface elevation is added to the calculated surface elevation in a specific location in the domain and a spatially distributed source functionwhere a spatially distributed mass is added in the continuity equation. These internal wave generation techniques in combination with numerical wave absorbing sponge layers are proposed as an alternative to the weakly reflective wave generation boundary to avoid re-reflections in case of dispersive and directional waves. The implemented techniques are validated against analytical solutions and experimental data including water surface elevations, orbital velocities, frequency spectra and wave heights. The numerical results show a very good agreement with the analytical solution and the experimental data indicating that SWASH with the addition of the proposed internal wave generation technique can be used to study coastal areas and wave energy converter (WEC) farms even under highly dispersive and directional waves without any spurious reflection from the wave generator.
KW - Internal wave generation
KW - Non-hydrostatic model
KW - Source term addition method
KW - Spatially distributed source function
KW - SWASH
UR - http://www.scopus.com/inward/record.url?scp=85066297174&partnerID=8YFLogxK
U2 - 10.3390/w11050986
DO - 10.3390/w11050986
M3 - Article
AN - SCOPUS:85066297174
SN - 2073-4441
VL - 11
JO - Water (Switzerland)
JF - Water (Switzerland)
IS - 5
M1 - 986
ER -