Abstract
This paper presents a three-dimensional non-hydrostatic wave model NHWAVE for simulating wave interactions with porous structures. The model calculates the porous media flow based on well-balanced volume-averaged Reynolds-averaged Navier-Stokes equations (VARANS) in σ coordinate. The turbulence field within the porous structures is simulated by an improved k-ε model. To account for the temporally varying porosity at the grid cell center introduced by the variation of free surface elevation, the porosity is updated at each time step in the computation. The model is calibrated and validated using a wide range of laboratory measurements, involving dam-break flow through porous media, 3D solitary wave interactions with a porous structure, 2D solitary wave interactions with a submerged permeable obstacle as well as periodic wave breaking over a submerged porous breakwater with steep slopes. The model is shown to be capable of well simulating wave reflection, diffraction, wave breaking and wave transmission through porous structures, as well as the turbulent flow field around the permeable structures. It is also demonstrated in the paper that the current non-hydrostatic model is computationally much more efficient than the existing porous flow models based on VOF approach. The non-hydrostatic wave model NHWAVE can be a useful tool for studying wave-structure interactions.
| Original language | English |
|---|---|
| Pages (from-to) | 84-98 |
| Number of pages | 15 |
| Journal | Coastal Engineering |
| Volume | 91 |
| DOIs | |
| Publication status | Published - 2014 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Ocean Engineering
- Environmental Engineering
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Non-hydrostatic modeling of wave interactions with porous structures. / Ma, Gangfeng; Shi, Fengyan; Hsiao, Shih-Chun; Wu, Yun Ta.
In: Coastal Engineering, Vol. 91, 01.01.2014, p. 84-98.Research output: Contribution to journal › Article
TY - JOUR
T1 - Non-hydrostatic modeling of wave interactions with porous structures
AU - Ma, Gangfeng
AU - Shi, Fengyan
AU - Hsiao, Shih-Chun
AU - Wu, Yun Ta
PY - 2014/1/1
Y1 - 2014/1/1
N2 - This paper presents a three-dimensional non-hydrostatic wave model NHWAVE for simulating wave interactions with porous structures. The model calculates the porous media flow based on well-balanced volume-averaged Reynolds-averaged Navier-Stokes equations (VARANS) in σ coordinate. The turbulence field within the porous structures is simulated by an improved k-ε model. To account for the temporally varying porosity at the grid cell center introduced by the variation of free surface elevation, the porosity is updated at each time step in the computation. The model is calibrated and validated using a wide range of laboratory measurements, involving dam-break flow through porous media, 3D solitary wave interactions with a porous structure, 2D solitary wave interactions with a submerged permeable obstacle as well as periodic wave breaking over a submerged porous breakwater with steep slopes. The model is shown to be capable of well simulating wave reflection, diffraction, wave breaking and wave transmission through porous structures, as well as the turbulent flow field around the permeable structures. It is also demonstrated in the paper that the current non-hydrostatic model is computationally much more efficient than the existing porous flow models based on VOF approach. The non-hydrostatic wave model NHWAVE can be a useful tool for studying wave-structure interactions.
AB - This paper presents a three-dimensional non-hydrostatic wave model NHWAVE for simulating wave interactions with porous structures. The model calculates the porous media flow based on well-balanced volume-averaged Reynolds-averaged Navier-Stokes equations (VARANS) in σ coordinate. The turbulence field within the porous structures is simulated by an improved k-ε model. To account for the temporally varying porosity at the grid cell center introduced by the variation of free surface elevation, the porosity is updated at each time step in the computation. The model is calibrated and validated using a wide range of laboratory measurements, involving dam-break flow through porous media, 3D solitary wave interactions with a porous structure, 2D solitary wave interactions with a submerged permeable obstacle as well as periodic wave breaking over a submerged porous breakwater with steep slopes. The model is shown to be capable of well simulating wave reflection, diffraction, wave breaking and wave transmission through porous structures, as well as the turbulent flow field around the permeable structures. It is also demonstrated in the paper that the current non-hydrostatic model is computationally much more efficient than the existing porous flow models based on VOF approach. The non-hydrostatic wave model NHWAVE can be a useful tool for studying wave-structure interactions.
UR - http://www.scopus.com/inward/record.url?scp=84902241127&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84902241127&partnerID=8YFLogxK
U2 - 10.1016/j.coastaleng.2014.05.004
DO - 10.1016/j.coastaleng.2014.05.004
M3 - Article
VL - 91
SP - 84
EP - 98
JO - Coastal Engineering
JF - Coastal Engineering
SN - 0378-3839
ER -