This paper presents a high-resolution (2′X2′) numerical model of coastalcoupled wave-current interaction with explicit consideration of the effects of wave-currentinteraction on bottom stress. For two selected storm...This paper presents a high-resolution (2′X2′) numerical model of coastalcoupled wave-current interaction with explicit consideration of the effects of wave-currentinteraction on bottom stress. For two selected storms with measured data in the Yellow River coastalarea of the Bohai Sea, it is shown that the bottom stress calculated by using a coupledwave-current model is increased, as one would expect, compared with the bottom stress computed withan uncoupled current model. Moreover, the current velocity field is also changed, but thecorresponding current directions show less influence in the two simulations. The extents of changesin bottom stress and current velocity vary with storm intensities. The results further imply thatthe coupled wave-current model should be used as the basis for simulating the current velocity andsea level in the near shore region.展开更多
The three-dimensional Princeton Ocean Model (POM) was employed to simulatethe tide and current simul-tanuously for the first time in the Fushan Bay, Qingdao, China. Byadopting the elevation condition that was combined...The three-dimensional Princeton Ocean Model (POM) was employed to simulatethe tide and current simul-tanuously for the first time in the Fushan Bay, Qingdao, China. Byadopting the elevation condition that was combined with the tides M2, S2, K1 and O1 at the openboundary and by choosing the proper value of bottom roughness, the horizontal and verticaldistributions of the tidal current and water level variations in the bay were computed. The resultsagree well with the field observation data, indicating that this model can be used to predictaccurately the variation of tides and currents in the Fushan Bay and other costal regions in thefuture. Our study also provides useful information and a data base for the Olympic Projects thatwill be conducted in the Fushan Bay in 2008.展开更多
The focus of this study is a coastal high-resolution (2′ X 2′ ) two-waycoupled wave-tide-surge interaction model, including three main physical mechanisms. Comparisons andanalysis of simulated and measured wave heig...The focus of this study is a coastal high-resolution (2′ X 2′ ) two-waycoupled wave-tide-surge interaction model, including three main physical mechanisms. Comparisons andanalysis of simulated and measured wave heights and sea level considered two moderate storm casesfor the Huang-he Delta coastal area. The effects of different physical mechanisms on wave heightsare mainly influenced by wave-current interaction, including radiation stress. Wave-age dependentsurface wind stress and radiation stress mechanisms in the coupling wave-tide-surge interactionmodel show positive impact on sea level, and the wave-current interaction bottom stress mechanismshows negative impact on seal level. The comprehensive effects of the three main physical mechanismsshow positive net impact on seal level and increase sea level by around 20cm for the stormsconsidered. Overall, the results we show that the wave heights and sea levels simulated by thecoupled wave-tide-surge model agree better with the measured values than uncoupled model results,particularly for peak storm conditions.展开更多
For the purpose of time-domain calculation of wave forces on moored ships ina harbor, the 2D/3D coupled numerical model was developed, in which the horizontally 2Dshallow-water wave model based on the improved Boussin...For the purpose of time-domain calculation of wave forces on moored ships ina harbor, the 2D/3D coupled numerical model was developed, in which the horizontally 2Dshallow-water wave model based on the improved Boussinesq equations was adopted for the calculationin the wide region located far from the ships while the 3D numerical model based on theReynolds-Averaged Navier-Stokes (RANS) equations was used in the limited region adjacent to theships. The domain connection technique with overlaping region between different model regions wasapplied and examined. It is shown that the present partially 3D hybrid model saves calculation timesignificantly compared to the full 3D model for the whole region and is capable of reproducing thecharacteristics of 3D and complicated flows around the ships and 3D hydrodynamic loads on them,which cannot be reproduced by the 2D model alone.展开更多
In the present paper combining the relationship between wave steepness andwave age with the significant wave energy balance equation for wind wave, a new wind wave growthrelation is presented. Comparisons with the oth...In the present paper combining the relationship between wave steepness andwave age with the significant wave energy balance equation for wind wave, a new wind wave growthrelation is presented. Comparisons with the other existing wind wave growth relations show that theresults in present paper accord better with the wind wave growth process.展开更多
文摘This paper presents a high-resolution (2′X2′) numerical model of coastalcoupled wave-current interaction with explicit consideration of the effects of wave-currentinteraction on bottom stress. For two selected storms with measured data in the Yellow River coastalarea of the Bohai Sea, it is shown that the bottom stress calculated by using a coupledwave-current model is increased, as one would expect, compared with the bottom stress computed withan uncoupled current model. Moreover, the current velocity field is also changed, but thecorresponding current directions show less influence in the two simulations. The extents of changesin bottom stress and current velocity vary with storm intensities. The results further imply thatthe coupled wave-current model should be used as the basis for simulating the current velocity andsea level in the near shore region.
文摘The three-dimensional Princeton Ocean Model (POM) was employed to simulatethe tide and current simul-tanuously for the first time in the Fushan Bay, Qingdao, China. Byadopting the elevation condition that was combined with the tides M2, S2, K1 and O1 at the openboundary and by choosing the proper value of bottom roughness, the horizontal and verticaldistributions of the tidal current and water level variations in the bay were computed. The resultsagree well with the field observation data, indicating that this model can be used to predictaccurately the variation of tides and currents in the Fushan Bay and other costal regions in thefuture. Our study also provides useful information and a data base for the Olympic Projects thatwill be conducted in the Fushan Bay in 2008.
文摘The focus of this study is a coastal high-resolution (2′ X 2′ ) two-waycoupled wave-tide-surge interaction model, including three main physical mechanisms. Comparisons andanalysis of simulated and measured wave heights and sea level considered two moderate storm casesfor the Huang-he Delta coastal area. The effects of different physical mechanisms on wave heightsare mainly influenced by wave-current interaction, including radiation stress. Wave-age dependentsurface wind stress and radiation stress mechanisms in the coupling wave-tide-surge interactionmodel show positive impact on sea level, and the wave-current interaction bottom stress mechanismshows negative impact on seal level. The comprehensive effects of the three main physical mechanismsshow positive net impact on seal level and increase sea level by around 20cm for the stormsconsidered. Overall, the results we show that the wave heights and sea levels simulated by thecoupled wave-tide-surge model agree better with the measured values than uncoupled model results,particularly for peak storm conditions.
文摘For the purpose of time-domain calculation of wave forces on moored ships ina harbor, the 2D/3D coupled numerical model was developed, in which the horizontally 2Dshallow-water wave model based on the improved Boussinesq equations was adopted for the calculationin the wide region located far from the ships while the 3D numerical model based on theReynolds-Averaged Navier-Stokes (RANS) equations was used in the limited region adjacent to theships. The domain connection technique with overlaping region between different model regions wasapplied and examined. It is shown that the present partially 3D hybrid model saves calculation timesignificantly compared to the full 3D model for the whole region and is capable of reproducing thecharacteristics of 3D and complicated flows around the ships and 3D hydrodynamic loads on them,which cannot be reproduced by the 2D model alone.
文摘In the present paper combining the relationship between wave steepness andwave age with the significant wave energy balance equation for wind wave, a new wind wave growthrelation is presented. Comparisons with the other existing wind wave growth relations show that theresults in present paper accord better with the wind wave growth process.
