NUMERICAL STUDY OF NEARSHORE HYDRODYNAMICS UNDER STORM WAVE CONDITIONS IN HUJEONG BEACH, EAST COAST OF KOREA

Yeon S Chang,Jong Dae Do,Kyungmo Ahn,Jae-Youll Jin

doi:10.9753/icce.v36.currents.67

Abstract

In this study, we present the results of numerical model study to simulate the hydrodynamic conditions observed in Hujeong Beach in the east coast of the Republic of Kore from December, 2016 to January, 2017 during which several extratropical cyclones hit the area causing extreme wave conditions. Three acoustic instrumentation systems were moored from the coast to a location outside the surf zone where the water depth was ~8m to measure waves, currents and suspended sediment concentrations. For the numerical model, we employed the CADMAS-SURF Raynolds-Averaged Navier-Stokes (RANS) model to generate the wave conditions over the region of the field experiment.

Highlights

In this study, we present the results of numerical model study to simulate the hydrodynamic conditions observed in Hujeong Beach in the east coast of the Republic of Kore from December, 2016 to January, 2017 during which several extratropical cyclones hit the area causing extreme wave conditions
This result indicates that some turbulence quantities are misrepresented by the Raynolds-Averaged Navier-Stokes (RANS) model, which may cause significant error in the prediction of sediment suspension events from the seabeds
FIELD EXPERIMENT The wave energy in the east coast of the republic of Korea is usually higher in winter than in summer because extratropical cyclones often develop in this region (Jeong et al, 2016)

Summary

Introduction

We present the results of numerical model study to simulate the hydrodynamic conditions observed in Hujeong Beach in the east coast of the Republic of Kore from December, 2016 to January, 2017 during which several extratropical cyclones hit the area causing extreme wave conditions. Energy (TKE) varied, during one wave period, corresponding to the streamwise flow rate as it had energy peak near the time of maximum flow rate. The vertical component of the Reynolds stresses, −u′̅w̅′ showed peaks near the time of flow reversal.

Results

Conclusion