Numerical simulation of wave-induced sandbar formation

作者：Zhang Chi; Zheng Jin Hai^*; Wang Yi Gang

来源：Advances in Water Science, 2012, 23(1): 104-109.

DOI：CNKI:32.1309.P.20120104.2012.010

• Beach profile
• Bed evolutions
• Measured data
• Numerical tests
• Physical mechanism
• Profile evolution
• Random waves
• Sandbar
• Schmidt numbers
• Sediment transport rate
• Sloping beaches
• Submodels
• Surface roller
• Wave heights

A process-based numerical model is developed to simulate the formation of a sandbar beach profile, which includes a set of sub-models for wave, undertow, sediment transport, and bed evolution. The model is validated to simulate the transformation of a gently sloping beach profile to a sandbar beach profile during 12 hours under random waves. The calculated wave height, undertow velocity, sediment transport rate and bed elevation agree well with the measured data. Additional numerical tests are performed to investigate the effects of the surface roller slope, the Schmidt number and the bed repose angle on the hydrodynamics and the resulting profile evolution. It is demonstrated that the present model can well represent the important physical mechanisms of the wave-induced sandbar formation.

• 出版日期2012
• 单位河海大学