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Reconsidering the seawater-density parameter in hydrodynamic flow transport equations for coastal boulders
New Zealand Journal of Geology and Geophysics ( IF 2.2 ) Pub Date : 2020-01-29 , DOI: 10.1080/00288306.2020.1716815
James P. Terry 1 , Shoaib A. Malik 1
Affiliation  

ABSTRACT Existing hydrodynamic flow transport equations for coastal boulder transport are useful for estimating post-event the characteristics of extreme storm waves and tsunamis. However, the effect of suspended sediment concentration (SSC) on seawater density is normally ignored. This is unrealistic given that turbulent runup flows easily entrain available fine sediment. Proper consideration of SSC can be encouraged by including a mixed-fluid density coefficient (Cρ ) as a multiplier for clear-seawater density, where elevated sediment content can be assumed and estimated. Minimum flow velocities required for boulder transport are shown to reduce as sediment concentrations increase.

中文翻译:

重新考虑沿海巨石水动力流动传输方程中的海水密度参数

摘要 现有的用于沿海巨石运输的流体动力流动传输方程可用于估计极端风暴波和海啸的事后特征。然而,悬浮泥沙浓度(SSC)对海水密度的影响通常被忽略。鉴于湍流的上升流很容易夹带可用的细粒沉积物,这是不现实的。通过将混合流体密度系数 (Cρ ) 作为清澈海水密度的乘数,可以鼓励对 SSC 的适当考虑,其中可以假设和估计沉积物含量升高。随着沉积物浓度的增加,巨石运输所需的最小流速显示出降低。
更新日期:2020-01-29
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