The settling velocity is an important physical parameter of coral sand.Because of the rod coral sand is obviously different from other shapes of coral sand,it is not suitable to apply the settling velocity formula of the existing coral sand for calculation.The rod coral...MORE The settling velocity is an important physical parameter of coral sand.Because of the rod coral sand is obviously different from other shapes of coral sand,it is not suitable to apply the settling velocity formula of the existing coral sand for calculation.The rod coral sand was selected to study the settling velocity an...