Effect of Liquid Bridge Volume on Cohesive Sediment Motion

A little quantity of water addition between two spherical particles imparts great strength in mechanical behaviour of the particles and the soil as a whole. For the arrangement of the particle or grain “Truncated Pyramid Model (TPM)” has been considered. Pore pressure force, cohesive force, force due to weight of the grains and hydrostatic force have been considered here in TPM for fully submerged grains with both cases of water level rising and water level falling by varying inter-granular liquid bridge volume. Conservation of moment of momentum principle has been implemented for the quantification of escape velocity or separation speed of the grains in microscopic level, which is the main parameter for dislodging of the grain from the riverbank. The variation of the separation speed with the inter-granular distance has been plotted for three different liquid bridge volumes (10, 20, and 30 nl) and three different grain sizes (300, 400 and 500 μm of radius).