  Liquid bridges are commonly encountered in nature and the liquid transfer
induced by their rupture are widely used in various industrial applications. In
this work, with the focus on the porous tip, we studied the impacts of
capillary effects on the liquid transfer induced by the rupture through
numerical simulations. To depict the capillary effects of a porous tip, a time
scale ratio, R_T, is proposed to compare the competing mechanisms of
spontaneous imbibitiona and external drag. In terms of R_T, we then develop a
theoretical model for estimating the liquid retention ratio considering the
geometry, porosity and wettability of tips. The mecahnism presented in this
work provides a possible approach to control the liquid transfer with better
accuracy in microfluidics or microfabrications.
