Meniscus height as a function of dimensionless variables for drop-on-demand applications

This paper reports experimental correlations for the dimensionless meniscus height (h/D) as a function of the dimensionless variables that govern the physics of meniscus generation for drop-on-demand applications. Two liquids were considered in this study: namely, ethylene glycol and ethanol. These liquids were selected because of their wide applicability in drop-on-demand applications. The dimensionless governing variables were found by performing a dimensional analysis of the system under consideration. The dimensionless meniscus height (h/D) was found to depend on two dimensionless numbers: the S number (S = sigma/rho D (2) g) and the P number (P = p (abs) /rho Dg). The behaviors of h/D for both the liquids were found to increase with increasing variables of interest and are discussed in terms of correlations.