COMPUTATIONAL ANALYSIS OF FLOWS

The size distribution of black liquor droplets sprayed into a kraft re covery furnace can have a dramatic effect on furnace efficiency and sa fety. We have developed a computational fluid dynamics tool that allow s studying the processes leading to the breakup of a sheet of black li quor into individual droplets. This is accomplished by solving the ful l Navier-Stokes equations, describing the flow within the black liquor coupled with a potential flow solution in the vapor phase. The result s show the accuracy of our technique in predicting the stability of a planar, viscous liquid sheet flowing through a stagnant, inviscid vapo r phase.