Unfortunately, there is nothing as powerful for creating liquid effects as Real Flow for After Effects. Arguably the best particle plug-in is Trapcode Particular, but I’ve only had success using it for certain kinds of liquid simulations (faucet/hose streams, aerosol-type sprays etc.). There is a new plug-in that I haven’t had a lot of time to experiment with called Turbulence 2D from a company called Jawset that looks promising, might be worth a look.